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[[Category:Development]]
 
[[Category:Development]]
 
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[[ru:Eclipse]]
 
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[[zh-CN:Eclipse]]
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[[zh-hans:Eclipse]]
[http://eclipse.org Eclipse] is an open source community project, which aims to provide a universal development platform. The Eclipse project is most widely known for its cross-platform integrated development environment (IDE). The Arch Linux packages (and this guide) relate specifically to the IDE.
+
[https://eclipse.org Eclipse] is an open source community project, which aims to provide a universal development platform. The Eclipse project is most widely known for its cross-platform integrated development environment (IDE). The Arch Linux packages (and this guide) relate specifically to the IDE.
  
The Eclipse IDE is largely written in Java but can be used to develop applications in a number of languages, including [[Java]], C/C++, PHP, Perl and Python. The IDE can also provide subversion support (see below) and task management (either through its built-in TODO list or through the eclipse-mylyn package).
+
The Eclipse IDE is largely written in Java but can be used to develop applications in a number of languages, including Java, C/C++, PHP, Perl and Python. The IDE can also provide subversion support and task management.
  
 
== Installation ==
 
== Installation ==
  
It is very easy to install the Eclipse SDK in Arch Linux, just [[Pacman|install]] the {{Pkg|eclipse}} package from the [[official repositories]].
+
[[Install]] one of the following packages:
  
This base package has [[Java]] development support built in.
+
* {{Pkg|eclipse-cpp}}
 +
* {{Pkg|eclipse-java}}
 +
* {{Pkg|eclipse-php}}
 +
* {{Pkg|eclipse-jee}}
 +
 
 +
You cannot install multiple of these at the same time since they conflict, see {{Bug|45577}}: choose the package above which most immediately fulfills your needs, and then add support for any additionally required languages through [[#Plugins]].
  
 
== Plugins ==
 
== Plugins ==
There are two methods to install plugins for Eclipse:
 
*using [[pacman]] to install plugins packaged in Arch repositories (see [[Eclipse plugin package guidelines]] for further informations);
 
*using Eclipse's plugin manager to download and install plugins from their original repositories; in this case you have to find the needed repository in the plugin's website, then go to ''Help -> Install New Software...'', enter the repository in the ''Work with'' field, select the plugin to install from the list below and follow the instructions. Make sure that you first add the default update site for your installed version of Eclipse so that plugin dependencies can automatically be installed. The most current version of Eclipse is Juno and the default update site for Juno is: http://download.eclipse.org/releases/juno
 
  
{{Warning|
+
Many plugins are easily installed using '''pacman''' (see [[Eclipse plugin package guidelines]] for further informations). This will also keep them up-to-date. Alternatively, you can choose either the [[#Eclipse Marketplace|Eclipse Marketplace]] or the internal [[#Plugin manager|plugin manager]].
*If you install plugins with Eclipse's plugin manager, you are advised to launch Eclipse as root: this way the plugins will be installed in {{ic|/usr/share/eclipse/plugins/}}; if you installed them as normal user, they would be stored in a version-dependent folder inside {{ic|~/.eclipse/}}, and, after upgrading Eclipse, they wouldn't be recognized any longer.
 
*Do not use Eclipse as root for your everyday work.}}
 
  
=== C/C++ support ===
+
=== Add the default update site ===
  
==== Eclipse CDT ====
+
Make sure that you check that the default update site for your version of Eclipse is configured so that plugin dependencies can automatically be installed. The most current version of Eclipse is Oxygen and the default update site for it is: http://download.eclipse.org/releases/oxygen. Go to Help > Install new Software > Add, fill the name to easily identify the update site later - for instance, Mars Software Repository - and fill the location with the url.
*Project homepage: http://www.eclipse.org/cdt/
 
*Package in [extra]: {{Pkg|eclipse-cdt}}
 
  
=== Perl support ===
+
=== Eclipse Marketplace ===
  
====EPIC====
+
{{Note|make sure you have followed the [[#Add the default update site|Add the default update site]] section.}}
*Project homepage: http://www.epic-ide.org/
+
To use the Eclipse Marketplace, install it first: go to Help > Install new software > Switch to the default update site > General Purpose Tools > Marketplace Client. Restart Eclipse and it will be available in Help > Eclipse Marketplace.
*Package in [[AUR]]: {{AUR|eclipse-epic}}
 
  
=== [[PHP]] support ===
+
=== Plugin manager ===
  
==== Eclipse PDT ====
+
{{Note|make sure you have followed the [[#Add the default update site|Add the default update site]] section.}}
*Project homepage: http://www.eclipse.org/pdt/
+
Use Eclipse's plugin manager to download and install plugins from their original repositories: in this case you have to find the needed repository in the plugin's website, then go to ''Help > Install New Software...'', enter the repository in the ''Work with'' field, select the plugin to install from the list below and follow the instructions.
*Instructions for the Eclipse plugin version: http://wiki.eclipse.org/PDT/Installation
 
*Package in [[AUR]]: {{AUR|eclipse-pdt}}
 
  
==== PHPEclipse ====
+
{{Note|
*Project homepage: http://www.phpeclipse.com/
+
* If you install plugins with Eclipse's plugin manager, you are advised to launch Eclipse as root: this way the plugins will be installed in {{ic|/usr/lib/eclipse/plugins/}}; if you installed them as normal user, they would be stored in a version-dependent folder inside {{ic|~/.eclipse/}}, and, after upgrading Eclipse, they would not be recognized any longer.
*Package in [[AUR]]: {{AUR|eclipse-phpeclipse}}
+
* Do not use Eclipse as root for your everyday work.
 +
}}
  
==== Aptana PHP ====
+
==== Updates via plugin manager ====
See Aptana Studio further down.
 
  
=== [[Python]] support ===
+
Run Eclipse and select ''Help > Check for Updates''. If you have installed them as root as advised in the section above, you have to run Eclipse as root.
  
==== PyDev ====
+
For plugins to be updated, you should check to have their update repositories enabled in ''Window > Preferences > Install/Update > Available Software Sites'': you can find each plugin's repository(es) on the respective project website. To add, edit, remove... repositories just use the buttons on the right of the ''Available Software Sites'' panel. For Eclipse 4.5 (Mars), check you have enabled this repository:
*Project homepage: http://pydev.org/
 
*Package in [[AUR]]: {{AUR|eclipse-pydev}}
 
  
=== Web development (HTML, CSS, JavaScript...) ===
+
http://download.eclipse.org/releases/mars
  
==== Aptana Studio ====
+
To receive update notifications, go to ''Window > Preferences > Install/Update > Automatic Updates''. If you want to receive notifications for plugins installed as root, you should run Eclipse as root, go to ''Window > Preferences > Install/Update > Available Software Sites'', select the repositories related to the installed plugins and ''Export'' them, then run Eclipse as normal user and ''Import'' them in the same panel.
*Project homepage: http://www.aptana.org/
 
*For the Eclipse plugin version, use Eclipse's plugin manager
 
*For the standalone version, there is a package in [[AUR]]: {{AUR|aptana-studio}}
 
  
=== [[Subversion]] support ===
+
=== List of plugins ===
  
==== Subclipse ====
+
* {{App|AVR|AVR microcontroller plugin.|http://avr-eclipse.sourceforge.net/wiki/index.php/The_AVR_Eclipse_Plugin|{{AUR|eclipse-avr}}}}
*Project homepage: http://subclipse.tigris.org/
+
* {{App|Aptana|HTML5/CSS3/JavaScript/Ruby/Rails/PHP/Pydev/Django support. Also available as standalone application.|http://www.aptana.com/|{{AUR|aptana-studio}}}}
*Package in [[AUR]]: {{AUR|eclipse-subclipse}}
+
* {{App|IvyDE|IvyDE dependency Manager.|https://ant.apache.org/ivy/ivyde/|{{AUR|eclipse-ivyde}}}}
*[http://www-128.ibm.com/developerworks/opensource/library/os-ecl-subversion/ How to use Subversion with Eclipse]
+
* {{App|Markdown|Markdown editor plugin for Eclipse.|http://www.winterwell.com/software/markdown-editor.php|{{AUR|eclipse-markdown}}}}
 +
* {{App|PyDev|[[Python]] support.|http://pydev.org/|{{AUR|eclipse-pydev}}}}
 +
* {{App|Subclipse|[[Subversion]] support.|https://github.com/subclipse/subclipse|{{AUR|eclipse-subclipse}}}}
 +
* {{App|Subversive|Alternative Subversion support.|https://www.eclipse.org/subversive/|{{AUR|eclipse-subversive}}}}
 +
* {{App|TestNG|TestNG support.|http://testng.org/doc/eclipse.html|{{AUR|eclipse-testng}}}}
 +
* {{App|TeXlipse|[[LaTeX]] support.|http://texlipse.sourceforge.net/|{{AUR|eclipse-texlipse}}}}
 +
* {{App|Checkstyle|Eclipse Checkstyle support.|http://eclipse-cs.sourceforge.net/|{{AUR|eclipse-checkstyle}}}}
  
==== Eclipse Subversive ====
+
== Enable javadoc integration ==
*Project homepage: http://www.eclipse.org/subversive/
 
*Package in [[AUR]]: {{AUR|eclipse-subversive}}
 
 
 
=== [[Git]] support ===
 
 
 
==== EGit ====
 
*Project homepage: http://www.eclipse.org/egit
 
*Eclipse Update Link: http://download.eclipse.org/egit/updates
 
*Package in [[AUR]]: {{AUR|eclipse-egit}}
 
 
 
=== [[Mercurial]] support ===
 
 
 
==== MercurialEclipse ====
 
*Project homepage: http://code.google.com/a/eclipselabs.org/p/mercurialeclipse/
 
*Eclipse Update Link: http://mercurialeclipse.eclipselabs.org.codespot.com/hg.wiki/update_site/stable
 
*Package in [[AUR]]: {{AUR|eclipse-mercurial}}
 
 
 
===[[LaTeX]] support ===
 
 
 
==== TeXlipse ====
 
*Project homepage: http://texlipse.sourceforge.net/
 
*Eclipse Update Link: http://texlipse.sourceforge.net
 
 
 
==Updates==
 
*Eclipse and the plugins installed with pacman are obviously updated with pacman itself.
 
*For plugins installed with Eclipse's plugin manager, run Eclipse and select ''Help -> Check for Updates'' (if you have installed them as root as advised in the section above, you have to run Eclipse as root).
 
 
 
For plugins to be updated, you should check to have their update repositories enabled in ''Window -> Preferences -> Install/Update -> Available Software Sites'': you can find each plugin's repository(es) on the respective project website. To add, edit, remove... repositories just use the buttons on the right of the ''Available Software Sites'' panel. For Eclipse 4.2 (Juno), check you have enabled this repository:
 
 
 
http://download.eclipse.org/releases/juno
 
 
 
To receive update notifications, go to ''Window -> Preferences -> Install/Update -> Automatic Updates''. If you want to receive notifications for plugins installed as root, you should run Eclipse as root, go to ''Window -> Preferences -> Install/Update -> Available Software Sites'', select the repositories related to the installed plugins and ''Export'' them; then run Eclipse as normal user and ''Import'' them in the same panel.
 
  
== Enable javadoc integration ==
 
 
Want to see API entries when hovering the mouse pointer over standard Java methods?
 
Want to see API entries when hovering the mouse pointer over standard Java methods?
  
=== Online Version ===
+
=== Online version ===
  
If you have constant internet access on your machine, you can use the on-line documentation provided by sun. Just follow these instructions:
+
If you have constant Internet access on your machine, you can use the on-line documentation:
  
# Go to Window/Preferences, then go to Java/Installed JREs.
+
# Go to ''Window > Preferences'', then go to ''Java > Installed JREs''.
# There should be one named "java" with the type "Standard VM". Select this and click Edit.
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# There should be one named "java" with the type "Standard VM". Select this and click ''Edit''.
# Select the {{ic|/opt/java/jre/lib/rt.jar}} item under "JRE system libraries:", then click "Javadoc Location...".
+
# Select the {{ic|/opt/java/jre/lib/rt.jar}} item under "JRE system libraries:", then click ''Javadoc Location...''.
# Enter "http://java.sun.com/javase/6/docs/api/" in the "Javadoc location path:" text field.
+
# Enter "https://docs.oracle.com/javase/8/docs/api/" in the "Javadoc location path:" text field.
# Done!
 
  
=== Offline Version ===
+
=== Offline version ===
  
If you have no internet connection on your development machine or do not want to constantly consume bandwidth for the documentation, you can store the documentation locally, by installing the {{ic|openjdk[version]-src}} package. Eclipse should find the javadocs automatically.
+
You can store the documentation locally by installing the {{Pkg|openjdk8-doc}} package. Eclipse may be able to find the javadocs automatically.  If that does not work, set Javadoc location for rt.jar to {{ic|file:/usr/share/doc/java8-openjdk/api}}.
  
 
== Troubleshooting ==
 
== Troubleshooting ==
  
=== Autocompletion and javadoc render crash ===
+
=== Ctrl+X closes Eclipse ===
For some reason, libxul may crash Eclipse with a Traceback like
 
 
 
# Problematic frame:
 
# C  [libxul.so+0xd07552]  NS_InvokeByIndex_P+0x5e9a
 
  
To fix this issue, you can try installing {{Pkg|libwebkit}} and adding the following lines in your {{ic|/usr/share/eclipse/eclipse.ini}}:
+
Part of [https://bugs.eclipse.org/bugs/show_bug.cgi?id=318177 this] bug. Just look in {{ic|~/workspace/.metadata/.plugins/org.eclipse.e4.workbench/workbench.xmi}} and delete the wrong {{ic|Ctrl+X}} combination. Usually it is the first one.
  
-Dorg.eclipse.swt.browser.UseWebKitGTK=true
+
=== Dark theme ===
  
If that does not work (or if you do not want to use libwebkit) try this:
+
Eclipse supplies a Dark theme which can be enabled in Window > Preferences > General > Appearance and selecting the 'Dark' theme.
  
:1. Download http://ftp.mozilla.org/pub/mozilla.org/xulrunner/releases/1.9.0.17/runtimes/xulrunner-1.9.0.17.en-US.linux-i686.tar.bz2
+
The dark theme uses its own colours rather than the GTK theme colours, if you prefer it to fully respect GTK colour settings, then remove or move to backup sub folder all of the .css files from {{ic|/usr/share/eclipse/plugins/org.eclipse.ui.themes_1.0.0.xxxx/css/}}.
:2. Unpack it into {{ic|/home/<Username>/.xulrunner}} (or another location)
 
:3. Add this line to your Eclipse configuration file {{ic|/usr/share/eclipse/eclipse.ini}}:
 
  
-Dorg.eclipse.swt.browser.XULRunnerPath=/home/<Username>/.xulrunner
+
=== Change Default Window Title Font Size ===
  
:Now everything should just work fine and tooltips should display correctly.
+
You cannot change the window title font size using the Eclipse preferences, you must edit the actual theme .css files. Note, that you will have to redo this when you upgrade eclipse.
 +
They are located under
 +
/usr/share/eclipse/plugins/org.eclipse.platform_4.3.<your version number>/css
 +
Open the appropriate file with your text editor, ie e4_default_gtk.css if you are using the "GTK theme".
 +
Search for .MPartStack, and change the font-size to your desired size
 +
.MPartStack {
 +
        font-size: 9;
 +
        swt-simple: false;
 +
        swt-mru-visible: false;
 +
}
  
=== Crash on first boot or when choosing "Help -> Welcome" ===
+
=== Disable GTK+ 3 ===
See above.
 
  
=== Ctrl+X closes Eclipse ===
+
When the SWT GTK+ 3 UI is buggy and sometimes unusable, You can try to disable the use of GTK+ 3 with the SWT_GTK3=0 environment variable when you start eclipse:
Part of [https://bugs.eclipse.org/bugs/show_bug.cgi?id=318177 this] bug. Just look in {{ic|~/workspace/.metadata/.plugins/org.eclipse.e4.workbench/workbench.xmi}} and delete the wrong {{Keypress|Ctrl+X}} combination. Usually it is the first one.
+
SWT_GTK3=0 eclipse
  
=== Eclipse 4.2.0 not respecting dark/custom gtk themes resulting in white background ===
+
Another option to achieve the same effect is to add the following to {{ic|/usr/lib/eclipse/eclipse.ini}}.
Remove or move to backup sub folder all of the .css files from:
+
--launcher.GTK_version
/usr/share/eclipse/plugins/org.eclipse.platform_4.2.0.v201206081400/css/
+
2
  
Solution source: http://www.eclipse.org/forums/index.php/m/872214/
+
Those two lines must be added '''before''':
 +
--launcher.appendVmargs
  
=== Tooltips have dark background color with Gnome 3.6 Adwaita theme ===
+
=== Freshplayerplugin ===
  
Comment out the second-to-last line in {{ic|/usr/share/themes/Adwaita/gtk-2.0/gtkrc}} like this
+
Eclipse is not compatible with {{AUR|freshplayerplugin}}. See https://github.com/i-rinat/freshplayerplugin/issues/298.
  
#widget "gtk-tooltip*"  style "tooltips"
+
=== Eclipse 4.6 may not open the marketplace properly===
  
Related bugs:  
+
See [https://bugs.eclipse.org/bugs/show_bug.cgi?id=497729 this] bug. You can take following two steps to fix it:
  
* https://bugzilla.gnome.org/show_bug.cgi?id=688285
+
eclipse -consoleLog -application org.eclipse.equinox.p2.director -uninstallIU org.apache.httpcomponents.httpclient/4.3.6.v201411290715
* https://bugs.eclipse.org/bugs/show_bug.cgi?id=381010 (WONTFIX)
+
cd /usr/lib/eclipse/ && sudo rm plugins/org.apache.httpcomponents.httpclient_4.3.6.v201411290715.jar
  
=== Toggle buttons states are the same for selected/not selected ===
+
=== Show in System Explorer does not work ===
 +
See [http://help.eclipse.org/luna/index.jsp?topic=%2Forg.eclipse.platform.doc.user%2Freference%2Fref-9.htm&cp=0_4_1_52 this] guide. Go to '''Window''' > '''Preferences''' > '''General''' > '''Workspace''' and change the command launching system explorer. As Xfce user you may like to change it to {{ic|thunar ${selected_resource_uri} }} to open the selected folder with thunar.
  
Comment out the last line in {{ic|/usr/share/themes/Adwaita/gtk-2.0/gtkrc}} like this
+
=== Display issues under Wayland ===
 +
When running Eclipse on Wayland, you may encounter rendering issues such as slow response time to mouse events or chopped dialog windows (Bug report [https://bugs.eclipse.org/bugs/show_bug.cgi?id=483545]). A possible workaround for this issue is to force Eclipse to run under XWayland.
  
#widget "*swt*toolbar*" style "null"
+
With the superuser, open the file {{ic|/usr/bin/eclipse}} and append this line before the {{ic|exec}} line :
 +
    export GDK_BACKEND=x11
  
To apply the fixed theme, use {{ic|gnome-tweak-tool}} to select a different theme and cycle back to Adwaita.
+
This will force the execution of Eclipse on XWayland.
  
Related bugs:
+
== See also ==
  
* https://bugzilla.gnome.org/show_bug.cgi?id=687519
+
* [https://www.ibm.com/developerworks/library/os-ecl-subversion/ How to use Subversion with Eclipse]

Latest revision as of 18:35, 17 July 2017

Eclipse is an open source community project, which aims to provide a universal development platform. The Eclipse project is most widely known for its cross-platform integrated development environment (IDE). The Arch Linux packages (and this guide) relate specifically to the IDE.

The Eclipse IDE is largely written in Java but can be used to develop applications in a number of languages, including Java, C/C++, PHP, Perl and Python. The IDE can also provide subversion support and task management.

Installation

Install one of the following packages:

You cannot install multiple of these at the same time since they conflict, see FS#45577: choose the package above which most immediately fulfills your needs, and then add support for any additionally required languages through #Plugins.

Plugins

Many plugins are easily installed using pacman (see Eclipse plugin package guidelines for further informations). This will also keep them up-to-date. Alternatively, you can choose either the Eclipse Marketplace or the internal plugin manager.

Add the default update site

Make sure that you check that the default update site for your version of Eclipse is configured so that plugin dependencies can automatically be installed. The most current version of Eclipse is Oxygen and the default update site for it is: http://download.eclipse.org/releases/oxygen. Go to Help > Install new Software > Add, fill the name to easily identify the update site later - for instance, Mars Software Repository - and fill the location with the url.

Eclipse Marketplace

Note: make sure you have followed the Add the default update site section.

To use the Eclipse Marketplace, install it first: go to Help > Install new software > Switch to the default update site > General Purpose Tools > Marketplace Client. Restart Eclipse and it will be available in Help > Eclipse Marketplace.

Plugin manager

Note: make sure you have followed the Add the default update site section.

Use Eclipse's plugin manager to download and install plugins from their original repositories: in this case you have to find the needed repository in the plugin's website, then go to Help > Install New Software..., enter the repository in the Work with field, select the plugin to install from the list below and follow the instructions.

Note:
  • If you install plugins with Eclipse's plugin manager, you are advised to launch Eclipse as root: this way the plugins will be installed in /usr/lib/eclipse/plugins/; if you installed them as normal user, they would be stored in a version-dependent folder inside ~/.eclipse/, and, after upgrading Eclipse, they would not be recognized any longer.
  • Do not use Eclipse as root for your everyday work.

Updates via plugin manager

Run Eclipse and select Help > Check for Updates. If you have installed them as root as advised in the section above, you have to run Eclipse as root.

For plugins to be updated, you should check to have their update repositories enabled in Window > Preferences > Install/Update > Available Software Sites: you can find each plugin's repository(es) on the respective project website. To add, edit, remove... repositories just use the buttons on the right of the Available Software Sites panel. For Eclipse 4.5 (Mars), check you have enabled this repository:

http://download.eclipse.org/releases/mars

To receive update notifications, go to Window > Preferences > Install/Update > Automatic Updates. If you want to receive notifications for plugins installed as root, you should run Eclipse as root, go to Window > Preferences > Install/Update > Available Software Sites, select the repositories related to the installed plugins and Export them, then run Eclipse as normal user and Import them in the same panel.

List of plugins

  • AVR — AVR microcontroller plugin.
http://avr-eclipse.sourceforge.net/wiki/index.php/The_AVR_Eclipse_Plugin || eclipse-avrAUR
  • Aptana — HTML5/CSS3/JavaScript/Ruby/Rails/PHP/Pydev/Django support. Also available as standalone application.
http://www.aptana.com/ || aptana-studioAUR
  • IvyDE — IvyDE dependency Manager.
https://ant.apache.org/ivy/ivyde/ || eclipse-ivydeAUR
  • Markdown — Markdown editor plugin for Eclipse.
http://www.winterwell.com/software/markdown-editor.php || eclipse-markdownAUR
http://pydev.org/ || eclipse-pydevAUR
https://github.com/subclipse/subclipse || eclipse-subclipseAUR
  • Subversive — Alternative Subversion support.
https://www.eclipse.org/subversive/ || eclipse-subversiveAUR
  • TestNG — TestNG support.
http://testng.org/doc/eclipse.html || eclipse-testngAUR
  • TeXlipseLaTeX support.
http://texlipse.sourceforge.net/ || eclipse-texlipseAUR
  • Checkstyle — Eclipse Checkstyle support.
http://eclipse-cs.sourceforge.net/ || eclipse-checkstyleAUR

Enable javadoc integration

Want to see API entries when hovering the mouse pointer over standard Java methods?

Online version

If you have constant Internet access on your machine, you can use the on-line documentation:

  1. Go to Window > Preferences, then go to Java > Installed JREs.
  2. There should be one named "java" with the type "Standard VM". Select this and click Edit.
  3. Select the /opt/java/jre/lib/rt.jar item under "JRE system libraries:", then click Javadoc Location....
  4. Enter "https://docs.oracle.com/javase/8/docs/api/" in the "Javadoc location path:" text field.

Offline version

You can store the documentation locally by installing the openjdk8-doc package. Eclipse may be able to find the javadocs automatically. If that does not work, set Javadoc location for rt.jar to file:/usr/share/doc/java8-openjdk/api.

Troubleshooting

Ctrl+X closes Eclipse

Part of this bug. Just look in ~/workspace/.metadata/.plugins/org.eclipse.e4.workbench/workbench.xmi and delete the wrong Ctrl+X combination. Usually it is the first one.

Dark theme

Eclipse supplies a Dark theme which can be enabled in Window > Preferences > General > Appearance and selecting the 'Dark' theme.

The dark theme uses its own colours rather than the GTK theme colours, if you prefer it to fully respect GTK colour settings, then remove or move to backup sub folder all of the .css files from /usr/share/eclipse/plugins/org.eclipse.ui.themes_1.0.0.xxxx/css/.

Change Default Window Title Font Size

You cannot change the window title font size using the Eclipse preferences, you must edit the actual theme .css files. Note, that you will have to redo this when you upgrade eclipse. They are located under

/usr/share/eclipse/plugins/org.eclipse.platform_4.3.<your version number>/css

Open the appropriate file with your text editor, ie e4_default_gtk.css if you are using the "GTK theme". Search for .MPartStack, and change the font-size to your desired size

.MPartStack {
       font-size: 9;
       swt-simple: false;
       swt-mru-visible: false;
}

Disable GTK+ 3

When the SWT GTK+ 3 UI is buggy and sometimes unusable, You can try to disable the use of GTK+ 3 with the SWT_GTK3=0 environment variable when you start eclipse:

SWT_GTK3=0 eclipse

Another option to achieve the same effect is to add the following to /usr/lib/eclipse/eclipse.ini.

--launcher.GTK_version
2

Those two lines must be added before:

--launcher.appendVmargs

Freshplayerplugin

Eclipse is not compatible with freshplayerpluginAUR. See https://github.com/i-rinat/freshplayerplugin/issues/298.

Eclipse 4.6 may not open the marketplace properly

See this bug. You can take following two steps to fix it:

eclipse -consoleLog -application org.eclipse.equinox.p2.director -uninstallIU org.apache.httpcomponents.httpclient/4.3.6.v201411290715
cd /usr/lib/eclipse/ && sudo rm plugins/org.apache.httpcomponents.httpclient_4.3.6.v201411290715.jar

Show in System Explorer does not work

See this guide. Go to Window > Preferences > General > Workspace and change the command launching system explorer. As Xfce user you may like to change it to thunar ${selected_resource_uri} to open the selected folder with thunar.

Display issues under Wayland

When running Eclipse on Wayland, you may encounter rendering issues such as slow response time to mouse events or chopped dialog windows (Bug report [1]). A possible workaround for this issue is to force Eclipse to run under XWayland.

With the superuser, open the file /usr/bin/eclipse and append this line before the exec line :

   export GDK_BACKEND=x11

This will force the execution of Eclipse on XWayland.

See also