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java Programming Glossary: exampleWhy JSF calls getters multiple times http://stackoverflow.com/questions/2090033/why-jsf-calls-getters-multiple-times at all as it may return different values on each call for example when it's dependent on the currently iterated datatable row..
How to upload files to server using JSP/Servlet? http://stackoverflow.com/questions/2422468/how-to-upload-files-to-server-using-jsp-servlet likely because you forgot the commons IO. Here's a kickoff example how the doPost of your UploadServlet may look like when using.. uploaded file by request.getAttribute . You can find an example in this blog article . When you're already on Servlet 3.0 or.. the request.getParameter the usual way. You can find an example in this article . Workaround for GlassFish bug of getParameter..
Overriding equals and hashCode in Java http://stackoverflow.com/questions/27581/overriding-equals-and-hashcode-in-java HashCodeBuilder from the Apache Commons Lang library. An example public class Person private String name private int age .....
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 beforehand the posted code snippets are all basic examples. You'll need to handle trivial IOException s and RuntimeException.. and depend on the functional requirements. String url http example.com String charset UTF 8 String param1 value1 String param2.. using URLConnection#getInputStream and so on. The above examples does exactly that so the connect call is in fact superfluous...
GUI not working after rewriting to MVC http://stackoverflow.com/questions/3066590/gui-not-working-after-rewriting-to-mvc Overview . Based on this outline the following example shows an MVC implementation of a much simpler game that illustrates.. the same concepts. Addendum I've modified the original example to show how MVC allows one to enhance the View without changing.. View of changes. Several approaches are widely used In the example below Model extends Observable for simplicity. A more common..
How do servlets work? Instantiation, session variables and multithreading http://stackoverflow.com/questions/3106452/how-do-servlets-work-instantiation-session-variables-and-multithreading requests in other sessions. That's threadunsafe The below example illustrates that public class MyServlet extends HttpServlet..
How to avoid Java Code in JSP-Files? http://stackoverflow.com/questions/3177733/how-to-avoid-java-code-in-jsp-files whenever the DB access throws an exception. In the above example the default error 500 page will be displayed which you can anyway.. validation errors in case of an error in this particular example you can redisplay it using message in EL or just taking to the.. you can also easily create functions yourself . Here's an example how JSTL fn escapeXml is useful to prevent XSS attacks . @ taglib..
JSTL in JSF2 Facelets… makes sense? http://stackoverflow.com/questions/3342984/jstl-in-jsf2-facelets-makes-sense may lead to unexpected results when using JSTL tags in for example JSF iterating components like h dataTable ui repeat etc or when.. @ViewScoped fails in tag handlers To see some real world examples where JSTL tags are helpful i.e. when really properly used..
http://stackoverflow.com/questions/40480/is-java-pass-by-reference new Dog Max foo aDog aDog.getName .equals Max true In this example aDog.getName will still return Max . d is not overwritten in..
http://stackoverflow.com/questions/4112686/how-to-use-servlets-and-ajax . Since jQuery is the most popular here's a basic kickoff example based on jQuery. JSP DOCTYPE html html lang en head title SO.. servlet name someservlet servlet name servlet class com.example.SomeServlet servlet class servlet servlet mapping servlet name.. in WEB INF lib folder of your webapplication. Here's an example which displays List String as ul li . The servlet @Override..
How do I write a correct micro-benchmark in Java? http://stackoverflow.com/questions/504103/how-do-i-write-a-correct-micro-benchmark-in-java with an at sign to denote the non initial entry point for example Trouble 1 run @ 2 41 bytes . Prefer server to client and regular..
http://stackoverflow.com/questions/5621338/how-to-add-jtable-in-jpanel import javax.swing.border.TitledBorder A short example of a nested layout that can change PLAF at runtime. The TitledBorder..
How to use an existing database with an Android application [duplicate] http://stackoverflow.com/questions/9109438/how-to-use-an-existing-database-with-an-android-application have a copy of the database in the assets folder so for example if your database name is ordersDB then the value of DB_NAME..
The Use of Multiple JFrames, Good/Bad Practice? http://stackoverflow.com/questions/9554636/the-use-of-multiple-jframes-good-bad-practice to the parent doing so. As items in a JList simple example below . As nodes in a JTree . Nested layouts . But if those..
JComponents not showing up with picture background? http://stackoverflow.com/questions/11369171/jcomponents-not-showing-up-with-picture-background import javax.swing. public class PaintingExample private CustomPanel contentPane private void displayGUI JFrame.. private void displayGUI JFrame frame new JFrame Painting Example frame.setDefaultCloseOperation JFrame.DISPOSE_ON_CLOSE contentPane.. new Runnable public void run new PaintingExample .displayGUI class CustomPanel extends JPanel private BufferedImage..
Providing white space in a Swing GUI http://stackoverflow.com/questions/17874717/providing-white-space-in-a-swing-gui 5. CardLayout example CardLayout int hGap int vGap Example to display all constructors in action import java.awt. import.. java.awt.event. import javax.swing. public class LayoutExample private final int hGap 5 private final int vGap 5 private String.. JPanel gridBagPanel private JPanel cardPanel public LayoutExample buttons new JButton 16 gbc new GridBagConstraints gbc.anchor..
Evaluating a math expression given in string form http://stackoverflow.com/questions/3422673/evaluating-a-math-expression-given-in-string-form routine to evaluate simple math expressions from String s. Example strings 5 3 or 10 40 or 10 3 I want to avoid a lot of if then..
What is a stack trace, and how can I use it to debug my application errors? http://stackoverflow.com/questions/3988788/what-is-a-stack-trace-and-how-can-i-use-it-to-debug-my-application-errors was in the middle of when an Exception was thrown. Simple Example With the example given in the question we can determine exactly.. that something probably title is null in the above code. Example with a chain of exceptions Sometimes applications will catch..
How to parse XML using the SAX parser http://stackoverflow.com/questions/4827344/how-to-parse-xml-using-the-sax-parser title public String getTitle return title same as above. Example public class Example extends DefaultHandler private Channel.. getTitle return title same as above. Example public class Example extends DefaultHandler private Channel channel private Items.. channel private Items items private Item item public Example items new Items public Channel parse InputStream is RootElement..
How do I write a correct micro-benchmark in Java? http://stackoverflow.com/questions/504103/how-do-i-write-a-correct-micro-benchmark-in-java and comments illustrating various things to think about. Example Should the benchmark measure time iteration or iterations time..
http://stackoverflow.com/questions/5621338/how-to-add-jtable-in-jpanel manager share improve this question Nested Layout Example The Java Tutorial has comprehensive information on using layout.. added using the button. Nimbus PLAF NestedLayoutExample.java import java.awt. import java.awt.image.BufferedImage import.. Andrew Thompson @version 2011 04 12 class NestedLayoutExample public static void main String args Runnable r new Runnable..
HTTP URL Address Encoding in Java http://stackoverflow.com/questions/724043/http-url-address-encoding-in-java I am not able to encode the HTTP URL address properly... Example URL http search.barnesandnoble.com booksearch first book.pdf..
How do I get the CellRow when there is an ItemEvent in the JComboBox within the cell http://stackoverflow.com/questions/7350445/how-do-i-get-the-cellrow-when-there-is-an-itemevent-in-the-jcombobox-within-the import javax.swing.table.TableColumn public class Example extends JFrame private static final long serialVersionUID 1L.. 3 public static void main String args throws IOException Example example new Example public Example Create Table Model DefaultTableModel.. main String args throws IOException Example example new Example public Example Create Table Model DefaultTableModel model new..
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