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java Programming Glossary: seeWhy is processing a sorted array faster than an unsorted array? http://stackoverflow.com/questions/11227809/why-is-processing-a-sorted-array-faster-than-an-unsorted-array than an unsorted array Here is a piece of C code that seems very peculiar. For some strange reason sorting the data miraculously.. it is a branch instruction You are a processor and you see a branch. You have no idea which way it will go. What do you..
How to round a number to n decimal places in Java http://stackoverflow.com/questions/153724/how-to-round-a-number-to-n-decimal-places-in-java df.format 0.912385 returns 0.91238 However as you can see this uses half even rounding. That is it will round down if.. digits share improve this question Use setRoundingMode see linked Javadoc set the RoundingMode explicitly to handle your..
Why JSF calls getters multiple times http://stackoverflow.com/questions/2090033/why-jsf-calls-getters-multiple-times a known issue. One workaround was to include a check and see if it had already been calculated private String someProperty..
How to discover memory usage of my application in Android http://stackoverflow.com/questions/2298208/how-to-discover-memory-usage-of-my-application-in-android you can in theory add up the pss across all processes to see the total RAM they are using and compare pss between processes.. can also tack on the name or pid of a single process to see for example adb shell dumpsys meminfo system give me the system.. you get an ridiculously large number . Pss is as we've seen before and Uss is Priv Dirty. Interesting thing to note here..
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 may want to read the HttpURLConnection#getErrorStream to see if the server has sent any useful error information. InputStream.. FileUpload to parse a multipart form data request. Also see this answer for examples of both the FileUpload and the Servelt..
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 and delegate the hard work to the system. First let's see a utility method @param context used to check the device version..
GUI not working after rewriting to MVC http://stackoverflow.com/questions/3066590/gui-not-working-after-rewriting-to-mvc and repainted with new color noting happens. Can anybody see any problems here I've tried placing repaint in different places.. import javax.swing.JLabel import javax.swing.JPanel @see http stackoverflow.com q 3066590 230513 15 Mar 2011 r8 http..
JSTL in JSF2 Facelets… makes sense? http://stackoverflow.com/questions/3342984/jstl-in-jsf2-facelets-makes-sense code conditionally. For that purpose the JSTL tags seem to work fine c if test lpc.verbose ... c if However I'm not.. in JSF 2.0 @ViewScoped fails in tag handlers To see some real world examples where JSTL tags are helpful i.e. when.. i.e. when really properly used during building the view see the following questions answers create table columns dynamically..
http://stackoverflow.com/questions/4112686/how-to-use-servlets-and-ajax or newer then use the @WebServlet annotation on the class see also our Servlets wiki page @WebServlet someservlet public class.. Open the JSP in the browser and press the button. You'll see that the content of the div get updated with the servlet response... objects and JSON strings. There are plenty of them as well see the bottom of this page for an overview . My personal favourite..
How to choose the right bean scope? http://stackoverflow.com/questions/7031885/how-to-choose-the-right-bean-scope make it to be shared among all users so anyone else can see each other's data which is just plain wrong. Abusing a session.. single ajax postback causing possibly non working forms see also points 4 and 5 here . Abusing a view scoped bean for request..
Scanner issue when using nextLine after nextXXX http://stackoverflow.com/questions/7056749/scanner-issue-when-using-nextline-after-nextxxx Output Insert a number 55 Text1 Text2 Hi there As you can see the program skipped String text1 input.nextLine . What is the..
What is an efficient way to implement a singleton pattern in Java? http://stackoverflow.com/questions/70689/what-is-an-efficient-way-to-implement-a-singleton-pattern-in-java Java Reloaded talk at Google I O 2008 link to video . Also see slides 30 32 of his presentation effective_java_reloaded.pdf..
Should I avoid the use of set(Preferred|Maximum|Minimum)Size methods in Java Swing? http://stackoverflow.com/questions/7229226/should-i-avoid-the-use-of-setpreferredmaximumminimumsize-methods-in-java-swi setMinimumSize setMaximumSize on Swing components. I don't see any alternative to their use when I want to define proportions..
The Use of Multiple JFrames, Good/Bad Practice? http://stackoverflow.com/questions/9554636/the-use-of-multiple-jframes-good-bad-practice JFrames Bad bad bad practice. User unfriendly The user sees multiple icons in their task bar when expecting to see only.. sees multiple icons in their task bar when expecting to see only one. Plus the side effects of the coding problems.. A nightmare.. image the user is interested in at that moment. As seen in ImageViewer . A single row JList . As seen in this answer..
How can I convert my Java program to an .exe file? [closed] http://stackoverflow.com/questions/147181/how-can-i-convert-my-java-program-to-an-exe-file improve this question Some options Executable Jar File See also Distributing your Application as an executable JAR file.. or type a single command UNIX to start a Java application. See also for reference Convert Java to EXE Why When When Not and..
Java web development, what skills do I need? [closed] http://stackoverflow.com/questions/1958808/java-web-development-what-skills-do-i-need or so. For example Beginning Java EE 6 with GlassFish 3 . See also What is the difference between JSF Servlet and JSP Stackoverflow..
Why JSF calls getters multiple times http://stackoverflow.com/questions/2090033/why-jsf-calls-getters-multiple-times unnecessarily be executed on every single getter call. See also Why is the getter called so many times by the rendered..
How to upload files to server using JSP/Servlet? http://stackoverflow.com/questions/2422468/how-to-upload-files-to-server-using-jsp-servlet sources have failed hard in this such as roseindia.net. See also uploading of pdf file . You should rather use a real library..
What is a raw type and why shouldn't we use it? http://stackoverflow.com/questions/2770321/what-is-a-raw-type-and-why-shouldnt-we-use-it it as List Object names and the above code would compile. See also Java Tutorials Generics How's a raw type different from.. therefore lose the type safety that you get from generics. See also What is the difference between E extends Number and Number.. operand e.g. o instanceof Set not o instanceof Set String See also Why is Collection String .class Illegal share improve..
How do servlets work? Instantiation, session variables and multithreading http://stackoverflow.com/questions/3106452/how-do-servlets-work-instantiation-session-variables-and-multithreading request.getParameter foo OK this is thread safe. See also Servlets and Multithreading Difference between JSP and..
How to avoid Java Code in JSP-Files? http://stackoverflow.com/questions/3177733/how-to-avoid-java-code-in-jsp-files so you don't need to worry about XSS holes in Facelets. See also Hidden features of JSP Servlet What's the difference between..
JSTL in JSF2 Facelets… makes sense? http://stackoverflow.com/questions/3342984/jstl-in-jsf2-facelets-makes-sense fixed otherwise you must turn off partial state saving. See also Communication in JSF 2.0 @ViewScoped fails in tag handlers.. h someComponent rendered # lpc.verbose ... h someComponent See also Conditionally displaying JSF components share improve..
How do I import the javax.servlet API in my Eclipse project? http://stackoverflow.com/questions/4076601/how-do-i-import-the-javax-servlet-api-in-my-eclipse-project Incompatible argument to function jar not loaded. See Servlet Spec 2.3 section 9.7.2. Offending class javax servlet..
http://stackoverflow.com/questions/4112686/how-to-use-servlets-and-ajax of currently iterated product and append it to the tr . See also Handling Servlet output in Ajax Calling Servlet from Javascript..
Using JFreeChart to display recent changes in a time series http://stackoverflow.com/questions/5048852/using-jfreechart-to-display-recent-changes-in-a-time-series that incorporates the accepted answer is shown here . See also this variation having two series. java dynamic jfreechart..
How to: generic array creation http://stackoverflow.com/questions/529085/how-to-generic-array-creation when they are passed arguments that are not of type E . See Collections.checkedCollection . in that case you should write..
http://stackoverflow.com/questions/5621338/how-to-add-jtable-in-jpanel has comprehensive information on using layout managers. See the Laying Out Components Within a Container lesson for further..
How can I create an executable jar with dependencies using Maven? http://stackoverflow.com/questions/574594/how-can-i-create-an-executable-jar-with-dependencies-using-maven or otherwise the code on your own project is not included. See more details in comments. Commonly this goal is tied to a build..
http://stackoverflow.com/questions/5853879/swing-obtain-image-of-jframe true SwingUtilities.invokeLater r Screen shot See also The code shown above presumes the component has been realized..
How to choose the right bean scope? http://stackoverflow.com/questions/7031885/how-to-choose-the-right-bean-scope with request parameters to maintain the client's state. See also Under the covers basic Servlet working of request response..
paintComponent does not work if its called by the recursive function? http://stackoverflow.com/questions/10338163/paintcomponent-does-not-work-if-its-called-by-the-recursive-function question SIMPLE EXPLANATION AS TO WHY YOU COULD ONLY SEE THE LAST UPDATE A quote taken from Filthy Rich Clients by Chet..
calling java method in javascript http://stackoverflow.com/questions/11536455/calling-java-method-in-javascript endpoint and perform an AJAX call in the Javascript code. SEE http docs.jquery.com Tutorials ajax tutorial There are a few.. possible but unsure why you would want to do it that way SEE http www.andonyar.com rec 2008 12 gemse demo doc dev java.xhtml.. www.andonyar.com rec 2008 12 gemse demo doc dev java.xhtml SEE http www.rgagnon.com javadetails java 0170.html Google's web..
How can I use “.” as the delimiter with String.split() in java http://stackoverflow.com/questions/2755945/how-can-i-use-as-the-delimiter-with-string-split-in-java AND IT WILL WORK System.out.println words 0 TESTING TO SEE IF IT WORKED listIndex public static void readFile String..
Understanding EJB3/JPA container-level transactions and isolation level http://stackoverflow.com/questions/4136852/understanding-ejb3-jpa-container-level-transactions-and-isolation-level SOMETHING TO THE DATABASE thirdEjb.doSomething CAN'T SEE THAT SOMETHING IN THE DATABASE I've set the TransactionAttribute..
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