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java Programming Glossary: mostWhy 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.. it's a very flawed approach to synchronization in most situations. As MrSpandex pointed out you can decorate a collection..
How to round a number to n decimal places in Java http://stackoverflow.com/questions/153724/how-to-round-a-number-to-n-decimal-places-in-java previous number. This is the standard method of rounding most people expect in most situations. I also would like only significant.. is the standard method of rounding most people expect in most situations. I also would like only significant digits to be..
Java web development, what skills do I need? [closed] http://stackoverflow.com/questions/1958808/java-web-development-what-skills-do-i-need on JSF and eventually also in combination with JPA however most of those are still targeted on Java EE 5. Have a look at Amazon.com.. Have a look at Amazon.com and ensure that you choose the most recent book covering the subject. Thus not an old book for JSF..
What is a Null Pointer Exception? http://stackoverflow.com/questions/218384/what-is-a-null-pointer-exception creating the object you get a NullPointerException. In the most trivial cases the compiler will catch the problem and let you..
How to upload files to server using JSP/Servlet? http://stackoverflow.com/questions/2422468/how-to-upload-files-to-server-using-jsp-servlet fileupload.jar commons io.jar Your initial attempt failed most likely because you forgot the commons IO. Here's a kickoff example.. to collect the individual multipart form data items most Servlet 3.0 implementations use Apache Commons FileUpload under..
How to call SOAP web service in Android http://stackoverflow.com/questions/297586/how-to-call-soap-web-service-in-android generating the plumbing classes. I just need the easiest most elegant way to contact a WSDL based web service from an Android..
Download a file with Android, and showing the progress in a ProgressDialog http://stackoverflow.com/questions/3028306/download-a-file-with-android-and-showing-the-progress-in-a-progressdialog are many ways to download files. Following I will post most common ways it is up to you to decide which method is better..
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 using this idiom for some time now. And it seems to be the most wide spread at least in the sites I've visited. Does anyone..
A better Java JSON library? [closed] http://stackoverflow.com/questions/338586/a-better-java-json-library projects that can convert Java objects to JSON. However most of them require that you place Java annotations in your classes..
Design Patterns web based applications http://stackoverflow.com/questions/3541077/design-patterns-web-based-applications of a mix of design patterns. I'll mention only the most important ones. Model View Controller pattern The core architectural.. have to gather convert and validate the request parameters mostly yourself. The View can be represented by plain vanilla HTML..
Why not use Double or Float to represent currency? http://stackoverflow.com/questions/3730019/why-not-use-double-or-float-to-represent-currency Because floats and doubles cannot accurately represent most base 10 rational numbers. This is how an IEEE 754 floating point..
Best XML parser for Java [closed] http://stackoverflow.com/questions/373833/best-xml-parser-for-java for Java closed I need to read smallish few MB at the most UTF 8 encoded XML files rummage around looking at various elements..
http://stackoverflow.com/questions/4112686/how-to-use-servlets-and-ajax like jQuery Prototype Mootools . Since jQuery is the most popular here's a basic kickoff example based on jQuery. JSP..
http://stackoverflow.com/questions/469695/decode-base64-data-in-java supported by Sun. EDIT Who knew this would be the most controversial answer I'd ever post I do know that sun. packages..
Using JFreeChart to display recent changes in a time series http://stackoverflow.com/questions/5048852/using-jfreechart-to-display-recent-changes-in-a-time-series time series How can I use JFreeChart to display just the most recent data in a continually updated time series Addednum A..
Most elegant way to generate prime numbers http://stackoverflow.com/questions/1042902/most-elegant-way-to-generate-prime-numbers elegant way to generate prime numbers What is the most elegant..
Sort on a string that may contain a number http://stackoverflow.com/questions/104599/sort-on-a-string-that-may-contain-a-number sort strings with numbers differently than software. Most sorting algorithms compare ASCII values which produces an ordering..
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 it. This is more or less how branch predictors work. Most applications have well behaved branches. So modern branch predictors..
Which overload will get selected for null in Java? http://stackoverflow.com/questions/1545501/which-overload-will-get-selected-for-null-in-java in the spec 15.12.2 and in particular Choosing the Most Specific Method . Without getting into the details which you..
Difference between DTO, VO, POJO, JavaBeans? http://stackoverflow.com/questions/1612334/difference-between-dto-vo-pojo-javabeans but Fowler uses VOs to mean something else as we saw . Most of time they follow the JavaBeans conventions and are thus JavaBeans..
How can I enumerate all classes in a package and add them to a List? http://stackoverflow.com/questions/176527/how-can-i-enumerate-all-classes-in-a-package-and-add-them-to-a-list on the web for class files in plain old directories. Most of us these days work with JAR files. To get things working..
How do I time a method's execution in Java? http://stackoverflow.com/questions/180158/how-do-i-time-a-methods-execution-in-java class for things like timing how long a task takes etc Most of the searches on Google return results for timers that schedule..
http://stackoverflow.com/questions/2181774/calling-clojure-from-java clojure from java Most of the top google hits for calling clojure from java are outdated..
How to properly override clone method? http://stackoverflow.com/questions/2326758/how-to-properly-override-clone-method improve this question Do you absolutely have to use clone Most people agree that Java's clone is broken. Josh Bloch on Design..
How do you determine the ideal buffer size when using FileInputStream? http://stackoverflow.com/questions/236861/how-do-you-determine-the-ideal-buffer-size-when-using-fileinputstream buffer used to read from the files to maximize performance Most everyone is familiar with the basic code which I'll repeat here.. file system block size CPU cache size and cache latency. Most file systems are configured to use block sizes of 4096 or 8192...
Is there a goto statement in java? http://stackoverflow.com/questions/2545103/is-there-a-goto-statement-in-java there a goto statement in java I'm confused about this. Most of us have been told that there is no goto statement in Java...
How do I “decompile” Java class files? http://stackoverflow.com/questions/272535/how-do-i-decompile-java-class-files decompiler written by Mr. Pavel Kouznetsov is JDK1.3 . Most of the Java decompilers downloadable today from the Internet..
What are the pros and cons of the leading Java HTML parsers? http://stackoverflow.com/questions/3152138/what-are-the-pros-and-cons-of-the-leading-java-html-parsers to be found in the features of the parser in question. Most parsers are to a certain degree forgiving and lenient with non..
Difference between Statement and PreparedStatement http://stackoverflow.com/questions/3271249/difference-between-statement-and-preparedstatement as a Statement. The Prepared Statement may be parametrized Most relational databases handles a JDBC SQL query in four steps..
A better Java JSON library? [closed] http://stackoverflow.com/questions/338586/a-better-java-json-library can not do if you do not have access to the source code. Most also do not fully support the use of Java Generics. Gson considers..
Java EE 6: How to implement “Stay Logged In” when user login in to the web application http://stackoverflow.com/questions/5082846/java-ee-6-how-to-implement-stay-logged-in-when-user-login-in-to-the-web-appli Form based authentication provided by GlassFish v3 btw. Most of the website when the user about to provide the username and..
How do synchronized static methods work in Java? http://stackoverflow.com/questions/578904/how-do-synchronized-static-methods-work-in-java and Concurrency chapter in the Hibernate documentation. Most of the times the problems you're trying to solve have been solved..
Java: checked vs unchecked exception explanation http://stackoverflow.com/questions/6115896/java-checked-vs-unchecked-exception-explanation stops you from catching the unchecked exception as well Most often because people are lazy to consider what to catch and..
How to best position Swing GUIs http://stackoverflow.com/questions/7143287/how-to-best-position-swing-guis shown without programmatically setting its location. Most windowing systems cascade windows if their locations are not..
How many threads can a Java VM support? http://stackoverflow.com/questions/763579/how-many-threads-can-a-java-vm-support server have 6500 Threads before bringing the machine down. Most of the threads were not doing anything of course. Once the machine..
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