java.util cannot be resolved !

Context :

After upgrading my java sdk on my linux, eclipse did not seem to recognise any of the java packages anymore. At first I thought, “… yep that’s probably because eclipse doesn’t reference the latest version…”, only to be proven incorrect. After hours of trying to configure eclipse properly, I was beginning to lose hope. I had already tried….

1) to select the correct version under the ‘preferences > java > installed JREs’,

2) to select the correct compiler compliance level under ‘preferences > java > compiler’,

3) to reselect the correct server version under ’server > installed runtimes’,

… but to no avail !

Solution :

Alhumdulillah, eventually after some time the problem was resolved. Essentially, the problem was that after the java upgrade on my machine, somehow eclipse managed to ‘unbound’ a few libraries from the build path. This unbinding was undone to reactive the libraries as follows…

Step 1: Select the project properties from the ‘Project Explorer’.

Step 2: Select ‘Java Build Path > Libraries’.

Step 3: Select individually the ‘unbound’ libraries, press ‘Edit…’ and reselect (re-bind) the appropriate versions. Particularly in my case the…

i) ‘JRE System Library [...version...] > Edit… > Workspace default JRE (…version…)’, and
ii) ‘Apache Tomcat v6.0 [apache-tomcat-...version...] > Edit… > apache-tomcat-…version…‘.

… and voala. Eclipse back to normal. If you have any further comments, please let me know.

… Wa Allahu A’lam.