PUBLIC MARKS with tag openjdk

Overview Sun Microsystems have developed Java, which is many things depending on who you ask. It is a language, and an execution environment and probably many more things. On this page Java refers to the software that executes programs compiled to Java byte codes (akin to machine language). Be aware of the Java trap. Although keep in mind that with the GPL licensing of the Sun Java implementation the Java trap is a thing of the past. Even RMS thinks so. Use IcedTea on Ubuntu 7.10 and OpenJDK on Ubuntu 8.04 or later. The first free project to offer substantial parts of Java platform functionality was Guavac. After that the free software movement developed java compilers, most notably the GNU Compiler for Java. GCJ is a front end to the GCC compiler which can natively compile both Java(tm) source and bytecode files. The compiler can also generate class files. Gcjwebplugin is a little web browser plugin to execute Java applets. It is targeted for Mozilla and compatible browsers that support the NPAPI. Others include the Eclipse Java Compiler, which is maintained by the Eclipse Foundation. Eclipse is an open-source Integrated development environment (IDE) written primarily in Java. The Eclipse open source community has over 60 open source projects. OpenJDK is the open source Java, derived from sources which will become OpenJDK 7 in the future.

How to download and install prebuilt OpenJDK packages Ubuntu logo On Ubuntu 8.04 (Hardy Heron), do one of the following: * On the Gnome desktop (Ubuntu): o In the main desktop menu, choose "Add/Remove ..." o In the "Show" toggle box, select "All Open Source Applications" o Search for "OpenJDK" o Select the "OpenJDK Java Runtime" (openjdk-6-jre) o Confirm the installation of community maintained software o Press the "Apply Changes" button * On the KDE desktop (Kubuntu): o In the main desktop menu, choose "Add/Remove Programs" o In the "Adept Installer" search for "OpenJDK" o Select the "OpenJDK Java Runtime" (openjdk-6-jre) o Press the "Apply Changes" button * On the command line, type: $ sudo apt-get install openjdk-6-jre The openjdk-6-jre package contains just the Java Runtime Environment. If you want to develop Java programs then install the openjdk-6-jdk package. For more information on how to install Java on Ubuntu, including on versions prior to 8.04, please see the Ubuntu Java Community page.

Welcome to the Open-Source JDK Community! This is the place to collaborate on the open-source JDK, an implementation of the Java Platform, Standard Edition specification defined in the Java Community Process.

This project is the place to collaborate on the open-source JDK, an implementation of the Java Platform, Standard Edition specification defined in the Java Community Process. What you will find here Today this project contains two significant components of the JDK: * The HotSpot Virtual Machine * The Java programming-language compiler (javac), with complete NetBeans project metadata The remainder of the open-source JDK will be available in the first half of 2007. At that time this project will host the source code for the complete JDK except for a few components that Sun does not have the right to publish in source form under the GPL; pre-built binaries will be provided for those components. You will also find the jtreg unit-test harness here, for use in running the compiler's unit tests. For now this tool is available only in binary form, but eventually it too will be open-sourced. How to participate You can participate in many ways; here are some of the possibilities: * Get the latest community news from the OpenJDK Community page * Check out the latest blogs on Planet JDK * Join the discussion on one or more of the OpenJDK mailing lists * Join the live conversation via IRC on irc.oftc.net #openjdk * Elaborate and collaborate on ideas on the OpenJDKWiki * Build and hack on the compiler with NetBeans * Contribute a patch to fix a bug or enhance the compiler or the HotSpot VM