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java Programming Glossary: heDo you ever use the volatile keyword in Java? http://stackoverflow.com/questions/106591/do-you-ever-use-the-volatile-keyword-in-java you ever use the volatile keyword in Java In work today I came across the volatile.. the volatile keyword in Java In work today I came across the volatile keyword in Java. Not being very familiar with it I.. very familiar with it I found this explaination Java theory and practice Managing volatility Given the detail in which..
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 that seems very peculiar. For some strange reason sorting the data miraculously speeds up the code by almost 6x #include algorithm.. strange reason sorting the data miraculously speeds up the code by almost 6x #include algorithm #include ctime #include.. unsigned c 0 c arraySize c data c std rand 256 With this the next loop runs faster std sort data data arraySize Test clock_t..
http://stackoverflow.com/questions/12641887/swingworker-in-java a problem. I have a JFrame . It will create a JDialog . When button on JDialog is pressed it should be disposed and an email.. it should be disposed and an email should be sent. At the same time I need another JDialog to appear with indetermined.. and an email should be sent. At the same time I need another JDialog to appear with indetermined JProgressBar . When email..
Interview : Can we instantiate abstract class? http://stackoverflow.com/questions/13670991/interview-can-we-instantiate-abstract-class Can we instantiate abstract class The interviewer asked Can we instantiate an abstract class I said.. said No. He told me Wrong we can. I argued a bit on this. Then he told me to try this yourself at your home. abstract class.. No. He told me Wrong we can. I argued a bit on this. Then he told me to try this yourself at your home. abstract class my..
http://stackoverflow.com/questions/1637752/netty-vs-apache-mina vs Apache MINA Pros Cons of using either They both provide roughly the.. vs Apache MINA Pros Cons of using either They both provide roughly the same functionality. Which should.. vs Apache MINA Pros Cons of using either They both provide roughly the same functionality. Which should I..
whats the difference between “.equals and ==” http://stackoverflow.com/questions/1643067/whats-the-difference-between-equals-and the difference between &ldquo .equals and &rdquo I switched lecturers.. the difference between &ldquo .equals and &rdquo I switched lecturers today and he stated using a weird code to me. He.. &ldquo .equals and &rdquo I switched lecturers today and he stated using a weird code to me. He said its better to use .equals..
Is there a way to simulate the C++ 'friend' concept in Java? http://stackoverflow.com/questions/182278/is-there-a-way-to-simulate-the-c-friend-concept-in-java there a way to simulate the C 'friend' concept in Java I would.. there a way to simulate the C 'friend' concept in Java I would like to be able to write.. which can access non public methods of a class in another package without having to make it a subclass of the other class...
Choosing a Java Web Framework now? [closed] http://stackoverflow.com/questions/2084169/choosing-a-java-web-framework-now a Java Web Framework now closed we are in the planning stage of migrating a large website which is built on.. Any insights on using Spring Roo or Play will be very helpful. I did find similar posts like this but it is more than.. it is more than a year old. Things have surely changed in the mean time EDIT 1 Thanks for the great answers This site is turning..
How to handle calendar TimeZones using Java? http://stackoverflow.com/questions/230126/how-to-handle-calendar-timezones-using-java I have a Timestamp value that comes from my application. The user can be in any given local TimeZone. Since this date is.. Since this date is used for a WebService that assumes the time given is always in GMT I have a need to convert the user's.. the time given is always in GMT I have a need to convert the user's parameter from say EST to GMT . Here's the kicker The..
How to properly override clone method? http://stackoverflow.com/questions/2326758/how-to-properly-override-clone-method in one of my objects which has no superclass. What is the best way to handle the checked CloneNotSupportedException thrown.. which has no superclass. What is the best way to handle the checked CloneNotSupportedException thrown by the superclass.. has no superclass. What is the best way to handle the checked CloneNotSupportedException thrown by the superclass which..
how to obtain mouse click coordinates outside my window in Java http://stackoverflow.com/questions/2419555/how-to-obtain-mouse-click-coordinates-outside-my-window-in-java I need to implement a class using Swing which can obtain the mouse coordinates when the user clicks anywhere on the screen... class using Swing which can obtain the mouse coordinates when the user clicks anywhere on the screen. if I wanted to obtain.. using Swing which can obtain the mouse coordinates when the user clicks anywhere on the screen. if I wanted to obtain the..
Why does this go into an infinite loop? http://stackoverflow.com/questions/3831341/why-does-this-go-into-an-infinite-loop does this go into an infinite loop I'm a teacher and yesterday a student wrote the following code public class.. loop I'm a teacher and yesterday a student wrote the following code public class Tests public static void main String.. int x 0 while x 3 x x System.out.println x We know he should have writen just x or x x 1 but on x x it should first..
If profiler is not the answer, what other choices do we have? http://stackoverflow.com/questions/4387895/if-profiler-is-not-the-answer-what-other-choices-do-we-have profiler is not the answer what other choices do we have After watching the presentation.. profiler is not the answer what other choices do we have After watching the presentation Performance.. the answer what other choices do we have After watching the presentation Performance Anxiety of Joshua Bloch I read the..
How can I protect MySQL username and password from decompiling? http://stackoverflow.com/questions/442862/how-can-i-protect-mysql-username-and-password-from-decompiling easily. How can I protect my database if I have to use the login data in the code java mysql security reverse engineering.. I protect my database if I have to use the login data in the code java mysql security reverse engineering decompiling .. passwords into your code. This was brought up recently in the Top 25 Most Dangerous Programming Mistakes Hard coding a secret..
How to make a JButton in a JTable cell click-able? http://stackoverflow.com/questions/5555938/how-to-make-a-jbutton-in-a-jtable-cell-click-able click able I have a JTable with a custom cell renderer. The cell is a JPanel that contains a JTextField and a JButton. The.. is a JPanel that contains a JTextField and a JButton. The JTextField contains an integer and when the user clicks on the.. and a JButton. The JTextField contains an integer and when the user clicks on the JButton the integer should be increased...
The case against checked exceptions http://stackoverflow.com/questions/613954/the-case-against-checked-exceptions case against checked exceptions For a number of years now I.. case against checked exceptions For a number of years now I have been unable.. of years now I have been unable to get a decent answer to the following question why are some developers so against checked..
How to convert Milliseconds to “X mins, x seconds” in Java? http://stackoverflow.com/questions/625433/how-to-convert-milliseconds-to-x-mins-x-seconds-in-java &ldquo X mins x seconds&rdquo in Java I want to record the time using System.currentTimeMillis when a user begins something.. I want to record the time using System.currentTimeMillis when a user begins something in my program. When he finishes I will.. when a user begins something in my program. When he finishes I will subtract the current System.currentTimeMillis..
Programatically Hide/Show Android Soft Keyboard [duplicate] http://stackoverflow.com/questions/7200281/programatically-hide-show-android-soft-keyboard Keyboard duplicate Possible Duplicate How to close hide the Android Soft Keyboard First thing first I already saw this thread... I already saw this thread. I tried accepted methods given there..But nothing worked for me.. I have two screens in my app... Second one have one ListView and an EditText to filter the listView In my first screen I want username EditText to have..
Update data in ListFragment as part of ViewPager http://stackoverflow.com/questions/7379165/update-data-in-listfragment-as-part-of-viewpager data in ListFragment as part of ViewPager I'm using the v4 compatibility ViewPager in Android. My FragmentActivity has.. pages in my ViewPager. So far I just have 3 instances of the same ListFragment but in the future I will have 3 instances.. I just have 3 instances of the same ListFragment but in the future I will have 3 instances of different ListFragments. The..
Eclipse reported “Failed to load JNI shared library” [duplicate] http://stackoverflow.com/questions/10585135/eclipse-reported-failed-to-load-jni-shared-library on YouTube Eclipse Failed to load JNI library fix . He says that you only have to download a JRE 7 folder. Then I just..
Interview : Can we instantiate abstract class? http://stackoverflow.com/questions/13670991/interview-can-we-instantiate-abstract-class asked Can we instantiate an abstract class I said No. He told me Wrong we can. I argued a bit on this. Then he told me.. public static void main String a my m new my m.mymethod Here I'm creating instance of my class and calling method of abstract.. oop class object abstract share improve this question Here i'm creating instance of my class No you are not creating..
Is it feasible to create a REST client with Flex? http://stackoverflow.com/questions/153420/is-it-feasible-to-create-a-rest-client-with-flex DELETE and is a work around that has been around a while. Here's a snippet but there's much more discussion. If I were building.. post in 2007 by Nathan de Vries we see this discussed. He followed up that blog post and discussion with his own comment.. supplied with the Flex 3 beta now support the responseHeaders property on instances of HTTPStatusEvent. I'm hoping that..
whats the difference between “.equals and ==” http://stackoverflow.com/questions/1643067/whats-the-difference-between-equals-and lecturers today and he stated using a weird code to me. He said its better to use .equals and when i asked why he answered..
How to handle calendar TimeZones using Java? http://stackoverflow.com/questions/230126/how-to-handle-calendar-timezones-using-java need to convert the user's parameter from say EST to GMT . Here's the kicker The user is oblivious to his TZ. He enters the.. GMT . Here's the kicker The user is oblivious to his TZ. He enters the creation date that he wants to send to the WS so.. Created GMT cal with date gmtCal.getTime return gmtCal Here's the output if I pass the current time 12 09 05 EDT from..
How to properly override clone method? http://stackoverflow.com/questions/2326758/how-to-properly-override-clone-method Java 2nd Edition Item 11 Override clone judiciously . He recommends instead to use a copy constructor or copy factory... instead to use a copy constructor or copy factory. He went on to write pages of pages on how if you feel you must..
Any simple way to explain why I cannot do List<Animal> animals = new ArrayList<Dog>()? [duplicate] http://stackoverflow.com/questions/2346763/any-simple-way-to-explain-why-i-cannot-do-listanimal-animals-new-arraylistd declare this as List Animal and hand it to a colleague. He not unreasonably believes he can put a Cat in it. He then gives.. He not unreasonably believes he can put a Cat in it. He then gives it back to you and you now have a list of Dogs with..
How do I keep a scanner from throwing exceptions when the wrong type is entered? (java) http://stackoverflow.com/questions/2496239/how-do-i-keep-a-scanner-from-throwing-exceptions-when-the-wrong-type-is-entered throwing exceptions when the wrong type is entered java Here's some sample code import java.util.Scanner class In public.. returns 0 scanner is now at just before the third enter . Here's an example of putting some of these things together. You.. s is d years old name age Let's say the input is He is probably close to 100 now... enter Elvis of course enter..
http://stackoverflow.com/questions/2790144/avoiding-instanceof-in-java it isn't even logically the right place to put the code. He recommends the 'instanceof' approach as being the lesser of..
How do Java Interfaces simulate multiple inheritance? http://stackoverflow.com/questions/3556652/how-do-java-interfaces-simulate-multiple-inheritance decides to sell pizzas from the back of a delivery truck. He wants a thing where he can driveTo and cook with. In C he would.. kitchen to the truck in a member variable called kitchen. He implements the Kitchen interface by calling kitchen.cook . class.. public void cook Food foodItem kitchen.cook foodItem He is a happy man because he can now do things like pizzaTruck.driveTo..
http://stackoverflow.com/questions/415580/regex-named-groups-in-java points out in the comment that the support is limited. He details the limitations in his great answer Java Regex Helper.. He details the limitations in his great answer Java Regex Helper Java7 regex named group support was presented back in September..
Conveniently map between enum and int / String http://stackoverflow.com/questions/5021246/conveniently-map-between-enum-and-int-string to yours with an int value as part of the enum definition. He then goes on to create a generics based lookup utility public..
Java library to compare image similarity http://stackoverflow.com/questions/8644960/java-library-to-compare-image-similarity Java though sorry. I hope it's a good starting point EDIT Here's someone with your problem who wrote his own comparison class.. class in Java . I didn't read the source code though. He expressly states that he couldn't find Java libraries for that..
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