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{{From|https://help.ubuntu.com/community/EclipseIDE}} {{Languages|UbuntuHelp:EclipseIDE}} Parent page: [[UbuntuHelp:Programming| Programming Applications]] == Introduction == Eclipse is an '''I'''ntegrated '''D'''evelopment '''E'''nvironment or IDE. The Eclipse was originally created by IBM, but the Eclipse Foundation has since taken over direction and development of the project. Eclipse started out as a Java IDE, but has since grown into much more. == Installation == === Ubuntu 9.10 - Karmic Koala === [http://packages.ubuntu.com/karmic/eclipse Eclipse 3.5.1 is available] in Synaptic Package Manager. Note: to install plugins not available in Package Manager, you'll need to install them in user mode. Do '''not''' run eclipse as root to install plugins. === Ubuntu 9.04 - Jaunty Jackalope === You are probably wondering why Ubuntu is packaging a three year old version of this package (3.2 series) rather than the current version (3.4 series) or the imminent release version (3.5 series). The unsatisfying official responses are [https://answers.launchpad.net/ubuntu/+source/eclipse/+question/50160] and [[UbuntuHelp: https://bugs.launchpad.net/ubuntu/+source/eclipse/+bug/123064| https://bugs.launchpad.net/ubuntu/+source/eclipse/+bug/123064]]. The problem is using the chronically not quite there yet gcc version of Java without investing the resources to fully resolve bugs associated with a configuration not supported by upstream contributors. However the Ubuntu Eclipse team does have a set of packages under development which might work for some people. See [https://launchpad.net/~eclipse-team/+archive/ppa]. As of August 2009, the PPA reports failed builds so Eclipse can't be installed from there. Instructions for a [http://johnpaulett.com/2009/06/26/install-eclipse-galileo-3-5-on-ubuntu-jaunty-9-04/ user-install of Eclipse 3.5 in Jaunty] may help. Developers who are capable and persistent enough to help resolve the remaining issues are encouraged to help the [https://launchpad.net/~eclipse-team eclipse-team] create a package for Jaunty. === Ubuntu 8.04 - Hardy Heron === '''Note: If you are facing problem with already installed Eclipse, please have a look at''' [http://blog.adaniels.nl/articles/eclipse-problems-in-ubuntu/] To install Open JDK, first click on '''Applications -> Add/Remove'''. Next, click on '''Internet''' in the leftmost panel. Click on the check-box to the left of '''OpenJDK Java Runtime'''. Then, click on '''Programming''' in the leftmost panel. Click on the check-box to the left of '''Eclipse'''. Finally, click on '''Apply Changes''' in the lower-right corner of the window. Now, to install the JDK, run the following command: <pre><nowiki> sudo apt-get install openjdk-6-jdk </nowiki></pre> Now, click on '''Applications -> Accessories -> Terminal'''; a terminal window should open on the desktop. Now, type the following command in the terminal window: <pre><nowiki> gksudo gedit /etc/eclipse/java_home </nowiki></pre> Now, on a line right before /usr/lib/jvm/java-gcj, type the following: <pre><nowiki> /usr/lib/jvm/java-6-openjdk </nowiki></pre> The file should now look like this: <pre><nowiki> # This file determines the search order the Eclipse Platform uses to find a # compatible JAVA_HOME. This setting may be overridden on a per-user basis by # altering the JAVA_HOME setting in ~/.eclipse/eclipserc. #/usr/lib/jvm/java-7-icedtea /usr/lib/jvm/java-6-openjdk /usr/lib/jvm/java-gcj ... </nowiki></pre> To start Eclipse, click on '''Applications -> Programming -> Eclipse'''. === Ubuntu 7.10 and earlier === Install the <code><nowiki>eclipse</nowiki></code> package from the Universe repository. * For Ubuntu 7.10 (Gutsy Gibbon) and 8.04 (Hardy Heron) the <code><nowiki>eclipse</nowiki></code> package in the repositories is Eclipse 3.2. * If you wish to run later versions of Eclipse, please see the ''User Installation'' section below. See [[UbuntuHelp:InstallingSoftware|InstallingSoftware]] for detailed instructions on using repositories and package managers. == Eclipse and Sun Java == To install the Sun Microsystems JDK, install the <code><nowiki>sun-java6-jdk</nowiki></code> package from the <code><nowiki>multiverse</nowiki></code> repository. By default, the Eclipse which is packaged with Ubuntu runs with the GCJ JVM and not the JVM supplied by Sun Microsystems even if you have installed the Sun Microsystems version. '''Note:''' If you're using Ubuntu 6.06 (Dapper) you'll need to install <code><nowiki>sun-java6-jdk</nowiki></code> from the dapper-backports Multiverse repository. Please take a look at [[UbuntuHelp:UbuntuBackports|UbuntuBackports]] for more information on using backport repositories. In order to load eclipse with the Sun JVM, edit the '''/etc/eclipse/java_home''' file. * Add the path of the Sun JVM above the GCJ JVM entry. <pre><nowiki> /usr/lib/jvm/java-6-sun /usr/lib/jvm/java-gcj [...] </nowiki></pre> * To ensure that the change has happened, open Eclipse and click on ''Help -> About Eclipse SDK -> Configuration details'' and look for this line: <pre><nowiki> [...] -vm /usr/lib/jvm/java-6-sun/bin/java [...] </nowiki></pre> As an added bonus, you may also enjoy a speed gain after doing this. === Sun JVM System Wide === You may also want to use the Sun JVM system-wide. Enabling the Sun JVM is a snap using '''update-java-alternatives'''. * First, find out which versions of Java you have installed through Ubuntu. <pre><nowiki> sudo update-java-alternatives --list output: java-1.5.0-sun 53 /usr/lib/jvm/java-1.5.0-sun java-6-sun 63 /usr/lib/jvm/java-6-sun </nowiki></pre> * Next, specify the one you would like as the default. <pre><nowiki> sudo update-java-alternatives --set java-6-sun </nowiki></pre> '''Note:''' The JVMs listed may differ depending on the version of Ubuntu you're using and the setup of your system. The important thing is to choose the JVM with '''sun''' in the title. === Using Sun Java as the Default JRE for Eclipse Projects === To use the java-6-sun as the default JRE within Eclipse and to have it used in the build path of Java projects, click on ''Window -> Preferences -> Java -> Installed JREs'' and you will see the current JRE's available to Eclipse. To add java-6-sun click the ''Add...'' button. A dialog window will come up with configuration options. First set the JRE home directory by clicking the ''Browse'' button and navigating to <code><nowiki>/usr/lib/jvm/java-6-sun</nowiki></code>. After selecting this location, the rest of the fields should be filled out automatically. Hit OK, and back in the Installed JREs area, place a check box next to java-6-sun to set it as the Eclipse default JRE. * '''Note:''' This is already set in Ubuntu 7.10 (Gutsy) === Java3d === Java3d is now supported for use with Eclipse on Ubuntu, see [[UbuntuHelp:Java3dUbuntu|Java3dUbuntu]]. == Plugins == One of the great features of Eclipse is the wide variety of plugins available for the platform. See [http://www.eclipseplugincentral.com/ Eclipse Plugin Central] for details on individual plugins. One of the simplest ways to install Eclipse plugins is through the Update Manager, accessed in Eclipse by selecting ''Help -> Software Updates -> Find and Install''. === Plugin Installation Example === In this example we'll install the [http://rubyeclipse.sourceforge.net/ RDT (Ruby Development Tools)] plugin. This plugin will give Eclipse support for the [http://www.ruby-lang.org/ Ruby] programming language. To install RDT: <ol><li>Open Eclipse and click on ''Help -> Software Updates -> Find and Install''. This will bring up a dialog allowing you to choose updates to currently installed features or find new features to install. </li><li>Choose ''Search for new features to install -> Next''. </li><li>Click the ''New Remote Site'' button. A dialog opens allowing you to input the location of the plugin you wish to install. </li><li>In the ''Name:'' box, place <code><nowiki>RDT</nowiki></code> (or Ruby if that's more descriptive). </li><li>In ''URL:'' type <code><nowiki>http://updatesite.rubypeople.org/release</nowiki></code>. Then click ''Ok''.</li></ol> * You should now see '''RDT''' in the list of ''Sites to include in search:'' box. <ol><li>Click on ''Finish'' </li><li>A dialog to install RDT should now appear. Click the checkbox next to ''RDT'' in the ''Select features to install:'' area. </li><li>Click ''Next -> Accept the License Agreement -> Next -> Finish'' </li><li>A ''Feature Verification'' dialog will appear click ''Install All''. </li><li>After the plugin installs click ''Yes'' to restart Eclipse.</li></ol> That's all there is to it you can now create Ruby projects and enjoy all the features of the Eclipse IDE. '''Note:''' Most plugins will have a link to the url that you can paste into the udpate manager. === Other Plugin Guides === * [[UbuntuHelp:EclipseWebTools|EclipseWebTools]] - The Web Tools Project provides functionality for web development. * See [[UbuntuHelp:EclipsePDT|EclipsePDT]] for instructions installing the PDT plugin (PHP Development Tools). ''Eclipse 3.3 recommended'' * [[UbuntuHelp:PHPEclipse|PHPEclipse]] is another option as a PHP development environment. This is definitely useful if you're using Eclipse 3.2 and older. * [http://bazaar-vcs.org/BzrEclipse BzrEclipse] is a plugin that enables Bazaar version control system support. * See [[UbuntuHelp:EclipseSubversion|EclipseSubversion]] for instructions installing the Subclipse plugin. === Plugin Troubleshooting === Some plugins do not seem to function properly when running Eclipse normally, such as [http://www.eclipse.org/birt BIRT]. Running Eclipse with the following options may fix the plugin: <pre><nowiki> eclipse -vm $JAVA_HOME/bin/java -ws gtk </nowiki></pre> == User installation == Use this method if you want Eclipse available only for yourself, or if you do not have root access to the computer. It is also useful for those who would like to install newer versions of Eclipse (eg. Eclipse 3.3 or Eclipse 3.4). === Download Eclipse === Open a web browser and go to http://www.eclipse.org/downloads/. There are several different bundles of Eclipse geared toward the different types of software development. You could take a basic Eclipse installation and manually build it into any one of these bundles. They are provided pre-bundled as a convenience for the developer. When in doubt, download the "Eclipse Classic" bundle. It is the most ''traditional'' bundle of Eclipse on the list. Select the Linux 32bit package, or 64bit if you're on an x86_64 system. === Preparing your system === We will set up a few folders for Eclipse in your home directory and unpack the Eclipse package into those folders. Make an opt folder in your home directory: <pre><nowiki> $ mkdir ~/opt </nowiki></pre> Change directory to the folder where your browser downloaded the Eclipse package to. Then unpack Eclipse into the opt folder: <pre><nowiki> $ cd {directory where your browser downloaded the package to} $ tar -xvf eclipse-SDK-3.4.1-linux-gtk.tar.gz && mv eclipse ~/opt </nowiki></pre> Make a bin folder in your home directory, this will be used for the startup script: <pre><nowiki> $ mkdir ~/bin </nowiki></pre> Next create an executable for Eclipe at <code><nowiki>~/bin/eclipse</nowiki></code> with your favorite text editor by typing <code><nowiki>vi ~/bin/eclipse</nowiki></code> or <code><nowiki>nano ~/bin/eclipse</nowiki></code> into the command line. Add the following content: <pre><nowiki> #!/bin/sh export MOZILLA_FIVE_HOME="/usr/lib/mozilla/" export ECLIPSE_HOME="$HOME/opt/eclipse" $ECLIPSE_HOME/eclipse $* </nowiki></pre> Finally, allow the script to be executed: <pre><nowiki> $ chmod +x ~/bin/eclipse </nowiki></pre> HINT: If you are a gtk user and experience problems with the mouse buttons you should try add an export: <pre><nowiki> export GDK_NATIVE_WINDOWS=true </nowiki></pre> to the starter file. You can now execute that file to start up Eclipse. === Gnome icon === * Create a new launcher on the desktop (right click on the desktop -> Create Launcher) or on a panel (right click on a panel -> Add to Panel -> Custom Application Launcher) * Name: <code><nowiki>Eclipse Platform</nowiki></code> * Command: <code><nowiki>/home/<your username>/opt/eclipse/eclipse</nowiki></code> * Icon: <code><nowiki>/home/<your username>/opt/eclipse/icon.xpm</nowiki></code> == General Troubleshooting == Below are some reported errors and the appropriate fixes === No Java Virtual Machine found === If installing Eclipse seems to work, but trying to run it results only in the following error message: <pre><nowiki> A Java Runtime Environment (JRE) or Java Development Kit (JDK) must be available in order to run Eclipse. No Java virtual machine was found after searching the following locations: /usr/lib/j2sdk1.4-sun/bin/java </nowiki></pre> You either have no Java Virtual Machine installed or Eclipse cannot find it. Above on this page it shows that you can check what versions of java are installed by running the following command: <pre><nowiki> sudo update-java-alternatives --list </nowiki></pre> If the output of that is <pre><nowiki> java-6-openjdk 1061 /usr/lib/jvm/java-6-openjdk </nowiki></pre> or something similar, then Eclipse cannot find your JVM. To fix this, you must add the location of your JVM to '''/etc/eclipse/java_home'''. Run this command: <pre><nowiki> gksudo gedit /etc/eclipse/java_home </nowiki></pre> For the following two commands, replace /usr/lib/jvm/java-6-openjdk with whatever was the 3rd output of update-java-alternatives --list. Now, on a line right before /usr/lib/jvm/java-gcj, type the following: <pre><nowiki> /usr/lib/jvm/java-6-openjdk </nowiki></pre> The file should now look like this: <pre><nowiki> # This file determines the search order the Eclipse Platform uses to find a # compatible JAVA_HOME. This setting may be overridden on a per-user basis by # altering the JAVA_HOME setting in ~/.eclipse/eclipserc. #/usr/lib/jvm/java-7-icedtea /usr/lib/jvm/java-6-openjdk /usr/lib/jvm/java-gcj ... </nowiki></pre> If the output of that is just awk errors about missing /usr/lib/jvm/*.jinfo files, it appears there are no Java Virtual Machines installed, and you could install one (and generally fix this error) by running: <pre><nowiki> sudo apt-get install sun-java6-jdk </nowiki></pre> During the installation you must agree to the Sun license. Check and see if Eclipse launches normally now. If it still reports the same error as above after installation of a JVM and running your "... --list" command above now results in output like: java-6-sun 63 /usr/lib/jvm/java-6-sun Make sure that the detected directory (the /usr/lib/jvm/java-6-sun part) appears as the first line without a "#" in front of it in: <pre><nowiki> sudo gedit /etc/eclipse/java_home </nowiki></pre> This should allow Eclipse to find your JVM. === The Eclipse executable launcher was unable to locate its companion startup.jar === If the following error is encountered when running eclipse from the launcher: <pre><nowiki> The Eclipse executable launcher was unable to locate its companion startup.jar file (in the same directory as the executable) </nowiki></pre> Edit <code><nowiki>/usr/bin/eclipse</nowiki></code> with a text editor (e.g <code><nowiki>sudo gedit /usr/bin/eclipse</nowiki></code>) and change the content to the following: <pre><nowiki> #!/bin/sh # Eclipse startup script # JPackage Project <http://www.jpackage.org/> # $Id$ ECLIPSE_OPTS="" VM_OPTS="" # Source system prefs if [ -r /etc/eclipse.conf ] ; then . /etc/eclipse.conf fi # Source user prefs if [ -r $HOME/.eclipserc ] ; then . $HOME/.eclipserc fi # Set data dir if -data wasn't given. if ! echo $@ | grep '\-data ' >/dev/null 2>&1 && [ -n "$USER_DIR" ]; then ECLIPSE_OPTS="$ECLIPSE_OPTS -data $USER_DIR" fi # Find our JVM. # if [ ! -x "$JAVACMD" -a -r /usr/share/java-utils/java-functions ]; then # . /usr/share/java-utils/java-functions # set_javacmd # fi JAVACMD="/usr/lib/j2re1.5-sun/bin/java" # Set JVM if -vm wasn't given. if ! echo $@ | grep '\-vm ' >/dev/null 2>&1 && [ -n "$JAVACMD" ]; then ECLIPSE_OPTS="$ECLIPSE_OPTS -vm $JAVACMD" fi # Set JVM args if -vmargs wasn't given. This needs to be the last option. if ! echo $@ | grep '\-vmargs ' >/dev/null 2>&1 && [ -n "$VM_ARGS" ]; then VM_OPTS="-vmargs $VM_ARGS" fi # if [ -w $USER_DIR/.metadata/.config/platform.cfg ]; then # perl -p -i.bak -e 's|^site\.[0-9]*\.list\.[0-9]*=.*\n||g;' $USER_DIR/.metadata/.config/platform.cfg # fi /opt/eclipse/eclipse $ECLIPSE_OPTS $@ $VM_OPTS </nowiki></pre> *'''Source:''' http://www.karakas-online.de/forum/viewtopic.php?t=2565 === Eclipse keeps running out of memory === Increase stack and heap sizes: <pre><nowiki> eclipse -vmargs -Xms40M -Xmx256M </nowiki></pre> You may also have to increase the space for permanent generation. See the [http://wiki.eclipse.org/FAQ_How_do_I_increase_the_permgen_size_available_to_Eclipse%3F Eclipse FAQ] for more information. == Notes == *This guide has been tested using Ubuntu 6.06 (Dapper), Ubuntu 7.04 (Feisty), Ubuntu 7.10 (Gutsy), and Ubuntu 8.04 (Hardy). *http://www.easyeclipse.org/ could be a useful reference if you're having trouble configuring Eclipse. ---- [[category:CategoryProgramming]] [[category:UbuntuHelp]]
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