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java Programming Glossary: howeverWhy 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 ... NNNNNNNTTTTTTTTT ... TTTTTTTTTT easy to predict However when the data is completely random the branch predictor is rendered..
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 DecimalFormat #.##### df.format 0.912385 returns 0.91238 However as you can see this uses half even rounding. That is it will..
Why JSF calls getters multiple times http://stackoverflow.com/questions/2090033/why-jsf-calls-getters-multiple-times component is an input or output component learn it here . However this count can get up much higher when used in iterating JSF.. so you should generally not worry about this at all. However the story changes when you're performing expensive DB business..
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 uses of it . That is pretty much the SDK APIs for this. However there is more you can do as a developer with your device. Using..
getResourceAsStream() vs FileInputStream http://stackoverflow.com/questions/2308188/getresourceasstream-vs-fileinputstream a FileNotFound exception when I used FileInputStream . However using the same path I was able to load the file when I did getResourceAsStream.. way System.out.println new File . .getAbsolutePath However the working directory is in no way programmatically controllable...
How to upload files to server using JSP/Servlet? http://stackoverflow.com/questions/2422468/how-to-upload-files-to-server-using-jsp-servlet input type file name file input type submit form However I only get the file name not the file content. When I add enctype.. body yourself based on ServletRequest#getInputStream . However this is a precise and tedious work which requires precise knowledge..
What is a raw type and why shouldn't we use it? http://stackoverflow.com/questions/2770321/what-is-a-raw-type-and-why-shouldnt-we-use-it be tempting to just say that they're just List instead. However there is a major difference since a List E defines only add..
What is a serialVersionUID and why should I use it? http://stackoverflow.com/questions/285793/what-is-a-serialversionuid-and-why-should-i-use-it in the Java TM Object Serialization Specification. However it is strongly recommended that all serializable classes explicitly..
When to use LinkedList<> over ArrayList<>? http://stackoverflow.com/questions/322715/when-to-use-linkedlist-over-arraylist are also stored. ArrayLists don't have this overhead. However ArrayLists take up as much memory as is allocated for the capacity..
JSTL in JSF2 Facelets… makes sense? http://stackoverflow.com/questions/3342984/jstl-in-jsf2-facelets-makes-sense JSTL tags seem to work fine c if test lpc.verbose ... c if However I'm not sure if this is a best practice Is there another way..
A better Java JSON library? [closed] http://stackoverflow.com/questions/338586/a-better-java-json-library source projects that can convert Java objects to JSON. However most of them require that you place Java annotations in your..
Why not use Double or Float to represent currency? http://stackoverflow.com/questions/3730019/why-not-use-double-or-float-to-represent-currency and software will round it to 0.1 when displaying it. However as you perform more additions subtractions multiplications and..
http://stackoverflow.com/questions/4112686/how-to-use-servlets-and-ajax the keyword is ajax Asynchronous JavaScript and XML . However last years it's more than often Asynchronous JavaScript and..
Any good graphing packages for Android? [closed] http://stackoverflow.com/questions/424752/any-good-graphing-packages-for-android chart with a HTTP get which seems like a fine workaround. However our eventual expected application usage is in a poor connectivity..
Migrating from JSF 1.2 to JSF 2.0 http://stackoverflow.com/questions/4441713/migrating-from-jsf-1-2-to-jsf-2-0 just have to follow Facelets 1.x to 2.x migration steps. However there's a PrimeFaces 2.x to 3.x migration guide which might..
http://stackoverflow.com/questions/469695/decode-base64-data-in-java and I do know about Commons and use it all the time. However the poster asked for a class that that was included with Sun..
http://stackoverflow.com/questions/5853879/swing-obtain-image-of-jframe the coordinates and dimensions of the JFrame involved. However I believe that there is a better way Swing components by default..
How to upload a file using Java HttpClient library working with PHP - strange problem http://stackoverflow.com/questions/1067655/how-to-upload-a-file-using-java-httpclient-library-working-with-php-strange-pr was succesfull I was able to communicate with server however PHP didn't notice the file the method is_uploaded_file returned.. was even more unclear is_uploaded_file returned false however _FILES array was filled with proper data. java php httpclient..
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 .5g n 0.912385 returns 0.91239 which is great however it always displays numbers with 5 decimal places even if they..
Java web development, what skills do I need? [closed] http://stackoverflow.com/questions/1958808/java-web-development-what-skills-do-i-need seems to be a good web server for Java. It is. It is however limited in capabilities it's a simple servlet container implementing.. on JSF and eventually also in combination with JPA however most of those are still targeted on Java EE 5. Have a look at..
Populating child dropdownlists in JSP/Servlet http://stackoverflow.com/questions/2263996/populating-child-dropdownlists-in-jsp-servlet '' option.value option c forEach select Once caveat is however that this will submit the entire form and cause a flash of content.. option Please select parent option select One caveat is however that this may become unnecessarily lengthy and expensive when..
Avoiding “!= null” statements in Java? http://stackoverflow.com/questions/271526/avoiding-null-statements-in-java you have to check for it. If it's code that you do control however and this is often the case then it's a different story. Avoid..
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 thus not getParameter and so on . The getPart method is however relatively new it's introduced in Servlet 3.0 Glassfish 3 Tomcat..
http://stackoverflow.com/questions/299068/how-slow-are-java-exceptions So try and throw are equally slow and that is pretty slow however if no exception is thrown exiting the try block takes no time..
How can I get the current date and time in UTC or GMT in Java? http://stackoverflow.com/questions/308683/how-can-i-get-the-current-date-and-time-in-utc-or-gmt-in-java isn't the problem please post some sample code. I would however recommend that you use Joda Time anyway which offers a much..
What's wrong with overridable method calls in constructors? http://stackoverflow.com/questions/3404301/whats-wrong-with-overridable-method-calls-in-constructors Telescope X 1999 13 new Telescope X 1999 13 true You can't however currently set only the name and isAdjustable and leaving levels..
http://stackoverflow.com/questions/3655316/browser-cant-access-find-relative-resources-like-css-images-and-links-when-cal URL's will instantly become relative to it. It has however to start with the scheme http https etc . There's no neat way..
http://stackoverflow.com/questions/40480/is-java-pass-by-reference I always thought Java was pass by reference however I've seen a couple of blog posts e.g. this blog that claim it's..
How to internationalize a Java web application? http://stackoverflow.com/questions/4276061/how-to-internationalize-a-java-web-application files which are loaded by ResourceBundle API. This can however be customized so that you can load the key value pairs from.. page will be refreshed with the newly chosen language. You however need to keep in mind that properties files are by default read..
How to parse XML using the SAX parser http://stackoverflow.com/questions/4827344/how-to-parse-xml-using-the-sax-parser handler implementation over the android.sax one. I can however tell you the disadvantage which should be pretty obvious by..
Implementing back/forward buttons in Swing http://stackoverflow.com/questions/5654926/implementing-back-forward-buttons-in-swing The nav bar is constant as a part of the base class however The code of this base class public class Main_Frame extends..
When to use <ui:include>, tag files, composite components and/or custom components? http://stackoverflow.com/questions/6822000/when-to-use-uiinclude-tag-files-composite-components-and-or-custom-componen definied purpose and limitations. Composite components do however have a significant overhead during building restoring of the..
Update JLabel every X seconds from ArrayList<List> - Java http://stackoverflow.com/questions/7943584/update-jlabel-every-x-seconds-from-arraylistlist-java I have a window that get's created with JFrame and JLable however I would like to have the static text be dynamic instead of loading..
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