Problem : Eclipse does not run any JAVA program because it is not loading any JREs. Window -> Preferences -> Java -> Installed JREs An error has occurred when creating this preference page. No JREs loaded :( Solution: Solution is to reset the JAVA timezones . 1. sudo apt-get --reinstall install tzdata-java 2. putting the line -Dcom.ibm.icu.util.TimeZone.DefaultTimeZoneType=ICU at the end of eclipse.ini Source: http://askubuntu.com/questions/186986/eclipse-has-multiple-issues-after-jre-6-openjdk-upgrade/187043#187043?newreg=ce380b31191b40948500f37474958dce