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java Programming Glossary: belowStringBuilder vs String concatenation in toString() in Java http://stackoverflow.com/questions/1532461/stringbuilder-vs-string-concatenation-in-tostring-in-java in toString in Java Given the 2 toString implementations below which is prefered public String toString return a a b b c c..
Floating point arithmetic not producing exact results in Java http://stackoverflow.com/questions/1661273/floating-point-arithmetic-not-producing-exact-results-in-java floating point arithmetic in Java as shown in the code below public class TestMain private static Map Integer Double ccc..
Trusting all certificates using HttpClient over HTTPS http://stackoverflow.com/questions/2642777/trusting-all-certificates-using-httpclient-over-https Exception e return new DefaultHttpClient BTW the link below is for someone who is looking for HttpURLConnection solution...
How to use java.net.URLConnection to fire and handle HTTP requests? http://stackoverflow.com/questions/2793150/how-to-use-java-net-urlconnection-to-fire-and-handle-http-requests will force the request body being sent in chunks. The below example will send the body in chunks of 1KB. httpConnection.setChunkedStreamingMode..
GUI not working after rewriting to MVC http://stackoverflow.com/questions/3066590/gui-not-working-after-rewriting-to-mvc changes. Several approaches are widely used In the example below Model extends Observable for simplicity. A more common approach..
How do servlets work? Instantiation, session variables and multithreading http://stackoverflow.com/questions/3106452/how-do-servlets-work-instantiation-session-variables-and-multithreading other requests in other sessions. That's threadunsafe The below example illustrates that public class MyServlet extends HttpServlet..
JSTL in JSF2 Facelets… makes sense? http://stackoverflow.com/questions/3342984/jstl-in-jsf2-facelets-makes-sense components are evaluated during view build time. Thus the below answer applies to them as well. The view build time is that..
Design Patterns web based applications http://stackoverflow.com/questions/3541077/design-patterns-web-based-applications the mentioned ones I personally recommend JSF 2.0 . In the below detailed explanation I'll restrict myself to request based MVC.. parameters. The Business Model is called Action in the below HttpServlet example. protected void service HttpServletRequest..
Setting the default Java character encoding? http://stackoverflow.com/questions/361975/setting-the-default-java-character-encoding set but it doesn't seem to cause the final getBytes call below to use UTF8 System.setProperty file.encoding UTF 8 byte inbytes..
Can a progress bar be used in a class outside main? http://stackoverflow.com/questions/4637215/can-a-progress-bar-be-used-in-a-class-outside-main this question SwingWorker is ideal for this. The example below performs a simple iteration in the background while reporting..
http://stackoverflow.com/questions/469695/decode-base64-data-in-java the best way to go in general. EDIT 2 As amir75 points out below Java 6 ships with JAXB which contains supported code to encode..
Draw a line in a JPanel with button click in Java http://stackoverflow.com/questions/5797862/draw-a-line-in-a-jpanel-with-button-click-in-java may offer some additional guidance. Addendum The example below implements the outline above. I've update the example to show..
Remove Top-Level Container on Runtime http://stackoverflow.com/questions/6309407/remove-top-level-container-on-runtime see the nightmare is via a profiler. Running the example below with jvisualvm one can see that periodic collection never quite..
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 be treated as a relative search expression as described below. Otherwise if this UIComponent is a NamingContainer it will..
How to use an existing database with an Android application [duplicate] http://stackoverflow.com/questions/9109438/how-to-use-an-existing-database-with-an-android-application . NOTE Before trying this code please find this line in below code private static String DB_NAME YourDbName Database name.. ordersDB Keep the Database in assets folder then follow below DataHelper class import java.io.File import java.io.FileOutputStream..
JTable duplicate values in row http://stackoverflow.com/questions/9132987/jtable-duplicate-values-in-row I have a JTable populated with a custom DataModel pasted below and when I call the populate method it appears to populate the..
The Use of Multiple JFrames, Good/Bad Practice? http://stackoverflow.com/questions/9554636/the-use-of-multiple-jframes-good-bad-practice to the parent doing so. As items in a JList simple example below . As nodes in a JTree . Nested layouts . But if those strategies..
Program to create a PNG waveform for an audio file http://stackoverflow.com/questions/11017283/program-to-create-a-png-waveform-for-an-audio-file image png wav javasound share improve this question Below is a java class that will do this very thing. There are certain..
Drawing a Component to BufferedImage causes display corruption http://stackoverflow.com/questions/11739989/drawing-a-component-to-bufferedimage-causes-display-corruption if I comment this line out everything works fine. Below is the JScrollNavigator 's overridden paintComponent method..
how binding attribute in JSF works http://stackoverflow.com/questions/14911158/how-binding-attribute-in-jsf-works with the UICommand attribute of User object Thanks. EDIT Below is the generated output. I'm using sun implementation 1.2. form..
http://stackoverflow.com/questions/155243/why-is-it-impossible-without-attempting-i-o-to-detect-that-tcp-socket-was-grac returns false but why isn't there something like isClosing Below are the test classes that use pre NIO sockets. But identical..
http://stackoverflow.com/questions/1688099/converting-json-to-java available by simply saying myJsonString object.getJson . Below is an example of what the string can look like 'title' 'ComputingandInformationsystems'..
Producer/Consumer threads using a Queue http://stackoverflow.com/questions/2332537/producer-consumer-threads-using-a-queue Queue class that is an in house class and is thread safe. Below are two examples with 4 classes each. Main class public class..
What would be the fastest method to test for primality in Java? http://stackoverflow.com/questions/2385909/what-would-be-the-fastest-method-to-test-for-primality-in-java to check whether a given number is prime or not in Java . Below are several primality testing methods I came up with. Is there..
Java - How to find the redirected url of a url? http://stackoverflow.com/questions/2659000/java-how-to-find-the-redirected-url-of-a-url want to know the url to which the previous url redirected. Below are the header fields that I got as a response null HTTP 1.1..
Java/JAXB: Unmarshall Xml to specific subclass based on an attribute http://stackoverflow.com/questions/2992234/java-jaxb-unmarshall-xml-to-specific-subclass-based-on-an-attribute org.eclipse.persistence.jaxb.JAXBContextFactory Below is the rest of the model classes Shapes import java.util.ArrayList.. String t this.triangleSpecificAttribute t Below is a demo program to check that everything works import java.io.StringReader..
Why does this go into an infinite loop? http://stackoverflow.com/questions/3831341/why-does-this-go-into-an-infinite-loop @Override void run while true System.out.println Main.x Below is an excerpt of the above program's output. Notice the irregular..
Using client/server certificates for two way authentication SSL socket on Android http://stackoverflow.com/questions/4064810/using-client-server-certificates-for-two-way-authentication-ssl-socket-on-androi raw SSL sockets. I need SSL sockets for this application. Below is the code in my SSLClient.java file. It reads the keystore..
Generate/get xpath from XML node java http://stackoverflow.com/questions/4746299/generate-get-xpath-from-xml-node-java form. To aid readability an index of 1 is never displayed. Below is my initial answer may be ignored Here is a pure XSLT 1.0.. answer may be ignored Here is a pure XSLT 1.0 solution Below is a sample xml document and a stylesheet that takes a node..
Sessions in struts2 application http://stackoverflow.com/questions/5509606/sessions-in-struts2-application out on the benefits of using the framework. Login Example Below is some example code for creating a basic login system using..
Java: checked vs unchecked exception explanation http://stackoverflow.com/questions/6115896/java-checked-vs-unchecked-exception-explanation I bubble up the exact exception or mask it using Exception Below are my readings In Java when should I create a checked exception..
java.rmi.NoSuchObjectException: no such object in table http://stackoverflow.com/questions/645208/java-rmi-nosuchobjectexception-no-such-object-in-table remains reachable i.e. ineligible for garbage collection. Below is a script that demonstrates a java.rmi.NoSuchObjectException..
http://stackoverflow.com/questions/648471/merge-two-xml-files-in-java suggestion but still having issues with XML merge. Below is a sample of the type of structure of XML files that I am..
http://stackoverflow.com/questions/7146207/what-is-the-best-macro-benchmarking-tool-framework-to-measure-a-single-threade performance measurement share improve this question Below is an alphabetical list of all the tools I found. The aspects..
Is it possible to read from a InputStream with a timeout? http://stackoverflow.com/questions/804951/is-it-possible-to-read-from-a-inputstream-with-a-timeout version . Please note this is not as simple as it looks. Below are some facts which are supported directly by Sun's documentation...
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