Scala IDE for Eclipse

No Scala functionality

If the Scala functionality appears to be non-functional after installing the Scala IDE and restarting Eclipse, in particular if Scala source files appear to be being interpreted as Java (with a consequently large number of "Java problem"s being reported against them, then please ensure that JDT Weaving is enabled by navigating to "Preferences → JDT Weaving" then, if disabled, click the button to enable and follow the instructions to restart Eclipse. If this doesn't resolve your problem, check that JDT Weaving is still enabled after the restart.

Note:

• Spring IDE breaks JDT weaving - http://sebastian.marsching.com/blog/archives/106-Spring-IDE-for-Eclipse-breaks-JDT-weaving.html
• The Groovy-Plugin and/or the Webtools-Platform causes problems too

Use with read-only installations of Eclipse 3.4.2 or earlier

The Scala IDE can be added to a readonly Eclipse 3.4.2 installation, however this is fiddly and system dependent and upgrading to Eclipse 3.5 is recommened. If you are unable to do this, instructions for installing into a read-only or otherwise unusually laid out Eclipse can be found in the section "Installing JDT Weaving in a non-default location" of this guide.

Eclipse issues on Ubuntu (version?) with the default JDK (version?)

As of (date?) on Ubuntu, Eclipse has issues running with the default JDK. You should make sure it runs with Sun's JDK, see instructions here and/or here. Eclipse users on Ubuntu report that this significantly improves performance and stability.