Search Results

Search found 32961 results on 1319 pages for 'java 8'.

Page 691/1319 | < Previous Page | 687 688 689 690 691 692 693 694 695 696 697 698  | Next Page >

  • Lazy-loading with Spring HibernateDaoSupport ?

    - by umanga
    Greetings I am developing a non-webapplication using Spring+Hibernate. My question is how the HibernateDaoSupport handles lazy-loading , because after a call do DAO , the Session is closed. Take a look at following psuedo-code: DAO is like: CommonDao extends HibernateDaoSupport{ Family getFamilyById(String id); SubFamily getSubFamily(String familyid,String subfamilyid); } Domain model is like: Family{ private List<SubFamily> subfamiles; public List<SubFamily> getSubFamiles(); } SubFamily{ private Family family; public Family getFamily(); } In the application I get DAO from app-context and want to following operations.Is this possible to do with lazy-loading because AFAIK after every method (getFamilyById() , getSubFamily() ) the session is closed. CommonDAO dao=//get bean from application context; Family famA=dao.getFamilyById(familyid); // //Do some stuff List<SubFamily> childrenA=fam.getSubFamiles(); SubFamily asubfamily=dao.getSubFamily(id,subfamilyid); // //Do some other stuff Family famB=asubfamily.getFamily();

    Read the article

  • Remove duplicates from a sorted ArrayList while keeping some elements from the duplicates

    - by js82
    Okay at first I thought this would be pretty straightforward. But I can't think of an efficient way to solve this. I figured a brute force way to solve this but that's not very elegant. I have an ArrayList. Contacts is a VO class that has multiple members - name, regions, id. There are duplicates in ArrayList because different regions appear multiple times. The list is sorted by ID. Here is an example: Entry 0 - Name: John Smith; Region: N; ID: 1 Entry 1 - Name: John Smith; Region: MW; ID: 1 Entry 2 - Name: John Smith; Region: S; ID: 1 Entry 3 - Name: Jane Doe; Region: NULL; ID: 2 Entry 4 - Name: Jack Black; Region: N; ID: 3 Entry 6 - Name: Jack Black; Region: MW; ID: 3 Entry 7 - Name: Joe Don; Region: NE; ID: 4 I want to transform the list to below by combining duplicate regions together for the same ID. Therefore, the final list should have only 4 distinct elements with the regions combined. So the output should look like this:- Entry 0 - Name: John Smith; Region: N,MW,S; ID: 1 Entry 1 - Name: Jane Doe; Region: NULL; ID: 2 Entry 2 - Name: Jack Black; Region: N,MW; ID: 3 Entry 3 - Name: Joe Don; Region: NE; ID: 4 What are your thoughts on the optimal way to solve this? I am not looking for actual code but ideas or tips to go about the best way to get it done. Thanks for your time!!!

    Read the article

  • for my project I have problem in report

    - by pink rose
    public stack(int size) { this.size=size; Array = new int[size]; } public void push(int j) { if (top < size) { Array[++top] = j; } } public int pop() { return Array[top--]; } public int top() { return Array[top]; } public boolean isEmpty() { return (top == -1); } } import javax.swing.JOptionPane; public class menu { private static stack s; private static int numbers[]; public static void main(String args[]) { start(); } public static void start() { int i = Integer.parseInt(JOptionPane.showInputDialog("1. size of array\n2. data entry\n3. display content\n4. exit")); switch (i) { case 1: setSize(); break; case 2: addElement(); break; case 3: showElements(); break; case 4: exit(); } } public static void setSize() { int size = Integer.parseInt(JOptionPane.showInputDialog("Please Enter The Size")); s = new stack(size); numbers = new int[10]; start(); } public static void addElement() { for(int x=0;x<s.size;x++) { int e = Integer.parseInt(JOptionPane.showInputDialog("Please Enter The Element")); numbers[e]++; s.push(e); } start(); } public static void showElements() { String result = ""; int temp; while (!s.isEmpty()) { temp = s.pop(); if (numbers[temp] == 1) { result = temp+result; } } JOptionPane.showMessageDialog(null, result); start(); } public static void exit() { System.exit(0); } } This my project I was finished but I have problem in question in my report Conclusion. It should summarize the state of your project and indicate which part of your project is working and which part is not working or with limitations. You may also provide your suggestions and comments to this project what I can answer I didn't have any idea

    Read the article

  • Background Image in JTextPane

    - by Nivas
    How do I set a background image to a JTextPane - some sort of a watermark. I tried this option - creating a child class of JTextPane and use the paint method to draw the image. But then the text is displayed "below" the image than above. Is there any "standard" or "well known" way to do this? (BTW, I tried (something silly?) making the content type "text/html", and setting the image as the background image of a <div> but it did not help.)

    Read the article

  • save xml object so that elements are in sorted order in saved xml file

    - by scot
    Hi , I am saving a xml document object and it is saved in a xml file as shown below . <author name="tom" book="Fun-II"/> <author name="jack" book="Live-I"/> <author name="pete" book="Code-I"/> <author name="jack" book="Live-II"/> <author name="pete" book="Code-II"/> <author name="tom" book="Fun-I"/> instead i want to sort the content in document object so that when i persist the object it is saved by grouping authors then book name as below: <author name="jack" book="Live-I"/> <author name="jack" book="Live-II"/> <author name="pete" book="Code-I"/> <author name="pete" book="Code-II"/> <author name="tom" book="Fun-I"/> <author name="tom" book="Fun-II"/> I use apache xml beans..any ideas on how to achieve this? thanks.

    Read the article

  • How to improve the builder pattern?

    - by tangens
    Motivation Recently I searched for a way to initialize a complex object without passing a lot of parameter to the constructor. I tried it with the builder pattern, but I don't like the fact, that I'm not able to check at compile time if I really set all needed values. Traditional builder pattern When I use the builder pattern to create my Complex object, the creation is more "typesafe", because it's easier to see what an argument is used for: new ComplexBuilder() .setFirst( "first" ) .setSecond( "second" ) .setThird( "third" ) ... .build(); But now I have the problem, that I can easily miss an important parameter. I can check for it inside the build() method, but that is only at runtime. At compile time there is nothing that warns me, if I missed something. Enhanced builder pattern Now my idea was to create a builder, that "reminds" me if I missed a needed parameter. My first try looks like this: public class Complex { private String m_first; private String m_second; private String m_third; private Complex() {} public static class ComplexBuilder { private Complex m_complex; public ComplexBuilder() { m_complex = new Complex(); } public Builder2 setFirst( String first ) { m_complex.m_first = first; return new Builder2(); } public class Builder2 { private Builder2() {} Builder3 setSecond( String second ) { m_complex.m_second = second; return new Builder3(); } } public class Builder3 { private Builder3() {} Builder4 setThird( String third ) { m_complex.m_third = third; return new Builder4(); } } public class Builder4 { private Builder4() {} Complex build() { return m_complex; } } } } As you can see, each setter of the builder class returns a different internal builder class. Each internal builder class provides exactly one setter method and the last one provides only a build() method. Now the construction of an object again looks like this: new ComplexBuilder() .setFirst( "first" ) .setSecond( "second" ) .setThird( "third" ) .build(); ...but there is no way to forget a needed parameter. The compiler wouldn't accept it. Optional parameters If I had optional parameters, I would use the last internal builder class Builder4 to set them like a "traditional" builder does, returning itself. Questions Is this a well known pattern? Does it have a special name? Do you see any pitfalls? Do you have any ideas to improve the implementation - in the sense of fewer lines of code?

    Read the article

  • Button inside text box

    - by user542719
    My code shows a button inside a textbox, but when the input value changes, the size of the text box also changes. That I don't like. Is there any solution such that the textbox size remains fixed? Or any other idea on how to create a button inside textbox? The following is my code: JPanel panel = new JPanel(); panel.setLayout( new FlowLayout(FlowLayout.CENTER, 0, 0) ); panel.add(textField); panel.add(button); panel.setBackground( textField.getBackground() ); panel.setBorder( textField.getBorder() ); textField.setBorder(null);

    Read the article

  • Call stored procedure using Spring SimpleJdbcCall with callback

    - by MFIhsan
    I have an Oracle Stored procedure that takes CLOB input and REFCURSOR output. I invoke the SP via Spring SimpleJdbcCall passing in a RowMapper to map the results. However, since the result set is large, I need to provide callback feature to the client. I can't quite figure out how to add callback for an SP call using Spring - both with and without SimpleJdbcCall. One thought I have is to pass-in a RowCallbackHandler. Will this work or is there a better way to solve this problem? Any help here is appreciated. private Map<String, Object> arguments = ...; SimpleJdbcCall jdbcCall = new SimpleJdbcCall(this.jdbcTemplate) .withCatalogName(this.packageName) .withProcedureName(this.storedProcName) .withoutProcedureColumnMetaDataAccess() .declareParameters(this.outputParameters.toArray(new SqlOutParameter[]{})); if(!isEmpty(inputParameters)) { jdbcCall.declareParameters(inputParameters.toArray(new SqlParameter[]{})); } this.outputParameters.add(new SqlOutParameter(outputParamName, VARCHAR, rowMapper)); jdbcCall.execute(arguments);

    Read the article

  • lwjgl 101: How can I write the basics?

    - by Vuntic
    This ought to be really simple, but I cannot for the life of me figure out how to compile anything with lwjgl and have it work. I can write something like package gwison; import org.lwjgl.Sys; public class G { public static void main(String[] args) { System.out.println(Sys.getTime()); } } and I can easily compile a program with several classes in different packages, as long as I wrote all the classes myself. But I have no clue how to make G work. I think it has something to do with classpathes? Maybe? Help?

    Read the article

  • Best tools to monitor Tomcat

    - by Pier Luigi
    Hi all, I'm searching free tools for monitor tomcat (traffic, memory usage, threads, requests, CPU, logs,...). I'm currently using lambdaprobe on Tomcat 5.5.x, but it seems that is no more developed (or not? the site lambdaprobe.org is always down for me...). Has someone good experiences to share? In lambdaprobe there are some info available only if tomcat is instrumented with JMX. Well, JMX is something of strange and mysterious for me. Is a good solution in a production server? It's worth to spend my (little) time to learn it?

    Read the article

  • How to programatically set drawableLeft on Android button?

    - by Frank LoVecchio
    I'm dynamically creating buttons. I styled them using XML first, and I'm trying to take the XML below and make it programattic. <Button android:id="@+id/buttonIdDoesntMatter" android:layout_height="wrap_content" android:layout_width="fill_parent" android:text="buttonName" android:drawableLeft="@drawable/imageWillChange" android:onClick="listener" android:layout_width="fill_parent"> </Button> This is what I have so far. I can do everything but the drawable. linear = (LinearLayout) findViewById(R.id.LinearView); Button button = new Button(this); button.setText("Button"); button.setOnClickListener(listener); button.setLayoutParams( new LayoutParams( android.view.ViewGroup.LayoutParams.FILL_PARENT, android.view.ViewGroup.LayoutParams.WRAP_CONTENT ) ); linear.addView(button);

    Read the article

  • How to schedule multiple jobs in quartz scheduler using same trigger?

    - by aquero
    Hi, I am using quartz scheduler in my spring project. I have to run a job after another job which is scheduled to run in every 15 mins? I cant run this job concurrently as both of this jobs have to access same mail account using different protocols(one to send:smtp and other to receive: imap) and it may cause problems. Please reply quickly, as its an urgent requirement.

    Read the article

  • Algorithm for analyzing text of words

    - by Click Upvote
    I want an algorithm which would create all possible phrases in a block of text. For example, in the text: "My username is click upvote. I have 4k rep on stackoverflow" It would create the following combinations: "My username" "My Username is" "username is click" "is click" "is click upvote" "click upvote" "i have" "i have 4k" "have 4k" .. You get the idea. Basically the point is to get all possible combinations of 'phrases' out of a sentence. Any thoughts for how to best implement this?

    Read the article

  • ant task to remove files from a jar

    - by bguiz
    Hi, How to write an ant task that removes files from a previously compiled JAR? Let's say the files in my JAR are: aaa/bbb/ccc/Class1 aaa/bbb/ccc/Class2 aaa/bbb/def/Class3 aaa/bbb/def/Class4 ... and I want a version of this JAR file without the aaa.bbb.def package, and I need to strip it out using ant, such that I end up with a JAR that contains: aaa/bbb/ccc/Class1 aaa/bbb/ccc/Class2 Thanks!

    Read the article

  • using Spring JdbcTemplate for multiple database operations

    - by Joel Carranza
    I like the apparent simplicity of JdbcTemplate but am a little confused as to how it works. It appears that each operation (query() or update()) fetches a connection from a datasource and closes it. Beautiful, but how do you perform multiple SQL queries within the same connection? I might want to perform multiple operations in sequence (for example SELECT followed by an INSERT followed by a commit) or I might want to perform nested queries (SELECT and then perform a second SELECT based on result of each row). How do I do that with JdbcTemplate. Am I using the right class?

    Read the article

  • How to set 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?

    Read the article

  • algorithm to combinatorics

    - by peiska
    I am trying to solve a combinatorics problem, it seems easy, but i am having some trouble with it. If i have at most X tables, and N persons to sit on the tables, Each table can have 1 to N seating places, and I can only sit persons in one side of a rectangular table( so the order how people sit matters). I want to make a code that can calculate all the distributions of seating places from 1 up to K tables. For example, if I have 12 persons and 1 table i have 479001600 ways of seating persons( thats easy to calculate I've used Factorial of 12). But if I have 12 persons and 3 tables i have 4390848000 ways of seating persons. I've tried different solutions but i was not able to find the correct one. I've tried to divided the 12 in 3, then o use factorial of the result (it didnt work), i've tried to use 12! * 3( it didn't work too). Can some one give me a tip in a algorithm that i can use?

    Read the article

  • log4j category

    - by Nuno Furtado
    I have the following on my log4j.properties log4j.rootLogger = debug, stdout, fileLog log4j.appender.stdout = org.apache.log4j.ConsoleAppender log4j.appender.fileLog = org.apache.log4j.RollingFileAppender log4j.appender.fileLog.File = C:/logs/services.log log4j.appender.fileLog.MaxFileSize = 256MB log4j.appender.fileLog.MaxBackupIndex = 32 #Category: ConsultaDados log4j.category.ConsultaDados=ConsultaDados log4j.appender.ConsultaDados=org.apache.log4j.DailyRollingFileAppender log4j.appender.ConsultaDados.layout=org.apache.log4j.PatternLayout log4j.appender.ConsultaDados.layout.ConversionPattern={%t} %d - [%p] %c: %m %n log4j.appender.ConsultaDados.file=C:/logs/consulta.log log4j.appender.ConsultaDados.DatePattern='.' yyyy-MM-dd-HH-mm And im creating my logger with : myLogger = Logger.getLogger("ConsultaDados"); But this doesnt log my calls to the file. they get thrown into the rootLogger Any ideas?

    Read the article

  • Encoding issues with Spring and Freemarker

    - by Cameron
    I'm working on a project using Freemarker and Spring running on Jetty. It will involve displaying characters from many different countries so I'm trying to set the encoding to UTF-8. However, no matter what I do, it remains ISO-8859-1. I tried to create a filter in my web.xml and I've tried putting this response.setCharacterEncoding("UTF-8"); response.setContentType("text/html; charset=utf-8"); just before rendering the view. But when I load the page and click "View Page Info", the encoding is always ISO-8859-1. I've also tried hitting my app server directly to see if it was being affected by Apache but got the same result. Any help is appreciated.

    Read the article

  • How to mark that a lgpl library is modified

    - by David Göransson
    I am using an LGPL library in my code. For my needs, I need to modify the code in the library. How do I mark the jar file that it contains modified code? Some txt file in the jar? In that case, what do I write in the txt file? I will include in the license agreement that we are distributing a modified version of the jar, but my question is about marking the jar itself.

    Read the article

  • Psuedo-Backwards Builder Pattern?

    - by Avid Aardvark
    In a legacy codebase I have a very large class with far too many fields/responsibilities. Imagine this is a Pizza object. It has highly granular fields like: hasPepperoni hasSausage hasBellPeppers I know that when these three fields are true, we have a Supreme pizza. However, this class is not open for extension or change, so I can't add a PizzaType, or isSupreme(), etc. Folks throughout the codebase duplicate the same "if(a && b && c) then isSupreme)" logic all over place. This issue comes up for quite a few concepts, so I'm looking for a way to deconstruct this object into many subobjects, e.g. a pseudo-backwards Builder Pattern. PizzaType pizzaType = PizzaUnbuilder.buildPizzaType(Pizza); //PizzaType.SUPREME Dough dough = PizzaUnbuilder.buildDough(Pizza); Is this the right approach? Is there a pattern for this already? Thanks!

    Read the article

  • What does seem target in ANT

    - by Johannes
    Hello I am completly new to eclipse, liferay and ANT. I tried to set up a development environment and just finished the ext-anvironment (I also executed ant clean start). Now I've to execute "ant build-ext", following this tutorial: http://www.liferay.com/web/guest/community/wiki/-/wiki/Main/Setting%20up%20the%20Extension%20Environment D:\_liferay\ext>ant build-ext Buildfile: D:\_liferay\ext\build.xml But I receive the Message: BUILD FAILED Target "build-ext" does not exist in the project "ext". Can somebody tell me what I did wrong? Thanks in Advance Johannes

    Read the article

  • Are there any working implementations of the rolling hash function used in the Rabin-Karp string sea

    - by c14ppy
    I'm looking to use a rolling hash function so I can take hashes of n-grams of a very large string. For example: "stackoverflow", broken up into 5 grams would be: "stack", "tacko", "ackov", "ckove", "kover", "overf", "verfl", "erflo", "rflow" This is ideal for a rolling hash function because after I calculate the first n-gram hash, the following ones are relatively cheap to calculate because I simply have to drop the first letter of the first hash and add the new last letter of the second hash. I know that in general this hash function is generated as: H = c1ak - 1 + c2ak - 2 + c3ak - 3 + ... + cka0 where a is a constant and c1,...,ck are the input characters. If you follow this link on the Rabin-Karp string search algorithm , it states that "a" is usually some large prime. I want my hashes to be stored in 32 bit integers, so how large of a prime should "a" be, such that I don't overflow my integer? Does there exist an existing implementation of this hash function somewhere that I could already use? Here is an implementation I created: public class hash2 { public int prime = 101; public int hash(String text) { int hash = 0; for(int i = 0; i < text.length(); i++) { char c = text.charAt(i); hash += c * (int) (Math.pow(prime, text.length() - 1 - i)); } return hash; } public int rollHash(int previousHash, String previousText, String currentText) { char firstChar = previousText.charAt(0); char lastChar = currentText.charAt(currentText.length() - 1); int firstCharHash = firstChar * (int) (Math.pow(prime, previousText.length() - 1)); int hash = (previousHash - firstCharHash) * prime + lastChar; return hash; } public static void main(String[] args) { hash2 hashify = new hash2(); int firstHash = hashify.hash("mydog"); System.out.println(firstHash); System.out.println(hashify.hash("ydogr")); System.out.println(hashify.rollHash(firstHash, "mydog", "ydogr")); } } I'm using 101 as my prime. Does it matter if my hashes will overflow? I think this is desirable but I'm not sure. Does this seem like the right way to go about this?

    Read the article

< Previous Page | 687 688 689 690 691 692 693 694 695 696 697 698  | Next Page >