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java Programming Glossary: that'sHow to read a single char from the console in Java (as the user types it)? http://stackoverflow.com/questions/1066318/how-to-read-a-single-char-from-the-console-in-java-as-the-user-types-it thread here . One of the suggestions is to use JNI. Again that's not very portable. Another suggestion at the end of the thread..
StringBuilder vs String concatenation in toString() in Java http://stackoverflow.com/questions/1532461/stringbuilder-vs-string-concatenation-in-tostring-in-java builder At the point where you're concatenating in a loop that's usually when the compiler can't substitute StringBuilder by..
Why JSF calls getters multiple times http://stackoverflow.com/questions/2090033/why-jsf-calls-getters-multiple-times only once at some point of request based JSF lifecycle and that's exactly what you want. Here is a summary of all different right..
What is a stack overflow error? http://stackoverflow.com/questions/214741/what-is-a-stack-overflow-error Thanks a lot oh I'm using the acm libraries I think if that's any help java exception handling stackoverflow share improve..
getResourceAsStream() vs FileInputStream http://stackoverflow.com/questions/2308188/getresourceasstream-vs-fileinputstream add its full path to the classpath in an IDE like Eclipse that's the src folder and the build path respectively . This way you..
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 element which you'd like to press programmatically because that's usually been used in the server side to distinguish if a button..
How to call SOAP web service in Android http://stackoverflow.com/questions/297586/how-to-call-soap-web-service-in-android then some bit about parsing it all manually with SAX . OK that's fine but it's 2008 so I figured there should be some good library..
Design Patterns web based applications http://stackoverflow.com/questions/3541077/design-patterns-web-based-applications I'll restrict myself to request based MVC since that's easier to implement. Front Controller pattern Mediator pattern..
What is a stack trace, and how can I use it to debug my application errors? http://stackoverflow.com/questions/3988788/what-is-a-stack-trace-and-how-can-i-use-it-to-debug-my-application-errors What is a stack trace What can it tell me about the error that's happening in my program About this question quite often I see.. we should look at MyEntityService.java on line 59 because that's where this error originated this one's a bit obvious what went..
Java string to date conversion http://stackoverflow.com/questions/4216745/java-string-to-date-conversion date time share improve this question Don't do it that's the hard way. Just use SimpleDateFormat click the link to see..
How to internationalize a Java web application? http://stackoverflow.com/questions/4276061/how-to-internationalize-a-java-web-application with a custom Control to load those files as UTF 8 but that's unfortunately not supported by the basic JSTL fmt taglib. You..
http://stackoverflow.com/questions/469695/decode-base64-data-in-java for a class that that was included with Sun Java 6 and that's what I was trying to answer. I agree that Commons is the best..
Why are only final variables accessible in anonymous class? http://stackoverflow.com/questions/4732544/why-are-only-final-variables-accessible-in-anonymous-class to be working with an out of date variable because that's effectively what would be happening... you'd be working with..
Implementing back/forward buttons in Swing http://stackoverflow.com/questions/5654926/implementing-back-forward-buttons-in-swing a card layout but I think this approach should work and that's what's so annoying. It may be worth noting that I'm using a..
Why is super.super.method(); not allowed in Java? http://stackoverflow.com/questions/586363/why-is-super-super-method-not-allowed-in-java What do you guys think EDIT To clarify yes I know that's impossible in Java and I don't really miss it. This is nothing..
How should I load Jars dynamically at runtime? http://stackoverflow.com/questions/60764/how-should-i-load-jars-dynamically-at-runtime a way of doing it by writing your own ClassLoader but that's a lot of work for something that should in my mind at least..
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 it action only in addition to the content use a widget that's clearer f.i. a tri state checkbox all de selected mixed content..
Java String.equals versus == [duplicate] http://stackoverflow.com/questions/767372/java-string-equals-versus datos 0 ... NB the compare is done on 'usuario' because that's guaranteed non null in your code although you should still check..
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 But when i RESIZE my JFrame by pulling the Right Side that's when unexpected behaviour of my Application is shown in the..
Instantiating a generic class in Java http://stackoverflow.com/questions/1090458/instantiating-a-generic-class-in-java pass a factory to the constructor of the generic class. That's more flexible and you don't need to worry about the reflection..
Why is Java Vector class considered obsolete or deprecated? http://stackoverflow.com/questions/1386275/why-is-java-vector-class-considered-obsolete-or-deprecated Vector synchronizes on each individual operation. That's almost never what you want to do. Generally you want to synchronize..
Why is the Java main method static? http://stackoverflow.com/questions/146576/why-is-the-java-main-method-static to instantiate a class before the entry point is called. That's why main is static. I have no idea why main is always marked..
getResourceAsStream() vs FileInputStream http://stackoverflow.com/questions/2308188/getresourceasstream-vs-fileinputstream or guess the absolute path in Java web applications. That's only portability trouble i.e. it runs in system X but not in..
How to retrieve and display images from a database in a JSP page? http://stackoverflow.com/questions/2340406/how-to-retrieve-and-display-images-from-a-database-in-a-jsp-page null try connection.close catch SQLException logOrIgnore That's it. Another example and more hints can be found in this article..
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 suggested that calling gc may return memory to the system. That's certainly not necessarily true the Java heap itself grows independently..
How to access java-classes in the default-package? http://stackoverflow.com/questions/283816/how-to-access-java-classes-in-the-default-package default package using a syntax like this import Unfinished That's no longer allowed . So to access a default package class from..
Validating input using java.util.Scanner http://stackoverflow.com/questions/3059333/validating-input-using-java-util-scanner a positive number while sc.hasNextInt System.out.println That's not a number sc.next this is important number sc.nextInt while.. an example session Please enter a positive number five That's not a number 3 Please enter a positive number 5 Thank you Got.. vowel lowercase while sc.hasNext aeiou System.out.println That's not a vowel sc.next String vowel sc.next System.out.println..
How do servlets work? Instantiation, session variables and multithreading http://stackoverflow.com/questions/3106452/how-do-servlets-work-instantiation-session-variables-and-multithreading that Servlets and filters are shared among all requests. That's the nice thing of Java it's multithreaded and different threads.. will be shared among all other requests in other sessions. That's threadunsafe The below example illustrates that public class..
What is the purpose of the expression “new String(…)” in Java? http://stackoverflow.com/questions/390703/what-is-the-purpose-of-the-expression-new-string-in-java value string.value offset string.offset count string.count That's right no copy of the underlying array there. And yet it still..
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 You can and should not disable the browser back button. That's bad for user experience. There are JavaScript hacks but they..
Why does JSF need to save the state of UI components on the server side? http://stackoverflow.com/questions/5474316/why-does-jsf-need-to-save-the-state-of-ui-components-on-the-server-side data to managed beans enough Can should I try to avoid it That's not enough to ensure the integrity and robustness of JSF. JSF..
Why is super.super.method(); not allowed in Java? http://stackoverflow.com/questions/586363/why-is-super-super-method-not-allowed-in-java item.isBig throw new NotBigItemException super.add item That's fine RedItems can always be confident that the items it contains..
Why are static variables considered evil? http://stackoverflow.com/questions/7026507/why-are-static-variables-considered-evil this question Static variables represent global state. That's hard to reason about and hard to test if I create a new instance..
How do I accept a self-signed certificate with a Java HttpsURLConnection? http://stackoverflow.com/questions/859111/how-do-i-accept-a-self-signed-certificate-with-a-java-httpsurlconnection authority store and that will allow Java to accept it. That's not an approach I want to take if I can help it seems very invasive..
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