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java Programming Glossary: atHow to upload files to server using JSP/Servlet? http://stackoverflow.com/questions/2422468/how-to-upload-files-to-server-using-jsp-servlet not the file content. When I add enctype multipart form data to the form then request.getParameter returns null . During.. request This line is where it died. Unfortunately the servlet threw an exception without a clear message and.. Servlet execution threw an exception at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter..
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 Are there other hints and best practices on this that may be useful java http httprequest httpurlconnection urlconnection.. and consorts yourself. Preparing We first need to know at least the URL and the charset. The parameters are optional and.. value1 String param2 value2 ... String query String.format param1 s param2 s URLEncoder.encode param1 charset URLEncoder.encode..
How to avoid Java Code in JSP-Files? http://stackoverflow.com/questions/3177733/how-to-avoid-java-code-in-jsp-files Java Code in JSP Files I'm new to Java EE and I know that something like the following three lines x 1 request.getParameter.. code in JSP files. Can someone please tell me the alternative JSP 2 lines and how this technique is called java jsp java.. more time is needed to maintain mingled cluttered duplicated code logic. Sun Oracle itself also recommends in the JSP coding..
http://stackoverflow.com/questions/5621338/how-to-add-jtable-in-jpanel . JPanel contains other components. I have to add JTable at proper position. java swing layout layout manager null layout.. Layout Example The Java Tutorial has comprehensive information on using layout managers. See the Laying Out Components Within.. lesson for further details. One aspect of layouts that is not covered well by the tutorial is that of nested layouts..
The Use of Multiple JFrames, Good/Bad Practice? http://stackoverflow.com/questions/9554636/the-use-of-multiple-jframes-good-bad-practice JFrames Good Bad Practice I'm developing an application which displays images and plays sounds from a database. I'm.. application which displays images and plays sounds from a database. I'm trying to decide whether to use a separate JFrame.. a database. I'm trying to decide whether to use a separate JFrame to add Images to the Database from the GUI. I'm just..
Why 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 backing up and restarting. Consider an if statement At the processor level it is a branch instruction You are a processor..
Waiting for multiple SwingWorkers http://stackoverflow.com/questions/11366330/waiting-for-multiple-swingworkers of the Worker thread using publish process methods . At the end the label is removed from the applet's pane. My question..
JSP tricks to make templating easier? http://stackoverflow.com/questions/1296235/jsp-tricks-to-make-templating-easier tricks to make templating easier At work I've been tasked with turning a bunch of HTML files into.. tag files can be pretty much whatever you want them to be. At the most basic level it's simple cut and paste refactoring... parameterization and replace it with a tag invocation. At a higher level you can do sophisticated things like this table..
Collision detection with complex shapes http://stackoverflow.com/questions/14574045/collision-detection-with-complex-shapes all the red color and set that as the collision bounds At start up use the source seen in the Smoothing a jagged path..
StringBuilder vs String concatenation in toString() in Java http://stackoverflow.com/questions/1532461/stringbuilder-vs-string-concatenation-in-tostring-in-java but at what point do you switch from concat to builder At the point where you're concatenating in a loop that's usually..
How to get the insert ID in JDBC? http://stackoverflow.com/questions/1915166/how-to-get-the-insert-id-in-jdbc is Microsoft SQL Server in my case using JDBC in Java. At the same time I want to obtain the insert ID. How can I achieve..
non-static variable cannot be referenced from a static context http://stackoverflow.com/questions/2559527/non-static-variable-cannot-be-referenced-from-a-static-context similar to all cars. Think of it as a template or an idea. At the same time the car you see is an instance of the class car..
http://stackoverflow.com/questions/2707322/what-is-null-in-java RelationalExpression instanceof ReferenceType At run time the result of the instanceof operator is true if the.. It was the invention of the null reference in 1965. At that time I was designing the first comprehensive type system..
Fastest way to determine if an integer's square root is an integer http://stackoverflow.com/questions/295579/fastest-way-to-determine-if-an-integers-square-root-is-an-integer y 32 y y & 65535 y 16 y y & 255 y 8 & 255 y 16 At this point y is between 0 and 511. More code can reduce it farther... 0 x 16 if x & 255 0 x 8 if x & 15 0 x 4 if x & 3 0 x 2 At this point for our number to be a square it must be 1 mod 8... accurate modulo a larger and larger power of 2 namely t 2. At the end r and t 2 r will be square roots of x modulo t 2. Note..
http://stackoverflow.com/questions/299068/how-slow-are-java-exceptions tried running a method in a loop that executes some code. At the end of the method I use a boolean to indicate whether to..
Switch Statement with Strings in Java http://stackoverflow.com/questions/338206/switch-statement-with-strings-in-java assigned to each case to be sorted at compile time. At runtime while the O 1 performance of tableswitch generally appears..
Java generics - type erasure - when and what happens http://stackoverflow.com/questions/339699/java-generics-type-erasure-when-and-what-happens erasure on Sun's website . When does type erasure occur At compile time runtime when the class is loaded runtime when the.. list new ArrayList list.add Hi String x String list.get 0 At execution time there's no way of finding out that T String for..
http://stackoverflow.com/questions/3655316/browser-cant-access-find-relative-resources-like-css-images-and-links-when-cal has its own pros and cons. It's up to you which to choose. At least you should now understand how this problem is caused and..
How to deal with “java.lang.OutOfMemoryError: Java heap space” error (64MB heap size) http://stackoverflow.com/questions/37335/how-to-deal-with-java-lang-outofmemoryerror-java-heap-space-error-64mb-heap you need to look into caching objects out to disk etc. At this point you should have a very good reason to say I need..
What is the most appropriate way to store user settings in Android application http://stackoverflow.com/questions/785973/what-is-the-most-appropriate-way-to-store-user-settings-in-android-application sort of cryptographic store though that's non trivial. At the very least make sure you're encrypting the password before..
Update JLabel every X seconds from ArrayList<List> - Java http://stackoverflow.com/questions/7943584/update-jlabel-every-x-seconds-from-arraylistlist-java
How to read well formed XML in Java, but skip the schema? http://stackoverflow.com/questions/1185519/how-to-read-well-formed-xml-in-java-but-skip-the-schema the issue not the root of it. I don't want to ask for it AT ALL. java xml share improve this question The reference..
Crowdsourcing a Complete list of Common Java System Properties and Known Values http://stackoverflow.com/questions/1803075/crowdsourcing-a-complete-list-of-common-java-system-properties-and-known-values the central repository as soon as I have enough input. UPDATE Public Repository finally SystemProperty.java is now available.. file.encoding.pkg null read only FILE_SEPARATOR file.separator read only JAVA_AWT_GRAPHICSENV java.awt.graphicsenv.. sun.print.PSPrinterJob read only JAVA_CLASS_PATH java.class.path . read only JAVA_CLASS_VERSION java.class.version..
Inner class in interface vs in class http://stackoverflow.com/questions/1845731/inner-class-in-interface-vs-in-class A and B in another class that does not implement interface AT ALL. public class Z NOTE NO INTERFACE IMPLEMENTED here Levels.Items..
Modelling a Finite Deterministic Automaton via this data http://stackoverflow.com/questions/1870519/modelling-a-finite-deterministic-automaton-via-this-data WORK BUT I DON'T KNOW WHY THE STRING GETS STUCK ON STATE 0 WHEN BEING PROCESSED. To change this template choose Tools.. if aFinalState.isFinal true System.out.println THE STATE aFinalStateId IS MARKED AS FINAL public void markInitialState.. initialStateId DEBUG System.out.println THE INITIAL STATE ID IS initialStateId theInitialState allStates.get initialStateId..
What happened to JAXB's NamespacePrefixMapper in JDK6u18 http://stackoverflow.com/questions/2326107/what-happened-to-jaxbs-namespaceprefixmapper-in-jdk6u18 there for a long time and it NOT MEANT TO BE USED BY YOU AT ALL hence the internal packaging . The problem here is that..
Netbeans GUI editor generating its own incomprehensible code http://stackoverflow.com/questions/2561480/netbeans-gui-editor-generating-its-own-incomprehensible-code application it creates some code which I DO NOT RECOGNISE AT ALL as what i had learnt in swing. It imports packages such..
Regular expression to parse a log file and find stacktraces http://stackoverflow.com/questions/3814327/regular-expression-to-parse-a-log-file-and-find-stacktraces and after stack traces are completely random Modem ERROR AT Owner CoreTalk TIMEOUT IN Try Open COM3 javax.comm.PortInUseException..
Transaction rollback and web services http://stackoverflow.com/questions/434950/transaction-rollback-and-web-services services is also an option in some cases. The WS AT and WS BA protocols are the leading standards for transactional.. transaction to the WS one. Since the models used by the WS AT and XA protocols are closely related this can be achieved by..
Removing strings from another string in java http://stackoverflow.com/questions/4769282/removing-strings-from-another-string-in-java when where who will with the www I A AND ABOUT AN ARE AS AT BE BY COM FOR FROM HOW IN IS IT NOT OF ON OR THAT THE THIS TO.. ARE AS AT BE BY COM FOR FROM HOW IN IS IT NOT OF ON OR THAT THE THIS TO WAS WHAT WHEN WHERE WHO WILL WITH THE WWW private.. FOR FROM HOW IN IS IT NOT OF ON OR THAT THE THIS TO WAS WHAT WHEN WHERE WHO WILL WITH THE WWW private static final String..
The Webserver I talk to updated its SSL cert and now my app can't talk to it http://stackoverflow.com/questions/5758812/the-webserver-i-talk-to-updated-its-ssl-cert-and-now-my-app-cant-talk-to-it Certificate chain 0 s C US ST Georgia L Alpharetta O ATT Services Inc. OU ATTIT CN eservices3.bus.att.com i C US O VeriSign.. 0 s C US ST Georgia L Alpharetta O ATT Services Inc. OU ATTIT CN eservices3.bus.att.com i C US O VeriSign Inc. OU VeriSign.. CA G3 is an intermediate certificate not a root. The AT T server is misconfigured and should be sending both its own..
Why java people frequently consume exception silently? http://stackoverflow.com/questions/921471/why-java-people-frequently-consume-exception-silently on my background I'd prefer to remove printStackTrace AT ALL. I would simply rethrow as an unhandled aka RuntimeException...
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