JDK-1.6.0 Setup

After installation JDK-1.6.0 in your operating system, run Eclipse and select Window/Preferences.

preferences-jre

In section Java/Installed JREs press Add button. In the new opened window enter path to installed JDK-6. In my case it is /opt/jdk1.6.0. It also good to set name to sun-jdk-1.6.0.

preferences-jre-add