java Programming Glossary: orHow to upload files to server using JSP/Servlet? http://stackoverflow.com/questions/2422468/how-to-upload-files-to-server-using-jsp-servlet I upload files to server using JSP Servlet I tried this form action upload method post input type text name description.. description input type file name file input type submit form However I only get the file name not the file content. When.. name not the file content. When I add enctype multipart form data to the form then request.getParameter returns null . During..
Overriding equals and hashCode in Java http://stackoverflow.com/questions/27581/overriding-equals-and-hashcode-in-java equals hashcode share improve this question The theory for the language lawyers and the mathematically inclined equals.. equals hashcode share improve this question The theory for the language lawyers and the mathematically inclined equals.. then it must keep returning the same value . Furthermore o.equals null must always return false. hashCode javadoc must..
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 URLConnection is pretty often asked here and the Oracle tutorial is too concise about it. So how do I use it to fire and handle.. share improve this question First a disclaimer beforehand the posted code snippets are all basic examples. You'll.. ArrayIndexOutOfBoundsException and consorts yourself. Preparing We first need to know at least the URL..
How do servlets work? Instantiation, session variables and multithreading http://stackoverflow.com/questions/3106452/how-do-servlets-work-instantiation-session-variables-and-multithreading do servlets work Instantiation session variables and multithreading Suppose.. Suppose I have a webserver which holds numerous servlets. For information passing among those servlets I am getting the servlet.. I have a webserver which holds numerous servlets. For information passing among those servlets I am getting the servlet..
How to avoid Java Code in JSP-Files? http://stackoverflow.com/questions/3177733/how-to-avoid-java-code-in-jsp-files Expression Language those things over a decade ago. The major disadvantages of scriptlets are Reusability you can't reuse.. are not unit testable. Maintainability per saldo more time is needed to maintain mingled cluttered duplicated code.. be used in your web application to help reduce the need for JSP scriptlets in your pages. Pages that use JSTL are in general..
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 methods in Java Swing Several times I've been criticized for having suggested the use of the following methods setPreferredSize.. see any alternative to their use when I want to define proportions between displayed components. I have been told this With.. the use of those methods The methods have been defined for a reason. So when should I use them In which context For what..
The Use of Multiple JFrames, Good/Bad Practice? http://stackoverflow.com/questions/9554636/the-use-of-multiple-jframes-good-bad-practice to code and maintain A modal dialog offers the easy opportunity to focus attention on the content of that dialog choose.. cancel this then proceed. Multiple frames do not. A dialog or floating tool bar with a parent will come to front when the.. to implement that in frames if that was the desired behavior. There are any number of ways of displaying many elements in..
Android update 17 seems incompatible with external Jars http://stackoverflow.com/questions/10046298/android-update-17-seems-incompatible-with-external-jars more recent versions of the jars that have those classes Or do I need to revert back to my previous version of java Or is.. Or do I need to revert back to my previous version of java Or is this some totally unrelated problem that I'm just assuming..
How to send HTTP request in java? http://stackoverflow.com/questions/1359689/how-to-send-http-request-in-java this question You can use java.net.HttpUrlConnection . Or maybe this link is easier to read http www.xyzws.com Javafaq..
Why JSF calls getters multiple times http://stackoverflow.com/questions/2090033/why-jsf-calls-getters-multiple-times public void preRender ComponentSystemEvent event Or in some SystemEvent method e.g. f event type preRenderView ... public void change ValueChangeEvent event Or in some FacesEvent method e.g. h inputXxx valueChangeListener.. public void ajaxListener AjaxBehaviorEvent event Or in some BehaviorEvent method e.g. f ajax listener . someProperty..
How to call SOAP web service in Android http://stackoverflow.com/questions/297586/how-to-call-soap-web-service-in-android services and using JSON as a data encapsulation format. Or using XMPP for messaging. But that is just conjecture. XML based..
How to avoid Java Code in JSP-Files? http://stackoverflow.com/questions/3177733/how-to-avoid-java-code-in-jsp-files to maintain mingled cluttered duplicated code logic. Sun Oracle itself also recommends in the JSP coding conventions to.. e throw new ServletException Executing action failed. e Or just adopt a MVC framework like JSF Spring MVC Wicket etc so..
Design Patterns web based applications http://stackoverflow.com/questions/3541077/design-patterns-web-based-applications all it's options and forward request to service layer.Or should we have one servlet for the whole page which will process.. LoginAction actions.put GET logout new LogoutAction ... Or configurable based on a properties XML configuration file in.. entry.getKey Class.forName entry.getValue .newInstance Or dynamically based on a scan in the classpath for classes implementing..
http://stackoverflow.com/questions/3655316/browser-cant-access-find-relative-resources-like-css-images-and-links-when-cal pageContext.request.contextPath and used as root elsewhere Or if you don't fear unreadable XML and broken XML syntax highlighting..
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 in the production environment for example Apache Tomcat Oracle Glassfish JBoss AS etc. A servletcontainer is a concrete.. of the Servlet API. Note that the Java EE SDK download at Oracle.com basically contains Glassfish. So if you happen to already.. This way you'll be able to import and use the Servlet API. Or if it's an existing project you can set change the server by..
http://stackoverflow.com/questions/4112686/how-to-use-servlets-and-ajax name url pattern someservlet url pattern servlet mapping Or when you're already on a Servlet 3.0 compatible container Tomcat..
Prevent user from going back to the previous secured page after logout http://stackoverflow.com/questions/4194207/prevent-user-from-going-back-to-the-previous-secured-page-after-logout filter name url pattern .jsp url pattern filter mapping Or if you want to put this restriction on secured pages only then..
Can you find all classes in a package using reflection? http://stackoverflow.com/questions/520328/can-you-find-all-classes-in-a-package-using-reflection to in a file or reference them in a different class. Or just use convention when it comes to naming. Addendum The Reflections..
Java: checked vs unchecked exception explanation http://stackoverflow.com/questions/6115896/java-checked-vs-unchecked-exception-explanation new FileNotFoundException File not found Should I log Or should I System.exit 0 4. Now couldnt the above code also be..
When to use <ui:include>, tag files, composite components and/or custom components? http://stackoverflow.com/questions/6822000/when-to-use-uiinclude-tag-files-composite-components-and-or-custom-componen this blog Uploading files with JSF 2.0 and Servlet 3.0 . Or when you want to control the building of the JSF component tree..
Something seems wrong with the layout, JButton showing unexpected behaviour at resize of the window http://stackoverflow.com/questions/9849950/something-seems-wrong-with-the-layout-jbutton-showing-unexpected-behaviour-at-r the scenario am I doing something wrong in the program. Or is this exactly the situation where I should be using the SwingWorker.. the situation where I should be using the SwingWorker Or Is this an issue with the Layout or something hidden related..
Why are Exceptions not Checked in .NET? http://stackoverflow.com/questions/124143/why-are-exceptions-not-checked-in-net code catch Exception e either log.error Error fooing bar e OR throw new RuntimeException e If you actually know that there..
Use of '? extends ' and '? super ' in Collection generics [duplicate] http://stackoverflow.com/questions/12604477/use-of-extends-and-super-in-collection-generics numbers for Number number numbers Do something with number OR Number number numbers.get 0 OR Number number numbers.remove.. Do something with number OR Number number numbers.get 0 OR Number number numbers.remove 0 Calls to methods like get will.. requires knowing its concrete type for Object obj integers OR Object obj integers.get 0 OR Object obj integers.remove 0 What's..
Java: What is the best way to SFTP a file from a server http://stackoverflow.com/questions/14617/java-what-is-the-best-way-to-sftp-a-file-from-a-server dist UserInfo ui new MyUserInfo session.setUserInfo ui OR non interactive version. Relies in host key being in known hosts.. ChannelSftp channel sftpChannel.get remote file local file OR InputStream in sftpChannel.get remote file process inputstream..
ejb lookup failing with NamingException http://stackoverflow.com/questions/1473939/ejb-lookup-failing-with-namingexception A session bean 䏭 remote home interface MUST DEFINE ONE OR MORE create METHOD methods. A stateless session bean MUST DEFINE.. A session bean 䏭 remote home interface MUST DEFINE ONE OR MORE create METHOD methods. A stateless session bean MUST DEFINE.. p new Properties p.put Context.INITIAL_CONTEXT_FACTORY org.jnp.interfaces.NamingContextFactory p.put Context.URL_PKG_PREFIXES..
&& (AND) and || (OR) in IF statements http://stackoverflow.com/questions/1795808/and-and-or-in-if-statements AND and OR in IF statements My question might be very basic but still..
How to turn off the Eclipse code formatter for certain sections of Java code? http://stackoverflow.com/questions/1820908/how-to-turn-off-the-eclipse-code-formatter-for-certain-sections-of-java-code code with SQL statements written as Java strings please no OR M flamewars the embedded SQL is what it is not my decision ... could be programmed to respect it as well STOP ECLIPSE FORMATTING String query SELECT FOO BAR BAZ FROM ABC WHERE BAR 4.. SELECT FOO BAR BAZ FROM ABC WHERE BAR 4 START ECLIPSE FORMATTING Obviously one solution is to have our team members standardize..
Producer/Consumer threads using a Queue http://stackoverflow.com/questions/2332537/producer-consumer-threads-using-a-queue static Object dequeue do some stuff return readQ.get OR Main class public class SomeApp Queue Object readQ private Consumer..
How to create dynamic JSF 1.2 form fields http://stackoverflow.com/questions/3510614/how-to-create-dynamic-jsf-1-2-form-fields the appropriate JSF form components ie label inputText etc OR Another approach would be to just display the kf ourCustomComponent..
Differences in boolean operators: & vs && and | vs || http://stackoverflow.com/questions/4014535/differences-in-boolean-operators-vs-and-vs this question Those are the bitwise AND and bitwise OR operators. int a 6 110 int b 4 100 Bitwise AND int c a b 110.. 110 int b 4 100 Bitwise AND int c a b 110 100 100 Bitwise OR int d a b 110 100 110 System.out.println c 4 System.out.println..
Intersection and union of ArrayLists in Java http://stackoverflow.com/questions/5283047/intersection-and-union-of-arraylists-in-java so I can filter files. Some are AND filters and some are OR filters like in set theory so I need to filter according to..
http://stackoverflow.com/questions/6093537/for-loop-optimization looks like this... for int i 0 i flowers.size i ... OR should I change this to look like the code given below int size..
Pass String as params from one Java App to another http://stackoverflow.com/questions/6121990/pass-string-as-params-from-one-java-app-to-another ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED frm.setDefaultCloseOperation JFrame.EXIT_ON_CLOSE.. it. exec cmd c start java jar C Dialog.jar Passed info OR exec new String cmd c start java jar C Dialog.jar Passed info.. like JMS Active MQ etc. You could use RMI. You could use CORBA. I'm sure there are other approaches as well. I have no idea..
How to implement dynamic GUI in swing http://stackoverflow.com/questions/6355544/how-to-implement-dynamic-gui-in-swing indicating whether these should be combined with AND or OR. The GUI would allow the user to add change or remove criteria.. JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED JScrollPane.HORIZONTAL_SCROLLBAR_NEVER JPanel bottomPanel CreateBottomPanel..
Why do we usually use `||` not `|`, what is the difference? http://stackoverflow.com/questions/7101992/why-do-we-usually-use-not-what-is-the-difference difference I'm just wondering why we usually use logical OR between two booleans not bitwise OR though they are both working.. we usually use logical OR between two booleans not bitwise OR though they are both working well. I mean look at the following..
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