Oracle developer, Type the full pathname of a J2SE installation
When your oracle developer installation asks you for a path to a java installation like:
Type the full pathname of a J2SE installation (or Ctrl-C to quit), the path will be stored in ~/.sqldeveloper/jdk
Try to search for java installations like this:
locate java | grep '/java$'
Or look yourself in
The path that is needed is the path above the bin dir. Example: