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Install Oracle Java 7 in Ubuntu via PPA Repository. We've previously written about installing Oracle JDK 7 in Ubuntu using a script with a GUI provided by Zenity.

Install Oracle Java 7 in Ubuntu via PPA Repository

Some may find this method hard to use and also, it comes with GTK dependencies. So as an alternative that doesn't have any GTK dependencies and comes with automatic updates too, I've set up an Ubuntu PPA for the latest Oracle Java 7 (JDK). The PPA should work not only with Ubuntu but also Linux Mint and other Ubuntu-based Linux distributions. Jersey (JAX-RS) implements a HTTP Basic Auth decoder. I recently play with a pretty nifty framework called Jersey, allowing to make REST application using annotations under Java.

Jersey (JAX-RS) implements a HTTP Basic Auth decoder

This framework (and other JAX-RS implementation) is a pretty well done framework, quite easy to use, and pretty interesting feature inside. I will describe here a HTTP Basic Auth using Jersey system. The HTTP Basic Auth allow to join, on each request, some login/password information to allow/disallow resources, regarding that authentification.

If you follow the REST rules, you already know that REST application are stateless, which means that you must NEVER have a login phase before accessing resources : all login you have to do has to be done within the request (basically we will set a special HTTP header for that). In this case, Basic Auth is a usefull feature from HTTP protocol for doing that. I will describe here the Basic authentification, not the digest one. HTTP Basic Auth, principle Jersey, working with filter. Java web development tutorials. Discover the secrets of the Java Serialization API. Oracle Oracle Oracle Technology Network > Java JavaOne JavaOne Sessions Available JavaOne sessions are now available for replay.

Discover the secrets of the Java Serialization API

Useful code samples. Untitled. By Matthew Ford, 1st January 2005 (revised 13th August 2009 to remove dead links)©2005-2009 Forward Computing and Control Pty.

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Ltd. NSW AustraliaAll rights reserved. Abstract Introduction One of Java's claims to fame is that it was conceived from the start as a language that would support multi-threaded programming. The problems with stopping Threads were not the only problems the previous versions of Java had. Public void run() { // note the Thread.run() method is declared // NOT to throw any checked exceptions try { .... // some code here which might throw // a checked exception such as an IOException .. } catch (IOException ioex) { ioex.printStackTrace(); } } because it was not easy to let the rest of the program know that the thread had terminated with an exception.

An Overview of RMI Applications (The Java™ Tutorials > RMI) RMI applications often comprise two separate programs, a server and a client.

An Overview of RMI Applications (The Java™ Tutorials > RMI)

A typical server program creates some remote objects, makes references to these objects accessible, and waits for clients to invoke methods on these objects. A typical client program obtains a remote reference to one or more remote objects on a server and then invokes methods on them. RMI provides the mechanism by which the server and the client communicate and pass information back and forth. Such an application is sometimes referred to as a distributed object application. Distributed object applications need to do the following: Locate remote objects. The following illustration depicts an RMI distributed application that uses the RMI registry to obtain a reference to a remote object. Advantages of Dynamic Code Loading One of the central and unique features of RMI is its ability to download the definition of an object's class if the class is not defined in the receiver's Java virtual machine.

Compiling Sources. 64 Java questions for any job interview. 1.

64 Java questions for any job interview

Which of the following are valid definitions of an application’s main( ) method? A) public static void main();b) public static void main( String args );c) public static void main( String args[] );d) public static void main( Graphics g );e) public static boolean main( String args[] ); 2. If MyProg.java were compiled as an application and then run from the command line as: Producer consumer in Java 2 : Producer Consumer « Threads  /* * Copyright (c) Ian F. Darwin, 1996-2002. * All rights reserved. Software written by Ian F. Darwin and others. * $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $ * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED.

Jastor. Java - Le Keyword di Java (1/2) Meet Qt Jambi. By Gunnar Sletta In addition, Qt Jambi provides the Java User Interface Compiler (JUIC), its own tailored version of Qt's user interface compiler. JUIC makes it possible for Java developers to take the advantage of Qt Designer , Trolltech's tool for designing and building graphical user interfaces from Qt components, by converting Qt Designer 's user interface definition files to Java source files. In this article we will take a closer look at Qt Jambi to see how the Qt framework is integrated with Java.

We will do this by writing a small example application. The application is a game called , inspired by the arcade classic of a similar name, where the player scores points by using a paddle to bounce a ball against a brick wall in an attempt to demolish it brick by brick. The current Qt Jambi release is the third technology preview.

The display is implemented by subclassing the QGraphicsView class. Let's look at the user interface again. Juic -cp . Qt Jambi. Building » Qt Jambi. Design with runtime class information. One of the cool things about Java's object model is that Java objects are "conscious": given a reference to an object, you can get information about that object's class.

Design with runtime class information

This "runtime class information" makes possible all kinds of interesting designs and implementation techniques. But how are we to use this capability? When I think about Java's support for runtime class information, two clichés come to my mind: 1. Information is power. In our case, runtime class information gives power to the programmer because he or she has more information to work with. 2. Alas, in our case, runtime class information can be abused in designs. Cobra: Java HTML Parser & Viewer (Open Source) Cobra: Getting Started This page provides an overview of the Cobra API and tips for getting started.

Cobra: Java HTML Parser & Viewer (Open Source)

Test Program. Java Tip 70: Create objects from jar files! In Java Tip 49, (coauthored with Arthur Choi) we learned how to extract Java resources from jar (Java Archive) and zip archives, and in Jack Harich's Java Tip 39, we learned how to create custom class loaders to load class files via the local filesystem or the network.

Java Tip 70: Create objects from jar files!

In this new Java Tip, we're going to put that knowledge to work, loading classes from jar files. Look Ma, no hands! Twitter4J.