Target JRE in Eclipse

Question

How should I change Target JRE in Eclipse. I was earlier using jdk1.7, now I want to use JDK 1.6. But while running my java program I am getting Unsupported Class Version Er

Answer 1

You should right-click the project and set the Java Build Path to use the 1.6 JDK and at the Java Compiler settings set the compliance level to 1.6.

If you don't have the 1.6 option, you probably didn't add the 1.6JDK to the Installed JREs list. To do this go to Window > Preferences > Java > Installed JREs and add it there.