问题
There is no syntax highlighting in java files in my eclipse..This happened all of a sudden..Not sure why..
This is how it is looking now..

As mentioned in other posts..i tried to change the color from preferences window and there is nothing when i type java..something really messed up...

AAny suggestions..
Update:
It seems Java plugin is not installed..as per the below screeenshot

And when i try to install java plugin it says new version is already installed as per the below screenshot

回答1:
Closing the file's tab and re-opening it fixed it for me.
(I actually closed all the tabs...)
回答2:
I faced the same issue all of a sudden after a commit/update project operation.
The point is, default editor of Eclipse has changed somehow and we have to set it back to normal.
Try the below method,
1. Goto Windows -> Click Preferences
2. From the Preferences window goto General -> Editors -> Click File Associations
3. You can choose the default editor for *.java files here
When I first opened Preferences, 'Text editor' was set as the default editor for .java files and then I changed it back to 'Java Editor'.
Now it works perfectly fine.
回答3:
You probably have a corrupt installation or you have recently installed a corrupt plugin.
The following steps might help.
In your Install window,
- view your "already installed" plugins.
- select the "Installation History" tab.
- select a previous stable configuration
- Click the "Revert" button
来源:https://stackoverflow.com/questions/17984485/no-syntax-highlighting-in-eclipse-for-java