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• Java: Preventing array going out of bounds.

  - by Troy

  I'm working on a game of checkers, if you want to read more about you can view it here; http://minnie.tuhs.org/I2P/Assessment/assig2.html When I am doing my test to see if the player is able to get to a certain square on the grid (i.e. +1 +1, +1 -1 .etc) from it's current location, I get an java.lang.ArrayIndexOutOfBoundsException error. This is the code I am using to make the move; public static String makeMove(String move, int playerNumber) { // variables to contain the starting and destination coordinates, subtracting 1 to match array size int colStart = move.charAt(1) - FIRSTCOLREF - 1; int rowStart = move.charAt(0) - FIRSTROWREF - 1; int colEnd = move.charAt(4) - FIRSTCOLREF - 1; int rowEnd = move.charAt(3) - FIRSTROWREF - 1; // variable to contain which player is which char player, enemy; if (playerNumber==1) { player= WHITEPIECE; enemy= BLACKPIECE; } else { player= BLACKPIECE; enemy= WHITEPIECE; } // check that the starting square contains a player piece if (grid [ colStart ] [ rowStart ] == player) { // check that the player is making a diagonal move if (grid [ colEnd ] [ rowEnd ] == grid [ (colStart++) ] [ (rowEnd++) ] && grid [ colEnd ] [ rowEnd ] == grid [ (colStart--) ] [ (rowEnd++) ] && grid [ colEnd ] [ rowEnd ] == grid [ (colStart++) ] [ (rowEnd--) ] && grid [ colEnd ] [ rowEnd ] == grid [ (colStart--) ] [ (rowEnd--) ]) { // check that the destination square is free if (grid [ colEnd ] [ rowEnd ] == BLANK) { grid [ colStart ] [ rowStart ] = BLANK; grid [ colEnd ] [ rowEnd ] = player; } } // check if player is jumping over a piece else if (grid [ colEnd ] [ rowEnd ] == grid [ (colStart+2) ] [ (rowEnd+2) ] && grid [ colEnd ] [ rowEnd ] == grid [ (colStart-2) ] [ (rowEnd+2) ] && grid [ colEnd ] [ rowEnd ] == grid [ (colStart+2) ] [ (rowEnd-2) ] && grid [ colEnd ] [ rowEnd ] == grid [ (colStart-2) ] [ (rowEnd-2) ]) { // check that the piece in between contains an enemy if ((grid [ (colStart++) ] [ (rowEnd++) ] == enemy ) && (grid [ (colStart--) ] [ (rowEnd++) ] == enemy ) && (grid [ (colStart++) ] [ (rowEnd--) ] == enemy ) && (grid [ (colStart--) ] [ (rowEnd--) ] == enemy )) { // check that the destination is free if (grid [ colEnd ] [ rowEnd ] == BLANK) { grid [ colStart ] [ rowStart ] = BLANK; grid [ colEnd ] [ rowEnd ] = player; } } } } I'm not sure how I can prevent the error from happening, what do you recommend?

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• Java Best Practice for type resolution at runtime.

  - by Brian

  I'm trying to define a class (or set of classes which implement the same interface) that will behave as a loosely typed object (like JavaScript). They can hold any sort of data and operations on them depend on the underlying type. I have it working in three different ways but none seem ideal. These test versions only allow strings and integers and the only operation is add. Adding integers results in the sum of the integer values, adding strings concatenates the strings and adding an integer to a string converts the integer to a string and concatenates it with the string. The final version will have more types (Doubles, Arrays, JavaScript-like objects where new properties can be added dynamically) and more operations. Way 1: public interface DynObject1 { @Override public String toString(); public DynObject1 add(DynObject1 d); public DynObject1 addTo(DynInteger1 d); public DynObject1 addTo(DynString1 d); } public class DynInteger1 implements DynObject1 { private int value; public DynInteger1(int v) { value = v; } @Override public String toString() { return Integer.toString(value); } public DynObject1 add(DynObject1 d) { return d.addTo(this); } public DynObject1 addTo(DynInteger1 d) { return new DynInteger1(d.value + value); } public DynObject1 addTo(DynString1 d) { return new DynString1(d.toString()+Integer.toString(value)); } } ...and similar for DynString1 Way 2: public interface DynObject2 { @Override public String toString(); public DynObject2 add(DynObject2 d); } public class DynInteger2 implements DynObject2 { private int value; public DynInteger2(int v) { value = v; } @Override public String toString() { return Integer.toString(value); } public DynObject2 add(DynObject2 d) { Class c = d.getClass(); if(c==DynInteger2.class) { return new DynInteger2(value + ((DynInteger2)d).value); } else { return new DynString2(toString() + d.toString()); } } } ...and similar for DynString2 Way 3: public class DynObject3 { private enum ObjectType { Integer, String }; Object value; ObjectType type; public DynObject3(Integer v) { value = v; type = ObjectType.Integer; } public DynObject3(String v) { value = v; type = ObjectType.String; } @Override public String toString() { return value.toString(); } public DynObject3 add(DynObject3 d) { if(type==ObjectType.Integer && d.type==ObjectType.Integer) { return new DynObject3(Integer.valueOf(((Integer)value).intValue()+((Integer)value).intValue())); } else { return new DynObject3(value.toString()+d.value.toString()); } } } With the if-else logic I could use value.getClass()==Integer.class instead of storing the type but with more types I'd change this to use a switch statement and Java doesn't allow switch to use Classes. Anyway... My question is what is the best way to go about something thike this?

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• Write PEM encoded certificate in file - java

  - by user1349407

  Good day. I recently create X.509 certificate by using bouncy castle API. I need to save the certificate result rather than display the result. I tried to use FileOutputStream, but it does not work. regards the result is like follows -----BEGIN CERTIFICATE----- MIICeTCCAeKgAwIBAgIGATs8OWsXMA0GCSqGSIb3DQEBCwUAMBsxGTAXBgNVBAMT... -----END CERTIFICATE----- The code is belows import java.io.FileOutputStream; //example of a basic CA public class PKCS10CertCreateExample { public static X509Certificate[] buildChain() throws Exception { //create the certification request KeyPair pair = chapter7.Utils.generateRSAKeyPair(); PKCS10CertificationRequest request = PKCS10ExtensionExample.generateRequest(pair); //create a root certificate KeyPair rootPair=chapter7.Utils.generateRSAKeyPair(); X509Certificate rootCert = X509V1CreateExample.generateV1Certificate (rootPair); //validate the certification request if(!request.verify("BC")) { System.out.println("request failed to verify!"); System.exit(1); } //create the certificate using the information in the request X509V3CertificateGenerator certGen = new X509V3CertificateGenerator(); certGen.setSerialNumber(BigInteger.valueOf(System.currentTimeMillis())); certGen.setIssuerDN(rootCert.getSubjectX500Principal()); certGen.setNotBefore(new Date(System.currentTimeMillis())); certGen.setNotAfter(new Date(System.currentTimeMillis()+50000)); certGen.setSubjectDN(request.getCertificationRequestInfo().getSubject()); certGen.setPublicKey(request.getPublicKey("BC")); certGen.setSignatureAlgorithm("SHA256WithRSAEncryption"); certGen.addExtension(X509Extensions.AuthorityKeyIdentifier, false, new AuthorityKeyIdentifierStructure(rootCert)); certGen.addExtension(X509Extensions.SubjectKeyIdentifier, false, new SubjectKeyIdentifierStructure(request.getPublicKey("BC"))); certGen.addExtension(X509Extensions.BasicConstraints, true, new BasicConstraints(false)); //certGen.addExtension(X509Extensions.KeyUsage, true, new BasicConstraints(false)); certGen.addExtension(X509Extensions.KeyUsage, true, new KeyUsage(KeyUsage.digitalSignature | KeyUsage.keyEncipherment)); certGen.addExtension(X509Extensions.ExtendedKeyUsage, true, new ExtendedKeyUsage(KeyPurposeId.id_kp_serverAuth)); //extract the extension request attribute ASN1Set attributes = request.getCertificationRequestInfo().getAttributes(); for(int i=0;i!=attributes.size();i++) { Attribute attr = Attribute.getInstance(attributes.getObjectAt(i)); //process extension request if(attr.getAttrType().equals(PKCSObjectIdentifiers.pkcs_9_at_extensionRequest)) { X509Extensions extensions = X509Extensions.getInstance(attr.getAttrValues().getObjectAt(0)); Enumeration<?> e = extensions.oids(); while(e.hasMoreElements()) { DERObjectIdentifier oid = (DERObjectIdentifier)e.nextElement(); X509Extension ext = extensions.getExtension(oid); certGen.addExtension(oid, ext.isCritical(), ext.getValue().getOctets()); } } } X509Certificate issuedCert = certGen.generateX509Certificate(rootPair.getPrivate()); return new X509Certificate[]{issuedCert, rootCert}; } public static void main(String[] args) throws Exception { X509Certificate[] chain = buildChain(); PEMWriter pemWrt = new PEMWriter(new OutputStreamWriter(System.out)); pemWrt.writeObject(chain[0]); //pemWrt.writeObject(chain[1]); pemWrt.close(); //write it out //FileOutputStream fOut = new FileOutputStream("pkcs10req.req"); //fOut.write(chain[0].toString()); //fOut.write() //System.out.println(chain[0].toString()); //fOut.close(); } }

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• Linked lists in Java - help with assignment

  - by user368241

  Representation of a string in linked lists In every intersection in the list there will be 3 fields : The letter itself. The number of times it appears consecutively. A pointer to the next intersection in the list. The following class CharNode represents a intersection in the list : public class CharNode { private char _data; private int _value; private charNode _next; public CharNode (char c, int val, charNode n) { _data = c; _value = val; _next = n; } public charNode getNext() { return _next; } public void setNext (charNode node) { _next = node; } public int getValue() { return _value; } public void setValue (int v) { value = v; } public char getData() { return _data; } public void setData (char c) { _data = c; } } The class StringList represents the whole list : public class StringList { private charNode _head; public StringList() { _head = null; } public StringList (CharNode node) { _head = node; } } Add methods to the class StringList according to the details : (I will add methods gradually according to my specific questions) (Pay attention, these are methods from the class String and we want to fulfill them by the representation of a string by a list as explained above) public int indexOf (int ch) - returns the index in the string it is operated on of the first appeareance of the char "ch". If the char "ch" doesn't appear in the string, returns -1. If the value of fromIndex isn't in the range, returns -1. Pay attention to all the possible error cases. Write what is the time complexity and space complexity of every method that you wrote. Make sure the methods you wrote are effective. It is NOT allowed to use ready classes of Java. It is NOT allowed to move to string and use string operations. Here is my try to write the method indexOf (int ch). Kindly assist me with fixing the bugs so I can move on. public int indexOf (int ch) { int count = 0; charNode pose = _head; if (pose == null ) { return -1; } for (pose = _head; pose!=null && pose.getNext()!='ch'; pose = pose.getNext()) { count++; } if (pose!=null) return count; else return -1; }

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• Java - is this an idiom or pattern, behavior classes with no state

  - by Berlin Brown

  I am trying to incorporate more functional programming idioms into my java development. One pattern that I like the most and avoids side effects is building classes that have behavior but they don't necessarily have any state. The behavior is locked into the methods but they only act on the parameters passed in. The code below is code I am trying to avoid: public class BadObject { private Map<String, String> data = new HashMap<String, String>(); public BadObject() { data.put("data", "data"); } /** * Act on the data class. But this is bad because we can't * rely on the integrity of the object's state. */ public void execute() { data.get("data").toString(); } } The code below is nothing special but I am acting on the parameters and state is contained within that class. We still may run into issues with this class but that is an issue with the method and the state of the data, we can address issues in the routine as opposed to not trusting the entire object. Is this some form of idiom? Is this similar to any pattern that you use? public class SemiStatefulOOP { /** * Private class implies that I can access the members of the <code>Data</code> class * within the <code>SemiStatefulOOP</code> class and I can also access * the getData method from some other class. * * @see Test1 * */ class Data { protected int counter = 0; public int getData() { return counter; } public String toString() { return Integer.toString(counter); } } /** * Act on the data class. */ public void execute(final Data data) { data.counter++; } /** * Act on the data class. */ public void updateStateWithCallToService(final Data data) { data.counter++; } /** * Similar to CLOS (Common Lisp Object System) make instance. */ public Data makeInstance() { return new Data(); } } // End of Class // Issues with the code above: I wanted to declare the Data class private, but then I can't really reference it outside of the class: I can't override the SemiStateful class and access the private members. Usage: final SemiStatefulOOP someObject = new SemiStatefulOOP(); final SemiStatefulOOP.Data data = someObject.makeInstance(); someObject.execute(data); someObject.updateStateWithCallToService(data);

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• run shell command from java

  - by Aykut

  Hi, I am working on an application an have an issue about running shell command from java application. here is the code: public String execRuntime(String cmd) { Process proc = null; int inBuffer, errBuffer; int result = 0; StringBuffer outputReport = new StringBuffer(); StringBuffer errorBuffer = new StringBuffer(); try { proc = Runtime.getRuntime().exec(cmd); } catch (IOException e) { return ""; } try { response.status = 1; result = proc.waitFor(); } catch (InterruptedException e) { return ""; } if (proc != null && null != proc.getInputStream()) { InputStream is = proc.getInputStream(); InputStream es = proc.getErrorStream(); OutputStream os = proc.getOutputStream(); try { while ((inBuffer = is.read()) != -1) { outputReport.append((char) inBuffer); } while ((errBuffer = es.read()) != -1) { errorBuffer.append((char) errBuffer); } } catch (IOException e) { return ""; } try { is.close(); is = null; es.close(); es = null; os.close(); os = null; } catch (IOException e) { return ""; } proc.destroy(); proc = null; } if (errorBuffer.length() > 0) { logger .error("could not finish execution because of error(s)."); logger.error("*** Error : " + errorBuffer.toString()); return ""; } return outputReport.toString(); } but when i try to exec command like : /export/home/test/myapp -T "some argument" myapp reads "some argument" as two seperated arguments.but I want to read "some argument" as only a argument. when i directly run this command from terminal, it executed successfully. I tried '"some argument"' ,""some argument"" , "some\ argument" but did not work for me. how can i read this argument as one argument. Thnaks.

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• Fastest way to pad a number in Java to a certain number of digits

  - by Martin

  Am trying to create a well-optimised bit of code to create number of X-digits in length (where X is read from a runtime properties file), based on a DB-generated sequence number (Y), which is then used a folder-name when saving a file. I've come up with three ideas so far, the fastest of which is the last one, but I'd appreciate any advice people may have on this... 1) Instantiate a StringBuilder with initial capacity X. Append Y. While length < X, insert a zero at pos zero. 2) Instantiate a StringBuilder with initial capacity X. While length < X, append a zero. Create a DecimalFormat based on StringBuilder value, and then format the number when it's needed. 3) Create a new int of Math.pow( 10, X ) and add Y. Use String.valueOf() on the new number and then substring(1) it. The second one can obviously be split into outside-loop and inside-loop sections. So, any tips? Using a for-loop of 10,000 iterations, I'm getting similar timings from the first two, and the third method is approximately ten-times faster. Does this seem correct? Full test-method code below... // Setup test variables int numDigits = 9; int testNumber = 724; int numIterations = 10000; String folderHolder = null; DecimalFormat outputFormat = new DecimalFormat( "#,##0" ); // StringBuilder test long before = System.nanoTime(); for ( int i = 0; i < numIterations; i++ ) { StringBuilder sb = new StringBuilder( numDigits ); sb.append( testNumber ); while ( sb.length() < numDigits ) { sb.insert( 0, 0 ); } folderHolder = sb.toString(); } long after = System.nanoTime(); System.out.println( "01: " + outputFormat.format( after - before ) + " nanoseconds" ); System.out.println( "Sanity check: Folder = \"" + folderHolder + "\"" ); // DecimalFormat test before = System.nanoTime(); StringBuilder sb = new StringBuilder( numDigits ); while ( sb.length() < numDigits ) { sb.append( 0 ); } DecimalFormat formatter = new DecimalFormat( sb.toString() ); for ( int i = 0; i < numIterations; i++ ) { folderHolder = formatter.format( testNumber ); } after = System.nanoTime(); System.out.println( "02: " + outputFormat.format( after - before ) + " nanoseconds" ); System.out.println( "Sanity check: Folder = \"" + folderHolder + "\"" ); // Substring test before = System.nanoTime(); int baseNum = (int)Math.pow( 10, numDigits ); for ( int i = 0; i < numIterations; i++ ) { int newNum = baseNum + testNumber; folderHolder = String.valueOf( newNum ).substring( 1 ); } after = System.nanoTime(); System.out.println( "03: " + outputFormat.format( after - before ) + " nanoseconds" ); System.out.println( "Sanity check: Folder = \"" + folderHolder + "\"" );

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• Best approach for using Scanner Objects in Java?

  - by devjeetroy

  Although I'm more of a C++/ASM guy, I have to work with java as a part of my undergrad course at college. Our teacher taught us input using Scanner(System.in), and told us that if multiple functions are were taking user input, it would be advisable that a single Scanner object is passed around so as to reduce chances of the input stream getting screwed up. Now using this approach has gotten me into a situation where I'm trying to use a Scanner.nextLine(), and this statement does not wait for user input. It just moves on to the following statement. I figured there may be some residual cr/lf or other characters in the Scanner that might not have been retrieved are causing the problem. Here is the code. while(lineScanner.hasNext()) { if(isPlaceHolder(temp = lineScanner.next())) { temp = temp.replace("<",""); temp = temp.replace(">", ""); System.out.print("Enter "+aOrA(temp.charAt(0)) +" " +temp + " : "); temp = consoleInput.nextLine(); } outputFileStream.print(temp + " "); } All of the code is inside a function which receives a Scanner object consoleInput. Ok, so what happens when i run it is that when the program enters the if() the first time, It carries out theSystem.out.print, does not wait for user input, and moves on to the second time that it enters the 'if' block. This time, it takes the input and the rest of the program operates normally. What is even more surprising is that when i check the output file created by the program, it is perfect, just as i want to be. Almost as if the first time input using the scanner is correct. I have solved this problem by creating a new system.in Scanner in the function itself, instead of receiving the Scanner object as a parameter. But I am still very curious to know what the hell is happening and why it couldn't be solved using a simple Scanner.reset(). Would it be better to just simply create a Scanner Object for each function? Thanks, Devjeet PS. Although I know how to take input using fileinputstreams and the like, we are not supposed to use it with the homework.

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• Java: Multithreading & UDP Socket Programming

  - by Ravi

  I am new to multithreading & socket programming in Java. I would like to know what is the best way to implement 2 threads - one for receiving a socket and one for sending a socket. If what I am trying to do sounds absurd, pls let me know why! The code is largely inspired from Sun's tutorials online.I want to use Multicast sockets so that I can work with a multicast group. class server extends Thread { static protected MulticastSocket socket = null; protected BufferedReader in = null; public InetAddress group; private static class receive implements Runnable { public void run() { try { byte[] buf = new byte[256]; DatagramPacket pkt = new DatagramPacket(buf,buf.length); socket.receive(pkt); String received = new String(pkt.getData(),0,pkt.getLength()); System.out.println("From server@" + received); Thread.sleep(1000); } catch (IOException e) { System.out.println("Error:"+e); } catch (InterruptedException e) { System.out.println("Error:"+e); } } } public server() throws IOException { super("server"); socket = new MulticastSocket(4446); group = InetAddress.getByName("239.231.12.3"); socket.joinGroup(group); } public void run() { while(1>0) { try { byte[] buf = new byte[256]; DatagramPacket pkt = new DatagramPacket(buf,buf.length); //String msg = reader.readLine(); String pid = ManagementFactory.getRuntimeMXBean().getName(); buf = pid.getBytes(); pkt = new DatagramPacket(buf,buf.length,group,4446); socket.send(pkt); Thread t = new Thread(new receive()); t.start(); while(t.isAlive()) { t.join(1000); } sleep(1); } catch (IOException e) { System.out.println("Error:"+e); } catch (InterruptedException e) { System.out.println("Error:"+e); } } //socket.close(); } public static void main(String[] args) throws IOException { new server().start(); //System.out.println("Hello"); } }

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• Graph Tour with Uniform Cost Search in Java

  - by user324817

  Hi. I'm new to this site, so hopefully you guys don't mind helping a nub. Anyway, I've been asked to write code to find the shortest cost of a graph tour on a particular graph, whose details are read in from file. The graph is shown below: http://img339.imageshack.us/img339/8907/graphr.jpg This is for an Artificial Intelligence class, so I'm expected to use a decent enough search method (brute force has been allowed, but not for full marks). I've been reading, and I think that what I'm looking for is an A* search with constant heuristic value, which I believe is a uniform cost search. I'm having trouble wrapping my head around how to apply this in Java. Basically, here's what I have: Vertex class - ArrayList<Edge> adjacencies; String name; int costToThis; Edge class - final Vertex target; public final int weight; Now at the moment, I'm struggling to work out how to apply the uniform cost notion to my desired goal path. Basically I have to start on a particular node, visit all other nodes, and end on that same node, with the lowest cost. As I understand it, I could use a PriorityQueue to store all of my travelled paths, but I can't wrap my head around how I show the goal state as the starting node with all other nodes visited. Here's what I have so far, which is pretty far off the mark: public static void visitNode(Vertex vertex) { ArrayList<Edge> firstEdges = vertex.getAdjacencies(); for(Edge e : firstEdges) { e.target.costToThis = e.weight + vertex.costToThis; queue.add(e.target); } Vertex next = queue.remove(); visitNode(next); } Initially this takes the starting node, then recursively visits the first node in the PriorityQueue (the path with the next lowest cost). My problem is basically, how do I stop my program from following a path specified in the queue if that path is at the goal state? The queue currently stores Vertex objects, but in my mind this isn't going to work as I can't store whether other vertices have been visited inside a Vertex object. Help is much appreciated! Josh

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• Java Scanner class reading strings

  - by Max

  I've created a scanner class to read through the text file and get the value what I'm after. Let's assume that I have a text file contains 1 : Fnjiei : ID 7868860 : Age 18 2 : Oipuiieerb : ID 334134 : Age 39 3 : Enekaree : ID 6106274 : Age 31 I'm trying to get a name and id number and age, but everytime I try to run my code it gives me an exception. Here's my code. Any suggestion from java gurus?:) public void readFile(String fileName)throws IOException{ Scanner input = null; input = new Scanner(new BufferedReader(new FileReader(fileName))); try { while (input.hasNextLine()){ int howMany = 3; System.out.println(howMany); String userInput = input.nextLine(); String name = ""; String idS = ""; String ageS = ""; int id; int age; int count=0; for (int j = 0; j <= howMany; j++){ for (int i=0; i < userInput.length(); i++){ if(count < 2){ // for name if(Character.isLetter(userInput.charAt(i))){ name+=userInput.charAt(i); // store the name }else if(userInput.charAt(i)==':'){ count++; i++; } }else if(count == 2){ // for id if(Character.isDigit(userInput.charAt(i))){ idS+=userInput.charAt(i); // store the id } else if(userInput.charAt(i)==':'){ count++; i++; } }else if(count == 3){ // for age if(Character.isDigit(userInput.charAt(i))){ ageS+=userInput.charAt(i); // store the age } } id = Integer.parseInt(idS); // convert id to integer age = Integer.parseInt(ageS); // convert age to integer Fighters newFighters = new Fighters(id, name, age); fighterList.add(newFighters); } userInput = input.nextLine(); } } }finally{ if (input != null){ input.close(); } } } My appology if my mere code begs to be changed.

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• refactoring this function in Java

  - by Joel

  Hi folks, I'm learning Java, and I know one of the big complaints about newbie programmers is that we make really long and involved methods that should be broken into several. Well here is one I wrote and is a perfect example. :-D. public void buildBall(){ /* sets the x and y value for the center of the canvas */ double i = ((getWidth() / 2)); double j = ((getHeight() / 2)); /* randomizes the start speed of the ball */ vy = 3.0; vx = rgen.nextDouble(1.0, 3.0); if (rgen.nextBoolean(.05)) vx = -vx; /* creates the ball */ GOval ball = new GOval(i,j,(2 *BALL_RADIUS),(2 * BALL_RADIUS)); ball.setFilled(true); ball.setFillColor(Color.RED); add(ball); /* animates the ball */ while(true){ i = (i + (vx* 2)); j = (j + (vy* 2)); if (i > APPLICATION_WIDTH-(2 * BALL_RADIUS)){ vx = -vx; } if (j > APPLICATION_HEIGHT-(2 * BALL_RADIUS)){ vy = -vy; } if (i < 0){ vx = -vx; } if (j < 0){ vy = -vy; } ball.move(vx + vx, vy + vy); pause(10); /* checks the edges of the ball to see if it hits an object */ colider = getElementAt(i, j); if (colider == null){ colider = getElementAt(i + (2*BALL_RADIUS), j); } if (colider == null){ colider = getElementAt(i + (2*BALL_RADIUS), j + (2*BALL_RADIUS)); } if (colider == null){ colider = getElementAt(i, j + (2*BALL_RADIUS)); } /* If the ball hits an object it reverses direction */ if (colider != null){ vy = -vy; /* removes bricks when hit but not the paddle */ if (j < (getHeight() -(PADDLE_Y_OFFSET + PADDLE_HEIGHT))){ remove(colider); } } } You can see from the title of the method that I started with good intentions of "building the ball". There are a few issues I ran up against: The problem is that then I needed to move the ball, so I created that while loop. I don't see any other way to do that other than just keep it "true", so that means any other code I create below this loop won't happen. I didn't make the while loop a different function because I was using those variables i and j. So I don't see how I can refactor beyond this loop. So my main question is: How would I pass the values of i and j to a new method: "animateBall" and how would I use ball.move(vx + vx, vy + vy); in that new method if ball has been declared in the buildBall method? I understand this is probably a simple thing of better understanding variable scope and passing arguments, but I'm not quite there yet...

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• Java array of arry [matrix] of an integer partition with fixed term

  - by user335209

  Hello, for my study purpose I need to build an array of array filled with the partitions of an integer with fixed term. That is given an integer, suppose 10 and given the fixed number of terms, suppose 5 I need to populate an array like this 10 0 0 0 0 9 0 0 0 1 8 0 0 0 2 7 0 0 0 3 ............ 9 0 0 1 0 8 0 0 1 1 ............. 7 0 1 1 0 6 0 1 1 1 ............ ........... 0 6 1 1 1 ............. 0 0 0 0 10 am pretty new to Java and am getting confused with all the for loops. Right now my code can do the partition of the integer but unfortunately it is not with fixed term public class Partition { private static int[] riga; private static void printPartition(int[] p, int n) { for (int i= 0; i < n; i++) System.out.print(p[i]+" "); System.out.println(); } private static void partition(int[] p, int n, int m, int i) { if (n == 0) printPartition(p, i); else for (int k= m; k > 0; k--) { p[i]= k; partition(p, n-k, n-k, i+1); } } public static void main(String[] args) { riga = new int[6]; for(int i = 0; i<riga.length; i++){ riga[i] = 0; } partition(riga, 6, 1, 0); } } the output I get it from is like this: 1 5 1 4 1 1 3 2 1 3 1 1 1 2 3 1 2 2 1 1 2 1 2 1 2 1 1 1 what i'm actually trying to understand how to proceed is to have it with a fixed terms which would be the columns of my array. So, am stuck with trying to get a way to make it less dynamic. Any help?

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• Customs toString in Java not giving desired output and throwing error

  - by user2972048

  I am writing a program in Java to accept and validate dates according to the Gregorian Calendar. My public boolean setDate(String aDate) function for an incorrect entry is suppose to change the boolean goodDate variable to false. That variable is suppose tell the toString function, when called, to output "Invalid Entry" but it does not. My public boolean setDate(int d, int m, int y) function works fine though. I've only included the problem parts as its a long piece of code. Thanks public boolean setDate(int day, int month, int year){ // If 1 <= day <= 31, 1 <= month <= 12, and 0 <= year <= 9999 & the day match with the month // then set object to this date and return true // Otherwise,return false (and do nothing) boolean correct = isTrueDate(day, month, year); if(correct){ this.day = day; this.month = month; this.year = year; return true; }else{ goodDate = false; return false; } //return false; } public boolean setDate(String aDate){ // If aDate is of the form "dd/mm/yyyy" or "d/mm/yyyy" // Then set the object to this date and return true. // Otherwise, return false (and do nothing) Date d = new Date(aDate); boolean correct = isTrueDate(d.day, d.month, d.year); if(correct){ this.day = d.day; this.month = d.month; this.year = d.year; return true; }else{ goodDate = false; return false; } } public String toString(){ // outputs a String of the form "dd/mm/yyyy" // where dd must be 2 digits (with leading zero if needed) // mm must be 2 digits (with leading zero if needed) // yyyy must be 4 digits (with leading zeros if needed) String day1; String month1; String year1; if(day<10){ day1 = "0" + Integer.toString(this.day); } else{ day1 = Integer.toString(this.day); } if(month<10){ month1 = "0" + Integer.toString(this.month); } else{ month1 = Integer.toString(this.month); } if(year<10){ year1 = "00" + Integer.toString(this.year); } else{ year1 = Integer.toString(this.year); } if(goodDate){ return day1 +"/" +month1 +"/" + year1; }else{ goodDate = true; return "Invalid Entry"; } } Thank you

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• SQL 2000: Intermittent Error 7399 with OLE DB Provider for Microsoft Jet

  - by Tim Lara

  I am using SQL Server 2000 on Windows Server 2003 SP2 and have set up a linked server to point at an Access 97 database using the OLE DB Provider 4.0 for Microsoft Jet. The problem I am having sounds almost exactly like the one described in this Microsoft KB article, except that the error I am getting is intermittent: http://support.microsoft.com/kb/814398 The SQL Server is running under the Local System account (which I don't have authority to change), and the Access 97 .mdb file that the linked server points to is on a Win XP Pro machine on the same LAN as the SQL Server machine, inside of a shared folder with permissions set to "Everyone" and "Full Control". Now, if the linked server connection never worked, it would make more sense that the problem is merely a permissions issue with the Local System account as the KB article above suggests, but the maddening thing is that sometimes the connection works just fine. When it fails, the error message is always the same: Error 7399: OLE DB provider 'Microsoft.Jet.OLEDB.4.0' reported an error. [OLE/DB provider returned message: Unspecified error] OLE DB error trace [OLE/DB Provider 'Microsoft.Jet.OLEDB.4.0' IDBInitialize::Initialize returned 0x80004005: ]. Also, not only does the linked server setup occasionally work just fine on this one particular SQL Server, what is supposed to be exactly the same setup on 25 other servers works just fine EVERY TIME! Obviously, something in the non-working setup must not be exactly the same, but I'm having trouble figuring out where to look for the differences since the error message SQL Server returns is so vague. I know our sysadmins have had numerous issues with Active Directory replication across our domain, so my best guess is that there is some sort of odd group policy corruption going on, but I thought I'd ask here to see if I might be overlooking something more straightforward. Any ideas on how to further isolate the error would be greatly appreciated! For the record, here is a list of things I've already tried: Rebooting the SQL Server machine. Fixes the issue temporarily, then the error returns within a minute or two of startup. (This is why I suspect a rogue group policy that is slow to apply fouling things up.) Importing all database objects from the Access 97 mdb into a new, clean mdb file. Makes no difference. Moving the Access 97 mdb file to a local directory on the SQL Server machine instead of accessing it via a share on the Win XP Pro LAN machine. This works, but does not solve the problem because the mdb needs to be on the client machine for performance reasons and the ability to work "stand alone". Plus, the same shared folder access works fine on all other servers / clients on my network. Compared all the SQL Server, Windows Server, etc versions to a known working setup and everything appears to be the same.

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• SQL 2000: Intermittent Error 7399 with OLE DB Provider for Microsoft Jet

  - by Tim Lara

  I am using SQL Server 2000 on Windows Server 2003 SP2 and have set up a linked server to point at an Access 97 database using the OLE DB Provider 4.0 for Microsoft Jet. The problem I am having sounds almost exactly like the one described in this Microsoft KB article, except that the error I am getting is intermittent: http://support.microsoft.com/kb/814398 The SQL Server is running under the Local System account (which I don't have authority to change), and the Access 97 .mdb file that the linked server points to is on a Win XP Pro machine on the same LAN as the SQL Server machine, inside of a shared folder with permissions set to "Everyone" and "Full Control". Now, if the linked server connection never worked, it would make more sense that the problem is merely a permissions issue with the Local System account as the KB article above suggests, but the maddening thing is that sometimes the connection works just fine. When it fails, the error message is always the same: Error 7399: OLE DB provider 'Microsoft.Jet.OLEDB.4.0' reported an error. [OLE/DB provider returned message: Unspecified error] OLE DB error trace [OLE/DB Provider 'Microsoft.Jet.OLEDB.4.0' IDBInitialize::Initialize returned 0x80004005: ]. Also, not only does the linked server setup occasionally work just fine on this one particular SQL Server, what is supposed to be exactly the same setup on 25 other servers works just fine EVERY TIME! Obviously, something in the non-working setup must not be exactly the same, but I'm having trouble figuring out where to look for the differences since the error message SQL Server returns is so vague. I know our sysadmins have had numerous issues with Active Directory replication across our domain, so my best guess is that there is some sort of odd group policy corruption going on, but I thought I'd ask here to see if I might be overlooking something more straightforward. Any ideas on how to further isolate the error would be greatly appreciated! For the record, here is a list of things I've already tried: Rebooting the SQL Server machine. Fixes the issue temporarily, then the error returns within a minute or two of startup. (This is why I suspect a rogue group policy that is slow to apply fouling things up.) Importing all database objects from the Access 97 mdb into a new, clean mdb file. Makes no difference. Moving the Access 97 mdb file to a local directory on the SQL Server machine instead of accessing it via a share on the Win XP Pro LAN machine. This works, but does not solve the problem because the mdb needs to be on the client machine for performance reasons and the ability to work "stand alone". Plus, the same shared folder access works fine on all other servers / clients on my network. Compared all the SQL Server, Windows Server, etc versions to a known working setup and everything appears to be the same.

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• Replicate between mysql 5.0.xx community and enterprise edition over ssh

  - by Arlukin

  I'm trying to setup a mysql replication over an SSH tunnel. The odd thing about this setup is that I have one master with mysql 5.0.60sp1-enterprise-gpl-log and one slave with mysql 5.0.67-community-log. Could it be so that it's not possible to replicate between community and enterprise edition? As you can see in my log below, it's possible to login on the remote server with the mysql client. But the replication get "Can't connect to MySQL server on '127.0.0.1' (13)" Is it any log file I have forgotten to look in, to get more info? [root@mysql1-av ~]# mysql -uroot -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 73 Server version: 5.0.67-community-log MySQL Community Edition (GPL) Type 'help;' or '\h' for help. Type '\c' to clear the buffer. The version of the slave mysql [root@mysql1-av ~]# autossh -f -M 20001 -L 3307:10.200.200.200:3306 [email protected] -N [root@mysql1-av ~]# mysql -h127.0.0.1 --port 3307 -uroot -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 5189 Server version: 5.0.60sp1-enterprise-gpl-log MySQL Enterprise Server (GPL) Type 'help;' or '\h' for help. Type '\c' to clear the buffer. mysql> Aborted Login to the master mysql with the mysql client over the ssh tunnel. [root@mysql1-av ~]# mysql -uroot -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 75 Server version: 5.0.67-community-log MySQL Community Edition (GPL) Type 'help;' or '\h' for help. Type '\c' to clear the buffer. mysql> change master to master_host='127.0.0.1', MASTER_PORT=3307, master_user='xxxx', master_password='xxxx', master_log_file='bin.000001'; Query OK, 0 rows affected (0.00 sec) mysql> start slave; Query OK, 0 rows affected (0.00 sec) mysql> show slave status \G *************************** 1. row *************************** Slave_IO_State: Connecting to master Master_Host: 127.0.0.1 Master_User: replNSG Master_Port: 3307 Connect_Retry: 60 Master_Log_File: bin.000001 Read_Master_Log_Pos: 4 Relay_Log_File: relay.000001 Relay_Log_Pos: 98 Relay_Master_Log_File: bin.000001 Slave_IO_Running: No Slave_SQL_Running: Yes Replicate_Do_DB: Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0 Last_Error: Skip_Counter: 0 Exec_Master_Log_Pos: 4 Relay_Log_Space: 98 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: NULL 1 row in set (0.00 sec) Start the replication, but it breaks on IO. [root@mysql1-av ~]# tail /var/log/mysqld.log 120921 22:17:59 [Note] Slave I/O thread killed while connecting to master 120921 22:17:59 [Note] Slave I/O thread exiting, read up to log 'bin.000001', position 4 120921 22:17:59 [Note] Error reading relay log event: slave SQL thread was killed 120921 22:29:36 [Note] Slave SQL thread initialized, starting replication in log 'bin.000001' at position 4, relay log '/var/lib/mysql/relay.000001' position: 4 120921 22:29:36 [ERROR] Slave I/O thread: error connecting to master '[email protected]:3307': Error: 'Can't connect to MySQL server on '127.0.0.1' (13)' errno: 2003 retry-time: 60 retries: 86400 Because it can't connect to the master server.

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• Java issues with Apache 2.0 Agent 2.202 for RHEL5 Linux 64bit

  - by Richard

  In trying to install Apache 2.0 Agent 2.202 for RHEL5 Linux 64bit, the dialogue appears as follows. $ ./setup Error : java is not present in path. Please enter JAVAHOME path to pick up java:/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0.x86_64/jre/ Launching installer... Attach to native process failed $ ./setup Error : java is not present in path. Please enter JAVAHOME path to pick up java:/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0.x86_64/jre/lib ./setup: line 80: [: 107:: integer expression expected ./setup: line 83: [: 107:: integer expression expected Error : Incorrect java version (1.2.2 or above is needed). Please enter JAVAHOME path to pick up java: On the server we have the following JREs and I've tried both. $ sudo rpm -qa | egrep "(openjdk|icedtea)" java-1.6.0-openjdk-1.6.0.0-1.27.1.10.8.el5_8 $ find 2>/dev/null | grep -i '/jre/' ./usr/lib/jvm/java-1.4.2-gcj-1.4.2.0/jre/bin/ ... ./usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0.x86_64/jre/ Any suggestions? I know I'm overlooking something. In previous searches I've only found one other posting that comes close but it has no responses (http://forum.parallels.com/showthread.php?t=76556).

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• pl/sql Oracle syntax

  - by Paul

  I have a query in pl/sql that i need to migrate to ms sql. select count(*) from table1 t1 where (conditions1) and (conditions2) and variable = t1.column1(+) Could anyone tell me what the (+) after the column means ? (is it sort of a sum ?)

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• Error OEM (oracle Enterprise Manager)

  - by user137520

  Dear Friends I was trying to configure OEM today. Everything seemed fine. I could login the OEM but when I tried to lauch DBA studio from there, I could not and it said no database has been discovered yet. I don't understand why since I created a database already. Has anyone experienced that? Thank You

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• Yay! Oracle Solaris 11.1 Is Here!

  - by rickramsey

  Even the critters are happy. This is no cosmetic release. It's got TONS of new stuff for both system admins and system developers. In the coming weeks and months I'll highlight specific new capabilities, but for now, here are a few resources to get you started. What's New (pdf) Describes enhancements for sysadmins in: Installation System configuration Virtualization Security and Compliance Networking Data management Kernel/platform support Network drivers User environment And for system developers: Preflight Applications Checker Oracle ExaStack Labs (available to Oracle Partner Network Gold-level members for application certification) Oracle Solaris Studio Integrated Java Virtual Machine (JVM): Updates are now managed using the Image Packaging System (IPS) Migration guides and technology mapping tables for AIX, HP-UX and Red Hat Linux: Download Free downloads for SPARC and x86 are available, along with instructions and tips for using the new repositories and Image Packaging System. Tech Article: How to Upgrade to Oracle Solaris 11.1 You can upgrade using either Oracle's official Solaris release repository or, if you have a support contract, the Support repository. Peter Dennis explains how. Documentation Superbly written instructions from our dedicated cadre of world-renowned but woefully underpaid technical writers: Getting Started Installing, Booting, and Updating Establishing an Oracle Solaris Network Administering Essential Features Administering Network Services Securing the Operating System Monitoring and Tuning Creating and Using Virtual Environments Working with the Desktop Developing Applications Reference Manuals And more Training And don't forget the new online training courses from Oracle University! I really liked them. Here are my first and second impressions. Website Newsletter Facebook Twitter

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• java.lang.RuntimeException: Unable to start activity ComponentInfo cannot be cast to android.widget.ZoomControls

  - by Hwl

  I'm new to android development, hope you all can help me. I got this androidVNC viewer source code from internet. When i'm running the androidVNC application in the emulator, it will exit automatically then i get following errors in LogCat. Can anyone one help me? Thanks. FATAL EXCEPTION: main java.lang.RuntimeException: Unable to start activity ComponentInfo{android.androidVNC/android.androidVNC.VncCanvasActivity}: java.lang.ClassCastException: com.antlersoft.android.zoomer.ZoomControls cannot be cast to android.widget.ZoomControls at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1955) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1980) at android.app.ActivityThread.access$600(ActivityThread.java:122) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1146) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:4340) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:511) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.ClassCastException: com.antlersoft.android.zoomer.ZoomControls cannot be cast to android.widget.ZoomControls at android.androidVNC.VncCanvasActivity.onCreate(VncCanvasActivity.java:585) at android.app.Activity.performCreate(Activity.java:4465) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1919) ... 11 more This is the ZoomControls java file: package com.antlersoft.android.zoomer; import android.content.Context; import android.util.AttributeSet; import android.view.LayoutInflater; import android.view.MotionEvent; import android.view.View; import android.view.animation.AlphaAnimation; import android.widget.ImageButton; import android.widget.LinearLayout; import android.widget.ZoomButton; public class ZoomControls extends LinearLayout { private final ZoomButton mZoomIn; private final ZoomButton mZoomOut; private final ImageButton mZoomKeyboard; public ZoomControls(Context context) { this(context, null); } public ZoomControls(Context context, AttributeSet attrs) { super(context, attrs); setFocusable(false); LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); inflater.inflate(R.layout.zoom_controls, this, // we are the parent true); mZoomIn = (ZoomButton) findViewById(R.id.zoomIn); mZoomOut = (ZoomButton) findViewById(R.id.zoomOut); mZoomKeyboard = (ImageButton) findViewById(R.id.zoomKeys); } public void setOnZoomInClickListener(OnClickListener listener) { mZoomIn.setOnClickListener(listener); } public void setOnZoomOutClickListener(OnClickListener listener) { mZoomOut.setOnClickListener(listener); } public void setOnZoomKeyboardClickListener(OnClickListener listener) { mZoomKeyboard.setOnClickListener(listener); } /* * Sets how fast you get zoom events when the user holds down the * zoom in/out buttons. */ public void setZoomSpeed(long speed) { mZoomIn.setZoomSpeed(speed); mZoomOut.setZoomSpeed(speed); } @Override public boolean onTouchEvent(MotionEvent event) { /* Consume all touch events so they don't get dispatched to the view * beneath this view. */ return true; } public void show() { fade(View.VISIBLE, 0.0f, 1.0f); } public void hide() { fade(View.GONE, 1.0f, 0.0f); } private void fade(int visibility, float startAlpha, float endAlpha) { AlphaAnimation anim = new AlphaAnimation(startAlpha, endAlpha); anim.setDuration(500); startAnimation(anim); setVisibility(visibility); } public void setIsZoomInEnabled(boolean isEnabled) { mZoomIn.setEnabled(isEnabled); } public void setIsZoomOutEnabled(boolean isEnabled) { mZoomOut.setEnabled(isEnabled); } @Override public boolean hasFocus() { return mZoomIn.hasFocus() || mZoomOut.hasFocus(); } } This is the zoom_controls XML file: <merge xmlns:android="http://schemas.android.com/apk/res/android"> <ZoomButton android:id="@+id/zoomOut" android:background="@drawable/btn_zoom_down" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <ImageButton android:id="@+id/zoomKeys" android:background="@android:drawable/ic_dialog_dialer" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <ZoomButton android:id="@+id/zoomIn" android:background="@drawable/btn_zoom_up" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </merge>

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• WebCenter Marketing and Upcoming Events

  - by rituchhibber

  Events: Events: Date Event Name Location/Country October 30, 2012 ResCare Solves Content Lifecycle Challenges with Oracle WebCenter Webcast November 1, 2012 Paper Burying Your HR Processes? Dig Your Way Out With Oracle WebCenter! Webcast November 15, 2012 Social Business Thought Leader Webcast: Three Ways to Fix Your Broken Organization, featuring Christian Finn Webcast Marketing: Marketing: WebCenter Sites Sales eVite:Embrace the Base: Create an Exceptional Online Customer Experience with Oracle WebCenter Sites Directs recipients to the Connected Customer Experience Resource Center to see the latest demos, analyst reports, and customer webcasts promoting WebCenter Sites. For more information Click  here. WebCenter Social Business Thought Leaders Series: Digital Darwinism: How Brands Can Survive the Rapid Evolution of Society and TechnologyBrian Solis, Altimeter Group digital analyst and futuristDecember 13, 2012 10am PDTRegistration available soon, find other content from this speaker here. Webcast: WebCenter Sites for Applications: Disconnected Online Customer Experience? Connect it with Oracle WebCenter November 8, 2012  eVite | Registration Page WebCenter in Action Customer & Partner webcast series: Started earlier in FY13, a new webcast series featuring WebCenter customer deployments that are executed by a partner.The next webcast in the series will be November 14th:Los Angeles Department of Building & Safety Lowers Customer Service Costs with Oracle WebCenter Click here to learn more. OnDemand Webcast: ResCare Solves Content Lifecycle Challenges with Oracle WebCenterComplex documents must be created, assembled, reviewed, and tracked. To avoid fragmented, chaotic information processes, organizations must adopt an integrated set of strategies, standards, best practices, and technologies for managing information. Attend this webcast to learn how Oracle WebCenter has allowed ResCare to: solve content lifecycle challenges, reduce compliance and business risks and increase adoption of intranet as primary business communication tool. On-Demand Assets Date Event Name Location/Country On Demand Avoid Social Media Fatigue - Learn the 9 C’s of Customer Engagement, featuring Ray Wang, Principal Analyst and CEO, Constellation Research Webcast On Demand WebCenter in Action Series: Hitachi Data Systems Improves Global Web Experience with Oracle WebCenter, presented by Hitachi Data Systems and Lingotek. Webcast On Demand Managing Social Relationships for the Enterprise, featuring Jeremiah Owyang, Industry Analyst, Altimeter Group and Reggie Bradford, Vice President, Oracle Webcast On Demand Oracle’s Vision for the Social-Enabled Enterprise, presented by Mark Hurd, Thomas Kurian and Reggie Bradford Webcast On Demand WebCenter in Action Series: Qualcomm Provides a Seamless Experience for Customers with Oracle WebCenter, presented by Qualcomm and Keste. Webcast On Demand Social Business Thought Leaders Series: 6 Counterintuitive Best Practices for Social Collaboration Adoption, featuring John Brunswick, Oracle. Webcast On Demand Oracle WebCenter Connects Patients and Researchers in Cancer Control Mission, presented by Canadian Partnership Against Cancer and App-Systems Webcast On Demand Oracle WebCenter: Modernize, Aggregate and Extend Your Portals Webcast On Demand Top 10 Technology Trends Driving Business Innovation, featuring Andy Mulholland, CTO, Capgemini Webcast On Demand Ancestry.com Helps Families Uncover History with Oracl e WebCenter Webcast On Demand Organic Business Networks: Doing Business in a Hyper-Connected World, featuring Mike Fauscette, GVP, IDC Webcast On Demand Social Business and Innovation, featuring John Mancini, President, AIIM Webcast On Demand Do More with Oracle WebCenter: Expand Beyond Web Experience Management Webcast On Demand Race Against the Machine, featuring Andrew McAfee, author and principal scientist at MIT Webcast On Demand Introducing Oracle WebCenter Sites 11gR1: Transforming the Online Experience Webcast On Demand Mobile is the New Face of Engagement, featuring Ted Schadler, Vice President & Principal Analyst, Forrester Research Inc Webcast Analyst Report: IDC Research: Oracle Debuts New Release of Oracle WebCenter Sites.

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• Az Oracle üzleti intelligencia csomag Windows Server 2008-on is, a kliens Vista op.rsz-en is

  - by Fekete Zoltán

  Tegnap az Oracle BI Hands On rendezvényen felmerült a kérdés, hogy az Oracle Business Intelligence Enterprise Editon fut-e Windows Server 2008-on. A válasz: IGEN. Az Oracle BI EE fut a Windows Server 2008-on. Emellett a másik kérdésre a válasz: IGEN, a kliens lehet Windows Vista is. Mivel az Oracle BI szerver szoftver, amit egy böngészovel érnek el a felhasználók elemzési, lekérdezés/jelentés/riport- készítési feladatok elvégzésére, ezért az Oracle BI csak szerver operációs rendszerekre van bevizsgálva: Linux, Solaris, HP-UX, AIX és Windows platformokon. A jelenleg támogatott operációs rendszerek: Microsoft Windows 2000/2003 Server; Microsoft Windows Server 2008 Enterprise Edition x86 32 bit2 - Red Hat Enterprise Linux AS 4.x; Red Hat Enterprise Linux Server/Advanced Platform 5 - Novell SUSE 9.x - Oracle Enterprise Linux 4; Oracle Enterprise Linux 5 - Sun Solaris 9 SPARC 32 bit ; Sun Solaris 9 SPARC 64 bit; Sun Solaris 10 SPARC 32 bit; Sun Solaris 10 SPARC 64 bit - AIX 5.2 PowerPC 32 bit; AIX 5.2 PowerPC 64 bit; AIX 5.3 PowerPC 32 bit; AIX 5.3 PowerPC 64 bit; AIX 6.1 PowerPC 32 bit; AIX 6.1 PowerPC 64 bit - HP-UX 11.11 PA-RISC 64 bit; HP-UX 11.23 PA-RISC 64 bit; HP-UX 11.23 Itanium 64 bit; HP-UX 11.31 Itanium 64 bit A böngészos hozzáférést az irányítópultokhoz (dashboard), interaktív elemzo munkához használható operációs rendszerek: Windows, Vista, Linux, Solaris, Apple Mac OS 10.x.

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• How to use Dbmapper to generate JPA entity classes from DB script?

  - by Sourabh

  I am tring to use http://code.google.com/p/dbmapper/ and I am not sure how to run it frmo the command prompt. The sample usesege is like below Usage: com.moonspider.dbmap.GenerateConfig -type (-t) [String] The type to generate, either 'jpa' or 'gorm' (experimental) (jpa) -destinationDirectory (-d) [String] Destination directory -url [String] The url of the database -pkg (-package) [String] The target package () -user (-u) [String] Database user (sa) -password (-p) [String] Database password () -globalExtends (-extends) [String] Class for all Java classes to extend -globalImplements (-implements) [String] Class for all Java classes to implement -driver [String] Database drive class -extension (-ext) [String] File extension for the generated code (java) -hibernate [String] Generate hibernate.cfg.xml to this directory -jaxb [flag] Enable xml binding generation -schema [String] Specify the non-default schema to use How to run com.moonspider.dbmap.GenerateConfig from command line ?

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