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java Programming Glossary: alsoHow to upload files to server using JSP/Servlet? http://stackoverflow.com/questions/2422468/how-to-upload-files-to-server-using-jsp-servlet have failed hard in this such as roseindia.net. See also uploading of pdf file . You should rather use a real library.. User Guide and FAQ carefully go through both . There's also the O'Reilly cos MultipartRequest but it has some minor bugs.. parse multipart request. e ... Alternatively you can also wrap this all in a Filter which parses it all automagically..
Overriding equals and hashCode in Java http://stackoverflow.com/questions/27581/overriding-equals-and-hashcode-in-java null must always return false. hashCode javadoc must also be consistent if the object is not modified in terms of equals..
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 value format and be concatenated by . You would normally also URL encode the query parameters with the specified charset using.. type hidden elements into the query string and of course also the name value pair of the input type submit element which you'd.. if a button was pressed and if so which one . You can also cast the obtained URLConnection to HttpURLConnection and use..
How do servlets work? Instantiation, session variables and multithreading http://stackoverflow.com/questions/3106452/how-do-servlets-work-instantiation-session-variables-and-multithreading and store it in server's memory. The servletcontainer will also set a Cookie in the HTTP response with JSESSIONID as cookie.. expensive to recreate it on every request. But you should also realize that you should never assign any request or session.. request.getParameter foo OK this is thread safe. See also Servlets and Multithreading Difference between JSP and Servlet..
How to avoid Java Code in JSP-Files? http://stackoverflow.com/questions/3177733/how-to-avoid-java-code-in-jsp-files mingled cluttered duplicated code logic. Sun Oracle itself also recommends in the JSP coding conventions to avoid use of scriptlets.. JSP scriptlets are used if necessary to transform data also called value objects returned from processing the client's requests.. There's a standard functions taglib in JSTL but you can also easily create functions yourself . Here's an example how JSTL..
JSTL in JSF2 Facelets… makes sense? http://stackoverflow.com/questions/3342984/jstl-in-jsf2-facelets-makes-sense s and all those tags having a rendered attribute are also taghandlers. Also the id and binding attributes of JSF UI components.. otherwise you must turn off partial state saving. See also Communication in JSF 2.0 @ViewScoped fails in tag handlers To.. rendered # lpc.verbose ... h someComponent See also Conditionally displaying JSF components share improve this..
Reasons of getting a java.lang.VerifyError http://stackoverflow.com/questions/100107/reasons-of-getting-a-java-lang-verifyerror or testing environments HPUX the same error occurs. Also an automated testing machine running ubuntu shows the same error..
Type List vs type ArrayList in Java http://stackoverflow.com/questions/2279030/type-list-vs-type-arraylist-in-java myself I always use this . I am wondering if anyone uses 2 Also how often and can I please get an example does the situation..
Why is it a bad practice to call System.gc? http://stackoverflow.com/questions/2414105/why-is-it-a-bad-practice-to-call-system-gc a phone don't do it. You don't know what it's going to do. Also it's not guaranteed to do anything. The JVM may just entirely..
How to upload files to server using JSP/Servlet? http://stackoverflow.com/questions/2422468/how-to-upload-files-to-server-using-jsp-servlet names beforehand like as you would do with getParameter . Also normal form fields are since Servlet 3.0 available by getParameter..
http://stackoverflow.com/questions/2658922/xss-prevention-in-java headers cookies URL body parameters etc the whole request. Also the user controlled input which is stored in a database needs..
Overriding equals and hashCode in Java http://stackoverflow.com/questions/27581/overriding-equals-and-hashcode-in-java . append name rhs.name . append age rhs.age . isEquals Also remember When using a hash based Collection or Map such as HashSet..
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 Commons FileUpload to parse a multipart form data request. Also see this answer for examples of both the FileUpload and the..
Is it possible to use JSF+Facelets with HTML 4/5? http://stackoverflow.com/questions/2935759/is-it-possible-to-use-jsffacelets-with-html-4-5 4 and as far as I know HTML 5 do not support namespaces. Also HTML 5 has some new elements that are not available in XHTML... since they have no meaning in the client side. And Also HTML 5 has some new elements that are not available in XHTML..
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 in the hardware so it's much faster than in Java. Also Newton's Method still required use of doubles. A modified Newton's..
How do I set environment variables from Java? http://stackoverflow.com/questions/318239/how-do-i-set-environment-variables-from-java pass any ProcessBuilder s through it before starting them. Also you probably already know this but you can start more than one..
When to use LinkedList<> over ArrayList<>? http://stackoverflow.com/questions/322715/when-to-use-linkedlist-over-arraylist elements over either to make an opening or fill the gap. Also if you add more elements than the capacity of the underlying.. can be computed mathematically and accessed in O 1 . Also if you have large lists keep in mind that memory usage is also..
JSTL in JSF2 Facelets… makes sense? http://stackoverflow.com/questions/3342984/jstl-in-jsf2-facelets-makes-sense tags having a rendered attribute are also taghandlers. Also the id and binding attributes of JSF UI components are evaluated..
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 downloaded Java EE SDK then you already have Glassfish. Also note that for example Glassfish and JBoss AS are more than just..
Java Timer vs ExecutorService? http://stackoverflow.com/questions/409932/java-timer-vs-executorservice tasks what is the benefit of one using over another Also wanted to check if anyone had used the Timer class and ran into..
java wait cursor display problem http://stackoverflow.com/questions/6051755/java-wait-cursor-display-problem for me keep track of which panels may be at the forefront. Also the events are not always generated due to a mouse click. What..
How do you make a deep copy of an object in Java? http://stackoverflow.com/questions/64036/how-do-you-make-a-deep-copy-of-an-object-in-java that new instances are not created e.g. for singletons. Also this of course doesn't work if your classes aren't Serializable...
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..
How can I put a control in the JTableHeader of a JTable? http://stackoverflow.com/questions/7137786/how-can-i-put-a-control-in-the-jtableheader-of-a-jtable f.i. a tri state checkbox all de selected mixed content . Also de selecting must both be possible from mixed content. On second..
How does the Java for each loop work? http://stackoverflow.com/questions/85190/how-does-the-java-for-each-loop-work for any object that implements the Iterable interface . Also if the right hand side of the for idiom is an array rather than..
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