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java Programming Glossary: whereWhat is the difference between JSF, Servlet and JSP? http://stackoverflow.com/questions/2095397/what-is-the-difference-between-jsf-servlet-and-jsp variables and multithreading What is a Javabean and where are they used How to avoid Java code in JSP files share improve..
What is a Null Pointer Exception? http://stackoverflow.com/questions/218384/what-is-a-null-pointer-exception a pointer to an object. Consider the following code where you declare a variable of primitive type int int x x 10 In this..
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 0 activePageKB 0 The top section is the main one where size is the total size in address space of a particular heap.. straight forward address space and RAM usage of a process where if you add up the RAM usage across processes you get an ridiculously..
How to upload files to server using JSP/Servlet? http://stackoverflow.com/questions/2422468/how-to-upload-files-to-server-using-jsp-servlet List items upload.parseRequest request This line is where it died. Unfortunately the servlet threw an exception without.. or copypaste some homegrown library less code found elsewhere on the Internet. Many online sources have failed hard in this.. Note that Glassfish versions older than 3.1.2 had a bug wherein the getParameter still returns null . If you are targeting..
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 Java generics are non reified there are two exceptions where raw types must be used in new code Class literals e.g. List.class..
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 web forms do is of type application x www form urlencoded wherein the query string is written to the request body. URLConnection.. The URLConnection will by default set it to Java 1.6.0_19 where the last part is obviously the JRE version. You can override..
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 and why is it important Please show an example where missing serialVersionUID will cause a problem. java eclipse.. serialVersionUID declarations use the private modifier where possible since such declarations apply only to the immediately..
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 This is how the whole code would look like... The activity where you are showing the dialog... public class MainActivity extends..
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 is the character encoding. There are some special cases where the platform default is what you want but they are rare and..
JSTL in JSF2 Facelets… makes sense? http://stackoverflow.com/questions/3342984/jstl-in-jsf2-facelets-makes-sense fails in tag handlers To see some real world examples where JSTL tags are helpful i.e. when really properly used during..
Why not use Double or Float to represent currency? http://stackoverflow.com/questions/3730019/why-not-use-double-or-float-to-represent-currency
How do I import the javax.servlet API in my Eclipse project? http://stackoverflow.com/questions/4076601/how-do-i-import-the-javax-servlet-api-in-my-eclipse-project to a servletcontainer of a different make version than where those libraries are originally obtained from. Here are some..
http://stackoverflow.com/questions/4112686/how-to-use-servlets-and-ajax the last example which displays List Product in a table where the Product class has the properties Long id String name and..
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 which will become difficult to maintain In a situation where I need to define proportions between children of a Component.. which will become difficult to maintain In a situation where I need to define proportions between children of a Component..
The Use of Multiple JFrames, Good/Bad Practice? http://stackoverflow.com/questions/9554636/the-use-of-multiple-jframes-good-bad-practice as the parent for the dialogs. Many images In this case where the multiple elements are images it would be better to use either..
http://stackoverflow.com/questions/9864267/load-icon-image-exception .getResource resources icon.gif More info on as to where lies the difference between the two approaches can be found..
jersey rest web Service with Activemq middleware integration http://stackoverflow.com/questions/19706788/jersey-rest-web-service-with-activemq-middleware-integration request to the respective resource. Now How to do here. Where to put the HTTP request. I need to handle each request asynchronously...
Where to place configuration properties files in a JSP/Servlet web application? http://stackoverflow.com/questions/2161054/where-to-place-configuration-properties-files-in-a-jsp-servlet-web-application to place configuration properties files in a JSP Servlet web..
Is there a goto statement in java? http://stackoverflow.com/questions/2545103/is-there-a-goto-statement-in-java Java. But I found that it is one of the keyword in Java. Where can it be used If it can not be used then why was it included..
custom listview adapter getView method being called multiple times, and in no coherent order http://stackoverflow.com/questions/2618272/custom-listview-adapter-getview-method-being-called-multiple-times-and-in-no-co is a mess Why is getview called for each row three times Where are these convertViews coming from when I haven't scrolled yet..
http://stackoverflow.com/questions/26305/how-can-i-play-sound-in-java Java I want to be able to play sound files in my program. Where should I look java audio share improve this question I personally..
Avoiding “!= null” statements in Java? http://stackoverflow.com/questions/271526/avoiding-null-statements-in-java way there are two instances where null checking comes up Where null is a valid response in terms of the contract and Where.. null is a valid response in terms of the contract and Where it isn't a valid response. 2 is easy. Either use assert statements..
http://stackoverflow.com/questions/2750216/post-increment-operator-java the same logic shouldn't j j be evaluated as j j j j 1 Where does the temp come into picture here Any explanations would..
How to avoid Java Code in JSP-Files? http://stackoverflow.com/questions/3177733/how-to-avoid-java-code-in-jsp-files use JSTL are in general easier to read and maintain. ... Where possible avoid JSP scriptlets whenever tag libraries provide.. of scriptlets with various opening and closing braces Where the heck does this closing brace belong to . An easy aid is..
Where do Java and .NET string literals reside? http://stackoverflow.com/questions/372547/where-do-java-and-net-string-literals-reside do Java and .NET string literals reside A recent question about..
Find Java classes implementing an interface [duplicate] http://stackoverflow.com/questions/435890/find-java-classes-implementing-an-interface but now I do and I can't seem to find the functions again. Where can these functions be found Edit I'm not looking for any IDE..
http://stackoverflow.com/questions/469695/decode-base64-data-in-java byte decodedBytes decoder.decodeBuffer encodedBytes Where encodedBytes is either a java.lang.String or a java.io.InputStream..
Virtual Memory Usage from Java under Linux, too much memory used http://stackoverflow.com/questions/561245/virtual-memory-usage-from-java-under-linux-too-much-memory-used it needs so the virtual memory size is largely irrelevant. Where virtual memory size is important is if you're running on a 32..
Where do I find a standard Trie based map implementation in Java? http://stackoverflow.com/questions/623892/where-do-i-find-a-standard-trie-based-map-implementation-in-java do I find a standard Trie based map implementation in Java ..
How a AST for an object oriented programming language would look like? http://stackoverflow.com/questions/6376662/how-a-ast-for-an-object-oriented-programming-language-would-look-like needed or could be as Person String name int age Where can I see a real representation of an actual programming language..
Where can I find a Java decompiler? [duplicate] http://stackoverflow.com/questions/671394/where-can-i-find-a-java-decompiler can I find a Java decompiler duplicate Does anyone know of..
http://stackoverflow.com/questions/7295096/what-exactly-is-java-ee tutorial the best way to learn how to make Java web apps Where can i find a list of all the reference implementations for JEE6..
Is there a way to refer to the current type with a type variable? http://stackoverflow.com/questions/7354740/is-there-a-way-to-refer-to-the-current-type-with-a-type-variable self return getSomeOtherInstanceFromWhoKnowsWhere This example exposes two holes in the pattern EvilLeafClass.. now .isNull DBPaths.from_Foo .endAt_ExpiredDate .endOr .endWhere .havingEvery .equals DBPaths.from_Foo .to_FooChild .endAt_FooChildId.. classes. The same pattern was used for the helpers like Where Having Or etc. all of which needed to share significant code...
http://stackoverflow.com/questions/9010734/why-do-i-need-to-nest-a-component-with-rendered-some-in-another-component-w this sort public void find searchResults setResults true Where searchResults is an ArrayList. After a search it is not null..
JasperReports: Passing parameters to query http://stackoverflow.com/questions/11871042/jasperreports-passing-parameters-to-query of my database like SELECT name phone email FROM company WHERE P clause P key ORDER BY P order Because WHERE clause and ORDER.. FROM company WHERE P clause P key ORDER BY P order Because WHERE clause and ORDER BY clause are dynamic for the user to select... P and P . P paramName syntax is using mostly for setting WHERE input parameters values. The replacement algorithm is smart..
How to turn off the Eclipse code formatter for certain sections of Java code? http://stackoverflow.com/questions/1820908/how-to-turn-off-the-eclipse-code-formatter-for-certain-sections-of-java-code of something like String query SELECT FOO BAR BAZ FROM ABC WHERE BAR 4 I have something like String query SELECT FOO BAR BAZ.. something like String query SELECT FOO BAR BAZ FROM ABC WHERE BAR 4 This style makes the SQL much easier to read and maintain.. FORMATTING String query SELECT FOO BAR BAZ FROM ABC WHERE BAR 4 START ECLIPSE FORMATTING Obviously one solution is to..
http://stackoverflow.com/questions/1986998/resultset-to-pagination FROM SELECT id username job place FROM contact ORDER BY id WHERE ROWNUM BETWEEN d AND d public List Contact list int firstrow.. BY id AS row id username job place FROM contact AS temp WHERE row BETWEEN d AND d public List Contact list int firstrow int..
How to retrieve and display images from a database in a JSP page? http://stackoverflow.com/questions/2340406/how-to-retrieve-and-display-images-from-a-database-in-a-jsp-page SELECT content contentType contentLength FROM Image WHERE name protected void doGet HttpServletRequest request HttpServletResponse..
Handling MySQL datetimes and timestamps in Java http://stackoverflow.com/questions/3323618/handling-mysql-datetimes-and-timestamps-in-java connection.prepareStatement SELECT FROM tbl WHERE ts preparedStatement.setTimestamp 1 timestamp The normal practice..
Android - SQlite Getting nearest locations (with latitude and longitude) http://stackoverflow.com/questions/3695224/android-sqlite-getting-nearest-locations-with-latitude-and-longitude calculateDerivedPosition center mult radius 270 strWhere WHERE COL_X String.valueOf p3.x AND COL_X String.valueOf p1.x AND..
CSRF, XSS and SQL Injection attack prevention in JSF http://stackoverflow.com/questions/7722159/csrf-xss-and-sql-injection-attack-prevention-in-jsf input into SQL strings like so String sql SELECT FROM user WHERE username ' username ' AND password md5 password String jpql.. AND password md5 password String jpql SELECT u FROM User u WHERE u.username ' username ' AND u.password md5 ' password ' Imagine.. queries where applicable. String sql SELECT FROM user WHERE username AND password md5 String jpql SELECT u FROM User u WHERE..
Is it safe to use a static java.sql.Connection instance in a multithreaded system? http://stackoverflow.com/questions/9428573/is-it-safe-to-use-a-static-java-sql-connection-instance-in-a-multithreaded-syste SELECT id username email FROM user WHERE username AND password md5 statement.setString 1 username statement.setString..
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