java Programming Glossary: thingLook and feel is not updating in Swing JTabbedPane http://stackoverflow.com/questions/11946604/look-and-feel-is-not-updating-in-swing-jtabbedpane this question Leveraging @Andrew's example and this old thing it seems to work for me. import java.awt.BorderLayout import..
How to get UTF-8 working in java webapps? http://stackoverflow.com/questions/138948/how-to-get-utf-8-working-in-java-webapps used in the request that it's set to UTF 8. The other thing done by this filter is to set the default response encoding.. 瓣 is encoded as E4 . Even though the page request everything is defined to use UTF 8 . The UTF 8 encoded version of 瓣 is..
Why is using a wild card with a Java import statement bad? http://stackoverflow.com/questions/147454/why-is-using-a-wild-card-with-a-java-import-statement-bad . If you import both using the wildcard method one of two things happens You have an outright naming conflict between java.awt.Event.. that much easier. If you're just doing a quick one off thing there's nothing explicitly wrong but future maintainers will.. If you're just doing a quick one off thing there's nothing explicitly wrong but future maintainers will thank you for your..
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 and is more up to date with the state of Android. First thing is to probably read the last part of this article which has.. int nativeSharedDirty The proportional set size for everything else. public int otherPss The private dirty pages used by everything.. public int otherPss The private dirty pages used by everything else. public int otherPrivateDirty The shared dirty pages used..
http://stackoverflow.com/questions/2707322/what-is-null-in-java is null in Java What is null Is null an instance of anything What set does null belong to How is it represented in the memory.. share improve this question Is null an instance of anything No there is no type which null is an instanceof . 15.20.2 Type.. but one can see that this design has the benefit of making things concise. Note that there is no problem with empty lines because..
http://stackoverflow.com/questions/299068/how-slow-are-java-exceptions possibility that my tests were wrong but I haven't seen anything out there in the way of code sample test comparisons or results.. try block takes no time whatsoever in most cases as everything is put on the stack which cleans up automatically if the method.. which makes try itself lightning fast actually nothing happens for try at all in general everything that needs to happen..
How do servlets work? Instantiation, session variables and multithreading http://stackoverflow.com/questions/3106452/how-do-servlets-work-instantiation-session-variables-and-multithreading and filters are shared among all requests. That's the nice thing of Java it's multithreaded and different threads read HTTP requests..
How to create a Java String from the contents of a file? http://stackoverflow.com/questions/326390/how-to-create-a-java-string-from-the-contents-of-a-file might be many gigabytes of RAM. Character encoding One thing that is missing from the sample in the original post is the..
What's the proper way to test a class with private methods using JUnit? http://stackoverflow.com/questions/34571/whats-the-proper-way-to-test-a-class-with-private-methods-using-junit The following patterns will let you do pretty much anything related to the private methods and fields. Of course you can't.. argClasses lets you look into private methods. The same thing applies for getDeclaredField . The setAccessible true is required..
Howto unescape a Java string literal in Java http://stackoverflow.com/questions/3537706/howto-unescape-a-java-string-literal-in-java admitted by the java.util.regex.Pattern.compile and everything that uses it including a e and especially cX . It has no support.. because no UTF 16 surrogate will wind up looking for anything they 胩e looking for. Like many of the other points their embarrassing.. standard java.util.regex.Pattern.compile function so everything works as expected. The string unescaper intentionally passes..
How are Anonymous (inner) classes used in Java? http://stackoverflow.com/questions/355167/how-are-anonymous-inner-classes-used-in-java public void actionPerformed ActionEvent e do something. Using this method makes coding a little bit quicker as I don't.. multiple anonymous inner classes that do exactly the same thing should be refactored to an actual class be it an inner class..
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 to file system frequently using database is the same thing to free up the memory. It could work but it's probably a lot.. a very good reason to say I need Xgb of memory for something and you can't work around it by improving your algorithms or..
http://stackoverflow.com/questions/40480/is-java-pass-by-reference this question Java is always pass by value. The difficult thing can be to understand that Java passes objects as references..
JFormattedTextField is not properly cleared http://stackoverflow.com/questions/4148336/jformattedtextfield-is-not-properly-cleared 0 tb.setText null tb.setCaretPosition 0 sudoku.print The thing is if i put a valid value in a text box then i go back and enter.. enforce only one integer per text box. Am I missing something really obvious java jtextfield sudoku keyevent jformattedtextfield..
How to parse XML using the SAX parser http://stackoverflow.com/questions/4827344/how-to-parse-xml-using-the-sax-parser interface so you can put it into a Bundle and do something with it. Now we need a class to hold our items. In this case.. public void end String body channel.setTitle body Same thing happens for the other elements of channel ex. On every item.. public void endDocument throws SAXException you can do something here for example send the Channel object somewhere or whatever...
Converting HTML files to PDF [closed] http://stackoverflow.com/questions/633780/converting-html-files-to-pdf is not. Do you have an idea EDIT The FlyingSaucer iText thing looks very promising. I will try to go with that. Thanks for..
What are the reasons why Map.get(Object key) is not (fully) generic http://stackoverflow.com/questions/857420/what-are-the-reasons-why-map-getobject-key-is-not-fully-generic key instead of V get K key and I'm wondering why same thing for remove containsKey containsValue . java generics collections.. of the method is possible to have a Map ArrayList Something and for me to call get with a LinkedList as argument and it..
Why is char[] preferred over String for passwords? http://stackoverflow.com/questions/8881291/why-is-char-preferred-over-string-for-passwords you're done with it you can overwrite the array with anything you like and the password won't be present anywhere in the system.. GC may clear all memory as it goes to avoid this sort of thing. Even if it does there's still the time during which the char..
What is a sensible prime for hashcode calculation? http://stackoverflow.com/questions/1835976/what-is-a-sensible-prime-for-hashcode-calculation 0 0 and 1 31 have the same value. I think that is a Bad Thing TM since small values occur often. For String.hashCode you'll..
How does a Java Arraylist contains() method evaluate objects? http://stackoverflow.com/questions/2642589/how-does-a-java-arraylist-contains-method-evaluate-objects variables stored in both objects are identical. ArrayList Thing basket new ArrayList Thing Thing thing new Thing 100 basket.add.. are identical. ArrayList Thing basket new ArrayList Thing Thing thing new Thing 100 basket.add thing Thing another new.. are identical. ArrayList Thing basket new ArrayList Thing Thing thing new Thing 100 basket.add thing Thing another new Thing..
http://stackoverflow.com/questions/2723397/java-generics-what-is-pecs it to be more flexible than just accepting a Collection Thing . Case 1 You want to go through the collection and do things.. list is a producer so you should use a Collection extends Thing . The reasoning is that a Collection extends Thing could hold.. extends Thing . The reasoning is that a Collection extends Thing could hold any subtype of Thing and thus each element will behave..
http://stackoverflow.com/questions/2790144/avoiding-instanceof-in-java The things I'm formatting are composite where a Thing1 can contain an array Thing2s and a Thing2 can contain an array.. are composite where a Thing1 can contain an array Thing2s and a Thing2 can contain an array of Thing1s. I had a problem.. where a Thing1 can contain an array Thing2s and a Thing2 can contain an array of Thing1s. I had a problem when I implemented..
What could cause java.lang.reflect.InvocationTargetException? http://stackoverflow.com/questions/6020719/what-could-cause-java-lang-reflect-invocationtargetexception .. catch AssertionError e ... catch Exception e .. Thing is that when it tries to invoke some method it throws InvocationTargetException..
Synchronizing on an Integer value [duplicate] http://stackoverflow.com/questions/659915/synchronizing-on-an-integer-value
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