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java Programming Glossary: veryWhy 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 an unsorted array Here is a piece of C code that seems very peculiar. For some strange reason sorting the data miraculously.. it can restart down the other path. If you guess right every time the train will never have to stop. If you guess wrong too.. you can restart down the other path. If you guess right every time the execution will never have to stop. If you guess wrong..
Why is Java Vector class considered obsolete or deprecated? http://stackoverflow.com/questions/1386275/why-is-java-vector-class-considered-obsolete-or-deprecated of locking even when you don't need to. Basically it's a very flawed approach to synchronization in most situations. As MrSpandex.. array collection implementation with the synchronize every operation bit is another example of poor design the decoration..
http://stackoverflow.com/questions/1688099/converting-json-to-java 'id' 3 'children' 'false' 'groups' In this string every JSON object contains an array of other JSON objects. The intention.. property represents an array of nested objects of the very same type. This can be parsed with Gson the following way package..
Why JSF calls getters multiple times http://stackoverflow.com/questions/2090033/why-jsf-calls-getters-multiple-times and the getter method behind the expression is executed everytime when the code calls ValueExpression#getValue . This will.. an EL expression and invoking a getter method is a very cheap operation so you should generally not worry about this.. getter method for some reason. This would be re executed everytime Getter methods in JSF backing beans should be designed that..
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 whatever numbers you get is extremely low. Pretty much every time I look at memory usage numbers with other engineers there.. int nativeSharedDirty The proportional set size for everything else. public int otherPss The private dirty pages used.. else. public int otherPss The private dirty pages used by everything else. public int otherPrivateDirty The shared dirty pages..
How to upload files to server using JSP/Servlet? http://stackoverflow.com/questions/2422468/how-to-upload-files-to-server-using-jsp-servlet FileUpload is still actively maintained and currently very mature. In order to use Apache Commons FileUpload you need to..
Avoiding “!= null” statements in Java? http://stackoverflow.com/questions/271526/avoiding-null-statements-in-java This is to avoid a NullPointerException . I find the code very ugly and it becomes unreadable. Is there a good alternative.. with my question. I want to address the necessity to test every object if you want to access a field or method of this object...
Is List<Dog> a subclass of List<Animal>? Why aren't Java's generics implicitly polymorphic? http://stackoverflow.com/questions/2745265/is-listdog-a-subclass-of-listanimal-why-arent-javas-generics-implicitly-p dogs.get 0 This should be safe right Suddenly you have a very confused cat. Now you can't add a Cat to a List extends Animal..
What is the reason behind “non-static method cannot be referenced from a static context”? http://stackoverflow.com/questions/290884/what-is-the-reason-behind-non-static-method-cannot-be-referenced-from-a-static cannot be referenced from a static context&rdquo The very common beginner mistake is when you try to use a class property.. would be grateful to know what's the reason behind it. The very core reason private java.util.List String someMethod Some Code..
How to call SOAP web service in Android http://stackoverflow.com/questions/297586/how-to-call-soap-web-service-in-android with Android. All I've been able to find are either very convoluted documents and references to kSoap2 and then some..
A better Java JSON library? [closed] http://stackoverflow.com/questions/338586/a-better-java-json-library
Why not use Double or Float to represent currency? http://stackoverflow.com/questions/3730019/why-not-use-double-or-float-to-represent-currency time I pose the question to you why I'm sure there is a very good reason I simply do not know what it is. P java floating..
http://stackoverflow.com/questions/4112686/how-to-use-servlets-and-ajax to use Servlets and Ajax I'm very new to web apps and Servlets and I have the following question..
Any good graphing packages for Android? [closed] http://stackoverflow.com/questions/424752/any-good-graphing-packages-for-android this question UPDATE Since this question was asked a few very nice open source native libraries have been created. These include..
read/write to Windows Registry using Java http://stackoverflow.com/questions/62289/read-write-to-windows-registry-using-java of this class are complicated but the class itself is very easy to use. For example the following code obtains the exact..
Remove Top-Level Container on Runtime http://stackoverflow.com/questions/6309407/remove-top-level-container-on-runtime heap. Additional examples are shown here . When memory is very limited I've used two approaches Emergent Loop from the command..
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 Do I really need to implement a new LayoutManager for every little variation on my layout If the answer to 4 is yes won't.. Do I really need to implement a new LayoutManager for every little variation on my layout yes there are LayoutManager with.. are LayoutManager with are powerful enough to satisfy a very good approximation to all layout needs . The big three are JGoodies..
What are the differences between BDD frameworks for Java? [closed] http://stackoverflow.com/questions/1068785/what-are-the-differences-between-bdd-frameworks-for-java my findings have a fairly short use by date. Concordion Very flexible Very pretty report output Nice plugin framework Poorly.. have a fairly short use by date. Concordion Very flexible Very pretty report output Nice plugin framework Poorly documented... seemed likely to end up tightly coupled to the html. EasyB Very shallow learning curve even for non Groovy Developers Extremely..
Things possible in IntelliJ that aren't possible in Eclipse? http://stackoverflow.com/questions/239732/things-possible-in-intellij-that-arent-possible-in-eclipse of those beans which you can inject into that property. Very smart autocomplete in Java code interface Person String getName..
http://stackoverflow.com/questions/3655316/browser-cant-access-find-relative-resources-like-css-images-and-links-when-cal you would probably like not to hardcode the context path. Very reasonable. You can obtain the context path in EL by pageContext.request.contextPath..
static allocation in java - heap, stack and permanent generation http://stackoverflow.com/questions/3849634/static-allocation-in-java-heap-stack-and-permanent-generation who can confirm these answers from first hand knowledge. Very few people have worked on recent HotSpot JVMs or studied them..
Sparse matrices / arrays in Java http://stackoverflow.com/questions/390181/sparse-matrices-arrays-in-java which requires that I build a very large 2 D sparse array. Very sparse if that makes a difference. Anyway the most crucial aspect..
Best way to encode text data for XML in Java? http://stackoverflow.com/questions/439298/best-way-to-encode-text-data-for-xml-in-java way to encode text data for XML in Java Very similar to this question except for Java. What is the recommended.. etc. java xml encoding share improve this question Very simply use an XML library. That way it will actually be right..
Very Large Numbers in Java Without using java.math.BigInteger http://stackoverflow.com/questions/5318068/very-large-numbers-in-java-without-using-java-math-biginteger Large Numbers in Java Without using java.math.BigInteger How..
Producing executable jar in NetBeans http://stackoverflow.com/questions/602537/producing-executable-jar-in-netbeans jar executable manifest share improve this question Very simple The .jar and .jad files are there in dist folder I was..
http://stackoverflow.com/questions/7146207/what-is-the-best-macro-benchmarking-tool-framework-to-measure-a-single-threade upon a logging framework can use AOP. Project Broadway Very general concept monitors observe predefined conditions and specify..
How do I create executable Java program? http://stackoverflow.com/questions/804466/how-do-i-create-executable-java-program class Dummy just to have another thing to pack in the jar Very simple just displays a window with Hello World Then compile..
Java Memory explained (SUN JVM) http://stackoverflow.com/questions/858250/java-memory-explained-sun-jvm About the Java HotSpot VM Java HotSpot VM Options A Very Long Collection of JVM Options Other Java Specialists newsletter..
Differences betweeen Exception and Error http://stackoverflow.com/questions/912334/differences-betweeen-exception-and-error the problem Unchecked Exception aka RuntimeException Very often a programming error such as a NullPointerException or..
Efficiency of Java “Double Brace Initialization”? http://stackoverflow.com/questions/924285/efficiency-of-java-double-brace-initialization this idiom too obscure to use in production code Summary Very very nice answers thanks everyone. On question 3 people felt.. a this value referencing the instance being constructed. Very neat. Overall DBI strikes me as something of an intellectual..
How to handle authentication/authorization with users in a database? http://stackoverflow.com/questions/9965708/how-to-handle-authentication-authorization-with-users-in-a-database is container specific. No fine grained control. Very spartan no remember me poor error handling no permission based..
Stand-alone Java code formatter/beautifier/pretty printer? http://stackoverflow.com/questions/996646/stand-alone-java-code-formatter-beautifier-pretty-printer as in changing whitespace or organizing import statements. Very little if any other refactoring is performed. A style checker..
Drawing a rectangle that won't disappear in next paint http://stackoverflow.com/questions/12683533/drawing-a-rectangle-that-wont-disappear-in-next-paint share improve this question Don't override paint WITHOUT VERY VERY good reason...use paintComponent instead Always call super.paintXxx.. improve this question Don't override paint WITHOUT VERY VERY good reason...use paintComponent instead Always call super.paintXxx..
Getting RGB value from under mouse cursor http://stackoverflow.com/questions/13061122/getting-rgb-value-from-under-mouse-cursor the color and RGB values in a window on the screen. I am VERY new to Java so do not know much of anything. I have two codes..
Java - Scroll to specific text inside JTextArea http://stackoverflow.com/questions/13437865/java-scroll-to-specific-text-inside-jtextarea jtextarea caret share improve this question This is a VERY basic example. This basically walks the document to find the..
http://stackoverflow.com/questions/13636623/jlayeredpane-with-a-jdialog with components already on the screen. Unless you have VERY good reason to be messing with this component I would suggest..
Platform.Runlater and Task Javafx http://stackoverflow.com/questions/13784333/platform-runlater-and-task-javafx so i have been doing some research on this but i am still VERY confused to say the least. Can anyone give me a concrete example..
Java socket swingWorker running but no message received or transmitted http://stackoverflow.com/questions/14617331/java-socket-swingworker-running-but-no-message-received-or-transmitted swingworker share improve this question Here's a VERY basic example. Basically because you program requires asynchronous..
DefaultAnnotationHandlerMapping via ContextLoaderListener instead of DispatcherServlet on Spring 3 http://stackoverflow.com/questions/1464881/defaultannotationhandlermapping-via-contextloaderlistener-instead-of-dispatchers application loads fine. However I have a problem with one VERY important bean context component scan base package com.mydomain..
java change the document in DocumentListener http://stackoverflow.com/questions/14727548/java-change-the-document-in-documentlistener state hence the exception Updated with an example This is VERY basic example...It doesn't handle insert or remove but my testing..
Overriding the java equals() method quirk http://stackoverflow.com/questions/185937/overriding-the-java-equals-method-quirk the equals Book b method no longer works. This took a VERY long time to track down without a good debugger and assuming..
How to write console output to a txt file http://stackoverflow.com/questions/1994255/how-to-write-console-output-to-a-txt-file the file a line out.println lineFromInput close the file VERY IMPORTANT out.close catch IOException e1 System.out.println..
MySQL jdbc driver and Eclipse: ClassNotFoundexception com.mysql.jdbc.Driver http://stackoverflow.com/questions/2353141/mysql-jdbc-driver-and-eclipse-classnotfoundexception-com-mysql-jdbc-driver ClassNotFoundexception com.mysql.jdbc.Driver There is a VERY similar question to mine but in my case I don't have any duplicate..
Difference between synchronization of field reads and volatile http://stackoverflow.com/questions/3103204/difference-between-synchronization-of-field-reads-and-volatile AND serialisation of protected code sections. For VERY simple situations volatile is enough however it is easy to get..
How come invoking a (static) method on a null reference doesn't throw NullPointerException? http://stackoverflow.com/questions/3293353/how-come-invoking-a-static-method-on-a-null-reference-doesnt-throw-nullpointe member via an object reference expression but this is VERY misleading since this is NOT the actual semantics of a static..
How to do a fractional power on BigDecimal in Java? http://stackoverflow.com/questions/3579779/how-to-do-a-fractional-power-on-bigdecimal-in-java to do something like Math.pow 7777.66 5555.44 only with VERY big numbers. I came across a few solutions Use double but the..
Sparse matrices / arrays in Java http://stackoverflow.com/questions/390181/sparse-matrices-arrays-in-java an object. I need to be able to modify cell contents VERY quickly. Anyway Does anyone know a particularly good library..
Does assigning objects to null in Java impact garbage collection? http://stackoverflow.com/questions/449409/does-assigning-objects-to-null-in-java-impact-garbage-collection like all things it depends. The GC in Java these days is VERY good and everything should be cleaned up very shortly after..
java events,handlers and listeners question http://stackoverflow.com/questions/4818851/java-events-handlers-and-listeners-question having trouble implementing it in my design since i am VERY new to java and events. Please assist me when you can and it..
Android run bash command in app http://stackoverflow.com/questions/7543700/android-run-bash-command-in-app script into my app and then run it For instance this is a VERY simplified example # system bin sh # if f sdcard hello.txt then..
Convert Date/Time for given Timezone - java http://stackoverflow.com/questions/7670355/convert-date-time-for-given-timezone-java TimeZone Date GregorianCalendar etc. to try to do this VERY basic task. This code does what I want for the CURRENT TIME..
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