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  • Can i write to data output stream after reading response from data input stream?

    - by Sirius
    Hi, i want to do a client-server activity like this: 1. first the client sends/writes to output stream 2. the server responses with some data that will be read with input stream 3. after receiving the data, the client sends/writes to output stream again to respond that the data has been received now, do i have to close the output stream and re-open it again before doing step no.3 ? also if someone could provide me with a snippet, it would be really helpful. thanks

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  • read ArrayList elements

    - by Jessy
    Why it print the wrong output? ArrayList<String> loc = new ArrayList<String>(); This arraylist stored the value of: [topLeft, topLeft, topLeft, bottomLeft, topLeft, bottomLeft, topLeft, topLeft, Left, topLeft] the firs index 0 is = topLeft if(loc.get(1)=="topLeft") System.out.println("same") else { System.out.println("not same") } This program print the wrong output not same instead of same

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  • Why doesnt R.raw.'songname' not work on android devices?

    - by James Rattray
    I have some media (Audio tracks) on an app... With file path 'R.raw.test' I use some code to get it into a mediaplayer... MediaPlayer.create(Textbox.this, R.raw.fly); And it works PERFECTLY on the Android Emulator... (Plays track on click of button) Can someone explain why, when I put it on my Archos (5 IT) it doesnt work at all? -As soon as the button is clicked, it crashes... Do you have to do something to file paths or what? Please help... Thanks alot... James

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  • Using Session Bean provided data on JSF welcome page

    - by takachgeza
    I use JSF managed beans calling EJB methods that are provide data from database. I want to use some data already on the welcome page of the application. What is the best solution for it? EJBs are injected into JSF managed beans and it looks like the injection is done after executing the constructor. So I am not able to call EJB methods in the constructor. The normal place for EJB call is in the JSF action methods but how to call such a method prior to loding the first page of the application? A possible solution would be to call the EJB method conditionally in a getter that is used on the welcome page, for example: public List getProductList(){ if (this.productList == null) this.productList = myEJB.getProductList(); return this.productList; } Is there any better solution? For example, in some config file?

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  • When are references declared in a switch statement?

    - by sandis
    To my surprise this code works fine: int i = 2; switch(i) { case 1: String myString = "foo"; break; case 2: myString = "poo"; System.out.println(myString); } But the String reference should never be declared? Could it be that all variables under every case always are declared no matter what, or how is this resolved?

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  • Remove robot as an editor of a blip

    - by Lee
    I have a Google Wave robot which makes changes to some blip content depending on what a user inputs. When this edit is made, the robot is listed in the blip as one of the people who have edited it (so shows its Avatar and robot name). I was wondering if anyone knew if it was possible (and if so how), to stop the robot being listed as an editor (either by it not happening in the first place, or removing it afterwards).

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  • How to draw/manage a hexagon grid?

    - by W.N.
    I've read this article: generating/creating hexagon grid in C . But look like both the author and answerer have already abandoned it. v(hexagonSide - hexagonWidth * hexagonWidth): What's hexagonSide and hexagonWidth? Isn't it will < 0 (so square root can't be calculated). And, can I put a hexagon into a rectangle? I need to create a grid like this: One more thing, how can I arrange my array to store data, as well as get which cells are next to one cell? I have never been taught about hexagon, so I know nothing about it, but I can easily learn new thing, so if you can explain or give me a clue, I may do it myself.

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  • How do I migrate a ManyToOne to a ManyToMany relationship in Hibernate?

    - by spderosso
    I have a instance field of a class X that is mapped using Hibernate as a Many to One relationship. E.g: public class X{ ... @ManyToOne(optional=false) private Y iField; ... } That is correctly working with a particular schema. I know want to change this instance field iField to a List and a Many to Many relationship. public class X{ ... @ManyToMany(optional=false) private List<Y> iField; ... } What steps should I follow? Do I have to change the schema? in which way? In case you need more info let me know. Thanks!

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  • Unable to change background colour for JOptionPane

    - by Sunil Kumar Sahoo
    Hi I have created sample progeam which will give same look and feel of a confirm dialog and set the background colour as red. But I donot know what is the problem that my background colour of option is displayed as the default colour but not red. also i need same look and feel of confirm dialog across all platforms. Here is the code that I have written. please help me to solve the issue public class JOptionPaneBackground { public static void main(String[] args) throws Exception { // UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName()); UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); UIDefaults uiDefaults = UIManager.getLookAndFeelDefaults(); List<Object> keys = new ArrayList<Object>(uiDefaults.keySet()); Collections.sort(keys, new Comparator<Object>() { public int compare(Object o1, Object o2) { return (o1.toString()).compareTo(o2.toString()); } }); for (Object key : keys) { System.out.println(String.format("%-40s = %s", key, uiDefaults.get(key))); } UIManager.put("OptionPane.background", Color.red); UIManager.put("Panel.background", Color.red); JOptionPane.showConfirmDialog(null, "Hello World!"); } }

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  • How can i setParth for new File use JFilechose , save dialog ?

    - by tiendv
    I have a dialog use Jfilechose, when i save a file by use FileOutputStream to create a file.txt to save in path which user want . But i have problem that it alway save in c:/user/Document Check my code DownLoadDialog downloadDialog = new DownLoadDialog(); int result = downloadDialog.showSaveDialog(queryPanel); if(result == downloadDialog.APPROVE_OPTION) { File file = downloadDialog.getSelectedFile(); //String parth =file.getPath(); //System.out.println(parth); //if(file.exists()) { // int response = JOptionPane.showConfirmDialog (null,"Overwrite existing file?","Confirm Overwrite",JOptionPane.OK_CANCEL_OPTION,JOptionPane.QUESTION_MESSAGE); // if(response == JOptionPane.OK_OPTION) {} //} else { if(resultGoogleSearch > 0) { { String parth = new File(downloadDialog.getSelectedFile().getAbsolutePath().concat(".txt")).toString(); System.out.println(parth); for(int i=0;i<resultGoogleSearch;i++) { String[] temp = googleSearchResult.get(i).split("<br>"); //String resultURL = temp[0]; //File dir = downloadDialog.getCurrentDirectory(); try{ FileOutputStream googleReuslt = new FileOutputStream( downloadDialog.getSelectedFile().getAbsolutePath()+".txt" ); OutputStreamWriter writer = new OutputStreamWriter(googleReuslt); BufferedWriter buffer = new BufferedWriter(writer); writer.write(temp[0]); writer.close(); buffer.close(); } catch (FileNotFoundException fEx){ } catch(IOException ioEx) { } } } JOptionPane.showMessageDialog(IDRSApplication.idrsJFrame, IDRSResourceBundle.res.getString("successful")); } problem is here : why can't i set parth for new file ? FileOutputStream googleReuslt = new FileOutputStream( downloadDialog.getSelectedFile().getAbsolutePath()+".txt" ); OutputStreamWriter writer = new OutputStreamWriter(googleReuslt); BufferedWriter buffer = new BufferedWriter(writer); writer.write(temp[0]); writer.close(); buffer.close();

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  • Jetty 7 Continuations: How to *not* redispatch the request?

    - by Don Werve
    I'm using Jetty 7 continuations to implement some asynchronous processing. What I'm trying to do is start off the continuation (via .suspend()), and then hand the continuation off to some other object that will compose the response, which works fine. But Jetty keeps redispatching the response (with isInitial = false) to the servlet, and I don't want or need that, because the response is being dealt with by some other object. So, I'd like to find a way to explicitly not redispatch the request on timeout or expire, because I'm using an event-driven series of callbacks to actually produce the response.

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  • Delete files from blobstore using file serving URL

    - by Arturo
    In my app (GWT on GAE) we are storing on our database the serving URL that is stored on blobstore. When user selects one of these files and clicks "delete", we need to delete the file from blobstore. This is our code, but it is not deleting the file at all: public void remove(String fileURL) { BlobstoreService blobstoreService = BlobstoreServiceFactory.getBlobstoreService(); String key = getBlobKeyFromURL(box.getImageURL()); BlobKey blobKey = new BlobKey(key); blobstoreService.delete(blobKey); } Where fileURL looks like this: http://lh6.ggpht.com/d5VC0ywISACeJRiC3zkzaZug-tPsaI_LGt93-e_ATGTCwnGLao4yTWjLVppQ And getBlobKeyFromURL() would return what is after the last "/", in this example: d5VC0ywISACeJRiC3zkzaZug-tPsaI_LGt93-e_ATGTCwnGLao4yTWjLVppQ Could you please advice? Thanks

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  • Beginner: Restore previously serialized JFrame-object, how?

    - by elementz
    Hi all. I have managed to serialize my very basic GUI-object containing a JTextArea and a few buttons to a file 'test.ser'. Now, I would like to completely restore the previously saved state from 'test.ser', but seem to have a misconception of how to properly deserialize an objects state. The class MyFrame creates the JFrame and serializes it. Now I tried to deserialize like so: public class Deserialize { static Deserialize ds; MyFrame frame; public static void main(String[] args) { try { ds.deserialize(); } catch (ClassNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } } public void deserialize() throws ClassNotFoundException { try { ObjectInputStream ois = new ObjectInputStream(new FileInputStream("test.ser")); frame = (MyFrame) ois.readObject(); ois.close(); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } Maybe somebody could point me into the direction where my misconception is? Thx in advance!

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  • what pattern to use for multi-argument method?

    - by Omid S
    I have a method with the following signature: foo (Sample sample, Aliquot aliquot) "foo" needs to alter a Sample object, either the first argument or from the second argument it can extract its Sample. For example: foo (Sample sample, Aliquot aliquot) { Sample out = null; if (sample != null) out = sample else out = aliquot.getSample() return out; } But that is so un-elegant, other than reading the API a developer does not know the reference of the first argument overrides the Sample of the second argument. Now, I could change "foo" to foo (SomeMagicalObject bar) where SomeMagicalObject is a tuple for Sample and Aliquot and holds some logic ... etc. But I am wondering, are there some patterns for this question?

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  • How to sett up hibernate to use Glassfish connection pool?

    - by jschoen
    I have set up a connection pool in Glassfish with a jndi resource for it also setup. I am stumped on how to configure hibernate to go get it. I have come across alot of write ups to configure it to use C3P0 connection pool. Well I am lost. I found that I need to set: hibernate.connection.datasource hibernate.jndi.url hibernate.jndi.class hibernate.connection.username hibernate.connection.password Would datasource be the same as the hibernate.connection.datasource set in the connection pool? What would hibernate.jndi.class be? Are hibernate.connection.username and hibernate.connection.password for the connection to the database or to the appserver? I assume this is to the database, but why do I need them since that is all set in the appserver?

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  • Is it possible to put GWT application on vkonakte.ru?

    - by Vasil Remeniuk
    Hi, Does anyone know if it's possible to put GWT application on vkontakte.ru (for the note, it's the most popular social networking site for the russian-speaking audience, 75+ mln subscribers). I know that integration with Facebook is possible, but as long as vkontakte.ru is not a direct Facebook-clone (they use different engines), I'm not sure, the same integration scenario will work for vkontakte. Thanks in advance!

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  • Blackberry apps: Native or webapps?

    - by jpartogi
    Dear all, I have read the Blackberry documentation and it is possible to push a notification from a webapp. I am planning to create a Blackberry application that compliments to our webapps. But I am still left in the middle whether to develop a webapp or native Blackberry app. I have also look at how a webapp runs on Blackberry browser and it looks smooth. From your experience does the native app offer something that the webapp doesn't? Bonus question, is Facebook and Twitter app on Blackberry a native app or a webapp? If it is a webapp, is it possible to make a launcher for the application on Blackberry? Thanks for your help.

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  • How should I read from a buffered reader?

    - by Roman
    I have the following example of reading from a buffered reader: while ((inputLine = input.readLine()) != null) { System.out.println("I got a message from a client: " + inputLine); } The code in the loop println will be executed whenever something appears in the buffered reader (input in this case). In my case, if a client-application writes something to the socket, the code in the loop (in the server-application) will be executed. But I do not understand how it works. inputLine = input.readLine() waits until something appears in the buffered reader and when something appears there it returns true and the code in the loop is executed. But when null can be returned. There is another question. The above code was taken from a method which throws Exception and I use this code in the run method of the Thread. And when I try to put throws Exception before the run the compiler complains: overridden method does not throw exception. Without the throws exception I have another complain from the compiler: unreported exception. So, what can I do?

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  • Spring bean creation via deserialization

    - by mdma
    Spring has many different ways of creating beans, but is it possible to create a bean by deserializing a resource? My application has a number of Components, and each manipulates a certain type of data. During test, the data object is instantiated directly and set directly on the component, e.g. component.setData(someDataObject). At runtime, the data is available as a serialized object and read in from the serialized stream by the component. Rather than having each component explicitly deserialize it's data from the stream, it would be more consistent and flexible to have Spring deserialize the data object from a resource. Is there a DeserializerBeanFactory or something similar?

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  • Constructor versus setter injection

    - by Chris
    Hi, I'm currently designing an API where I wish to allow configuration via a variety of methods. One method is via an XML configuration schema and another method is through an API that I wish to play nicely with Spring. My XML schema parsing code was previously hidden and therefore the only concern was for it to work but now I wish to build a public API and I'm quite concerned about best-practice. It seems that many favor javabean type PoJo's with default zero parameter constructors and then setter injection. The problem I am trying to tackle is that some setter methods implementations are dependent on other setter methods being called before them in sequence. I could write anal setters that will tolerate themselves being called in many orders but that will not solve the problem of a user forgetting to set the appropriate setter and therefore the bean being in an incomplete state. The only solution I can think of is to forget about the objects being 'beans' and enforce the required parameters via constructor injection. An example of this is in the default setting of the id of a component based on the id of the parent components. My Interface public interface IMyIdentityInterface { public String getId(); /* A null value should create a unique meaningful default */ public void setId(String id); public IMyIdentityInterface getParent(); public void setParent(IMyIdentityInterface parent); } Base Implementation of interface: public abstract class MyIdentityBaseClass implements IMyIdentityInterface { private String _id; private IMyIdentityInterface _parent; public MyIdentityBaseClass () {} @Override public String getId() { return _id; } /** * If the id is null, then use the id of the parent component * appended with a lower-cased simple name of the current impl * class along with a counter suffix to enforce uniqueness */ @Override public void setId(String id) { if (id == null) { IMyIdentityInterface parent = getParent(); if (parent == null) { // this may be the top level component or it may be that // the user called setId() before setParent(..) } else { _id = Helpers.makeIdFromParent(parent,getClass()); } } else { _id = id; } } @Override public IMyIdentityInterface getParent() { return _parent; } @Override public void setParent(IMyIdentityInterface parent) { _parent = parent; } } Every component in the framework will have a parent except for the top level component. Using the setter type of injection, then the setters will have different behavior based on the order of the calling of the setters. In this case, would you agree, that a constructor taking a reference to the parent is better and dropping the parent setter method from the interface entirely? Is it considered bad practice if I wish to be able to configure these components using an IoC container? Chris

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  • XML parsing by DOM

    - by blackpearl
    NodeList nList2 = doc.getElementsByTagName("dep"); Map<String, List<Map<String, String>>> depMap = new HashMap<String, List<Map<String, String>>>(); for (int temp = 0; temp < nList2.getLength(); temp++) { Element el = (Element)nList2.item(temp); String type=el.getAttribute("type"); Node nNode = nList2.item(temp); if (nNode.getNodeType() == Node.ELEMENT_NODE) { Element eElement = (Element) nNode; List<Map<String,String>> depList = new ArrayList<Map<String,String>>(); String governor = getTagValue("governor", eElement); String dependent = getTagValue("dependent", eElement); Map<String, String> govdepmap = new HashMap<String, String>(); govdepmap.put(governor, dependent); depList.add(govdepmap); List<Map<String,String>> flist = new ArrayList<Map<String,String>>(); flist.add(govdepmap); depMap.put(type, flist); } } I have the following structure in my XML file: going I Now i want to store the "idx" attribute of each "governor" and "dependent" tag. What code should I change or add?

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  • standardize international phone no. code using only regex

    - by DarkFox
    Sipdroid on Android has a search & replace method, that uses regex. I'm trying to use it to make sure all outgoing calls has a country code in the format 00XX I also want it to put 0045 in front of the number, if no country code is present. The first one, I have solved, but I can't figure out how to do the second thing. Search: \A(((\+)(\d{2})?)|(00(\d{2})?)|)((\d|\s)+)\Z Replace: 00$4$6$7 I'm using http://www.regexplanet.com/simple/index.html to test it, with the test strings: "12345678", "+4512345678" and "004512345678" They should all return "004512345678".

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