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java Programming Glossary: amHow to sort a Map<Key, Value> on the values in Java? http://stackoverflow.com/questions/109383/how-to-sort-a-mapkey-value-on-the-values-in-java to sort a Map Key Value on the values in Java I am relatively new to Java and often find that I need to sort a..
What is a Null Pointer Exception? http://stackoverflow.com/questions/218384/what-is-a-null-pointer-exception a variable of primitive type int int x x 10 In this example the variable x is an int and Java will initialize it to 0.. num num new Integer 10 The first line declares a variable named num but it does not contain a primitive value. Instead it.. say as yet what to point to Java sets it to null meaning I am pointing at nothing . In the second line the new keyword is..
How to call SOAP web service in Android http://stackoverflow.com/questions/297586/how-to-call-soap-web-service-in-android to call SOAP web service in Android I am having a lot of trouble finding good information on how to call..
Download a file with Android, and showing the progress in a ProgressDialog http://stackoverflow.com/questions/3028306/download-a-file-with-android-and-showing-the-progress-in-a-progressdialog Android and showing the progress in a ProgressDialog I am trying to write a simple application that gets updated. For.. some background processes and update the UI at the same time in this case we'll update a progress bar . This is an.. in this case we'll update a progress bar . This is an example code declare the dialog as a member field of your activity..
How do servlets work? Instantiation, session variables and multithreading http://stackoverflow.com/questions/3106452/how-do-servlets-work-instantiation-session-variables-and-multithreading which holds numerous servlets. For information passing among those servlets I am getting the servlet context and setting.. servlets. For information passing among those servlets I am getting the servlet context and setting session variables. Now.. whose url pattern matches the request URL all in the same thread. The request object provides access to all information..
What are the pros and cons of the leading Java HTML parsers? http://stackoverflow.com/questions/3152138/what-are-the-pros-and-cons-of-the-leading-java-html-parsers gives you the possibility to act like a webbrowser programmatically. I.e. enter form values click elements invoke JavaScript.. curve and it can end up to be still verbose. Here's an example which uses a plain W3C DOM parser like JTidy in combination.. to extract the first paragraph of your question and the names of all answerers I am using XPath since without it the code..
Evaluating a math expression given in string form http://stackoverflow.com/questions/3422673/evaluating-a-math-expression-given-in-string-form a math expression given in string form I am trying to write a Java routine to evaluate simple math expressions.. to evaluate simple math expressions from String s. Example strings 5 3 or 10 40 or 10 3 I want to avoid a lot of if.. ScriptEngineManager ScriptEngine engine mgr.getEngineByName JavaScript String foo 40 2 System.out.println engine.eval foo..
Design Patterns web based applications http://stackoverflow.com/questions/3541077/design-patterns-web-based-applications Patterns web based applications I am designing a simple web based application. I am new to this web.. I am designing a simple web based application. I am new to this web based domain.I needed your advice regarding.. patterns like how responsibility should be distributed among Servlets criteria to make new Servlet etc. Actually I have..
Generating random numbers in a range with Java http://stackoverflow.com/questions/363681/generating-random-numbers-in-a-range-with-java random numbers in a range with Java I am trying to generate a random number with Java but random in a.. number with Java but random in a specific range. For example my range is 5 10 meaning that 5 is the smallest possible.. Min This returns a value in the range 0 Max Min . For example if you want 5 10 you need to cover five integer values so..
http://stackoverflow.com/questions/3954616/java-look-and-feel-lf Look and Feel L F I am developing a desktop application with Java Swing for my personal.. desktop application with Java Swing for my personal use.I am in need of some beautiful Look and Feel for my application...
Calling awt Frame methods from subclass http://stackoverflow.com/questions/5665156/calling-awt-frame-methods-from-subclass awt Frame methods from subclass This question is about Frames Java and.. awt Frame methods from subclass This question is about Frames Java and Processing . This questions sounds pretty convoluted.. to a simple minimum. I'm creating a small ball in a maze game to get my head around physics and rendering. It's been a good..
Creating a custom button in Java with JButton http://stackoverflow.com/questions/5751311/creating-a-custom-button-in-java-with-jbutton a custom button in Java with JButton I am trying to create a button that has a custom shape hexagon but..
Java GUI listeners without AWT http://stackoverflow.com/questions/6255106/java-gui-listeners-without-awt GUI listeners without AWT I am a starting Java developer learning just from internet tutorials... Java developer learning just from internet tutorials. I am learning full screen GUI applications. I was told yesterday.. I was told yesterday that I shouldn't use AWT in my programs because it is outdated. I already know about light and heavyweight..
http://stackoverflow.com/questions/9864267/load-icon-image-exception Icon Image Exception I am having a error for my GUI. Trying to set title bar icon then.. icon.gif catch IOException e e.printStackTrace frame.setIconImage image Here is the error I am getting Exception.. frame.setIconImage image Here is the error I am getting Exception in thread main java.lang.IllegalArgumentException..
Java 256-bit AES Password-Based Encryption http://stackoverflow.com/questions/992019/java-256-bit-aes-password-based-encryption I need to implement 256 bit AES encryption but all the examples I have found online use a KeyGenerator to generate a 256.. not bits which is too long. The following is some code I am using now that I have some more experience with this. byte key.. cipher.init Cipher.ENCRYPT_MODE secret AlgorithmParameters params cipher.getParameters byte iv params.getParameterSpec..
How to maintain JTable cell rendering after cell edit http://stackoverflow.com/questions/10067060/how-to-maintain-jtable-cell-rendering-after-cell-edit the new values but this unfortunately did not work... Am I missing something... Obviously but what java swing jtable.. DefaultTableModel model new DefaultTableModel new String Amount 0 @Override public Class getColumnClass int columnIndex..
Dynamic Graphics Object Painting In Java http://stackoverflow.com/questions/10628492/dynamic-graphics-object-painting-in-java call Since the paint method is the only one I can call . Am I going about this completely wrong Never bothered with this..
http://stackoverflow.com/questions/115835/what-is-the-best-method-to-capture-images-from-a-live-video-device-for-use-by-a how much trouble is it to hook this solution to my code Am I sending packets over a socket Hitting URLs Installing Direct3D..
non resizable window border and positioning http://stackoverflow.com/questions/12529200/non-resizable-window-border-and-positioning bounds.x bounds.width bounds.y frame2.setVisible true Am I doing something wrong or is this a bug How can I display 2..
Converting ISO8601-compliant String to java.util.Date http://stackoverflow.com/questions/2201925/converting-iso8601-compliant-string-to-java-util-date date which obviously isn't that nice. Am I missing something or is there a better solution answer Thanks..
Why does (360 / 24) / 60 = 0 … in Java http://stackoverflow.com/questions/2475652/why-does-360-24-60-0-in-java 60 System.out.println div This prints out 0.0 Why is that Am I doing something really stupid or is there a good reason for..
How to limit setAccessible to only “legitimate” uses? http://stackoverflow.com/questions/2481862/how-to-limit-setaccessible-to-only-legitimate-uses s Hello world mutate s System.out.println s HELLO WORLD Am I the only one who thinks this is a HUGE concern java security..
Use of Java [Interfaces / Abstract classes] http://stackoverflow.com/questions/2869222/use-of-java-interfaces-abstract-classes TeleportingZombie etc. Is this the best thing to do Am i better of with an abstract class Or with a super class I am..
Singletons vs. Application Context in Android? http://stackoverflow.com/questions/3826905/singletons-vs-application-context-in-android web application not a good idea but applied to Android. Am I correct What's different in DalvikVM otherwise EDIT I would..
JFormattedTextField is not properly cleared http://stackoverflow.com/questions/4148336/jformattedtextfield-is-not-properly-cleared and I can not enforce only one integer per text box. Am I missing something really obvious java jtextfield sudoku keyevent..
Java string to date conversion http://stackoverflow.com/questions/4216745/java-string-to-date-conversion in week Text Tuesday Tue u Day number of week Number 1 a Am pm marker Text PM H Hour in day 0 23 Number 0 k Hour in day..
JLabel mouse events for Drag and Drop http://stackoverflow.com/questions/5309150/jlabel-mouse-events-for-drag-and-drop the mouseReleased does not take effect on that JLabel. Am I doing something wrong Thumbnails I_Loop .setText 1 Thumbnails..
How does a HashMap work in Java? http://stackoverflow.com/questions/6493605/how-does-a-hashmap-work-in-java object are not equal then they cannot have same hashcode Am I correct Now if am correct I have following doubt HashMap internally..
What is the difference between Class.getResource() and ClassLoader.getResource()? http://stackoverflow.com/questions/6608795/what-is-the-difference-between-class-getresource-and-classloader-getresource is some kind of caching of the directory listing going on. Am I right and if so where is this documented From the API docs..
http://stackoverflow.com/questions/7520432/java-vs-equals-confusion evaluates to the comparison of values in the objects Am I correct in my understanding java share improve this question..
http://stackoverflow.com/questions/8257148/jtable-not-showing So some sort of event should be fired in setTModel . Am I right If so what event should be thrown and what should be..
Access restriction on class due to restriction on required library rt.jar? http://stackoverflow.com/questions/860187/access-restriction-on-class-due-to-restriction-on-required-library-rt-jar a case where I am trying to refactor a pig from sausage Am I better off recreating the stubs java eclipse wsdl stub wsdl2java..
How to reference components in JSF ajax? Cannot find component with identifier “foo” in view http://stackoverflow.com/questions/8634156/how-to-reference-components-in-jsf-ajax-cannot-find-component-with-identifier I was not able to make the second solution working yet. Am I missing something java ajax jsf jsf 2 primefaces share..
http://stackoverflow.com/questions/9258890/drawing-rectangle-on-a-jpanel on a JPanel I want to draw a recangle on a JPanel. Am able to draw with the following code. public class DrawingColor..
Is it safe to use a static java.sql.Connection instance in a multithreaded system? http://stackoverflow.com/questions/9428573/is-it-safe-to-use-a-static-java-sql-connection-instance-in-a-multithreaded-syste When my app loses connection how should I try to recover Am I Using JDBC Connection Pooling JSP using MVC and JDBC DAO tutorial..
org.apache.xerces.jaxp.SAXParserFactoryImpl not found when importing Gears API in GWT http://stackoverflow.com/questions/1016286/org-apache-xerces-jaxp-saxparserfactoryimpl-not-found-when-importing-gears-api-i following error when I try to compile 19 Jun 2009 3 36 09 AM com.google.apphosting.utils.jetty.JettyLogger warn WARNING failed..
Java is not treating “\n” as new line when retrieved from Database column http://stackoverflow.com/questions/15678768/java-is-not-treating-n-as-new-line-when-retrieved-from-database-column each depiciting ssome informations like below Time 08 AM 11 AM Duration 36 minutes Now in code i will pass Duration to.. depiciting ssome informations like below Time 08 AM 11 AM Duration 36 minutes Now in code i will pass Duration to a method..
How do I get this code to stop input when the sum exceeds 100 and still preform the sum and average? http://stackoverflow.com/questions/18797170/how-do-i-get-this-code-to-stop-input-when-the-sum-exceeds-100-and-still-preform The user gets this message after the 1st input...WHAT AM I DOING WRONG if theSum 100 break JOptionPane.showMessageDialog..
java Calendar, Date, and Time management for a multi-timezone application http://stackoverflow.com/questions/19166995/java-calendar-date-and-time-management-for-a-multi-timezone-application what to do. For example if I schedule an event at 2 00 AM Eastern Time every day then on March 10th 2013 that time does.. that time does not exist. Should the event occur at 3 00 AM Or should it not occur at all Another example if I schedule.. at all Another example if I schedule an event at 1 00 AM Eastern Time every day then on November 3rd 2013 that time occurs..
http://stackoverflow.com/questions/2486985/freetts-problem-in-java calendar.get Calendar.MINUTE calendar.get Calendar.AM_PM 0 AM PM Synthesizer synth Central.createSynthesizer null.. calendar.get Calendar.MINUTE calendar.get Calendar.AM_PM 0 AM PM Synthesizer synth Central.createSynthesizer null synth.allocate..
NoClassDefFoundError while trying to run my jar with java.exe -jar…what's wrong? http://stackoverflow.com/questions/250166/noclassdeffounderror-while-trying-to-run-my-jar-with-java-exe-jar-whats-wron is ECCD A6A7 Directory of C myapp libs 12 11 2007 11 46 AM 52 915 commons logging 1.1.jar 1 File s 52 915 bytes 0 Dir s..
Exception starting Spring application from Java http://stackoverflow.com/questions/3650252/exception-starting-spring-application-from-java path resource applicationContext.xml Sep 6 2010 10 37 21 AM org.springframework.util.xml.SimpleSaxErrorHandler warning WARNING..
Axis2 - always getting 404 errors http://stackoverflow.com/questions/4456342/axis2-always-getting-404-errors I try and make a service call. 16 12 2010 11 14 57 AM org.apache.axis2.deployment.ModuleDeployer deploy INFO Deploying.. axis2 axis2 1.5.3 axis2 1.5.3 jar.jar 16 12 2010 11 14 57 AM org.apache.axis2.transport.http.HTTPSender sendViaPost INFO..
Does it help GC to null local variables in Java http://stackoverflow.com/questions/473685/does-it-help-gc-to-null-local-variables-in-java which we should close myLocalVar null THIS IS THE LINE I AM TALKING ABOUT java variables garbage collection null local..
Configure hibernate to connect to database via JNDI Datasource http://stackoverflow.com/questions/5303671/configure-hibernate-to-connect-to-database-via-jndi-datasource execute the app I get this exception Mar 16 2011 12 29 13 AM com.mchange.v2.resourcepool.BasicResourcePool AcquireTask run.. ThreadPoolAsynchronousRunner.java 547 Mar 16 2011 12 29 13 AM com.mchange.v2.resourcepool.BasicResourcePool AcquireTask run.. ThreadPoolAsynchronousRunner.java 547 Mar 16 2011 12 29 13 AM com.mchange.v2.resourcepool.BasicResourcePool AcquireTask run..
eclipse/tomcat: deploy doesn't work any more (ClassNotFoundException) http://stackoverflow.com/questions/5934922/eclipse-tomcat-deploy-doesnt-work-any-more-classnotfoundexception the problem it worked. Guess I should stop working at 3 AM. java linux eclipse tomcat classnotfoundexception share improve..
java.lang.VerifyError: Expecting a stackmap frame http://stackoverflow.com/questions/8958267/java-lang-verifyerror-expecting-a-stackmap-frame server which im not used to seeing... Jan 22 2012 4 23 44 AM com.google.apphosting.utils.jetty.JettyLogger info INFO Logging.. Jan 22 2012 4 23 44 AM com.google.apphosting.utils.config.AppEngineWebXmlReader readAppEngineWebXml.. gwtone war WEB INF appengine web.xml Jan 22 2012 4 23 44 AM com.google.apphosting.utils.config.AbstractConfigXmlReader readConfigXml..
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