Hi Guys,
I have resorted to this forum in search of a solution. I am using JDeveloper 12.1.3.0.0 which comes with built in WL 12.1.3.0.0. I am trying to use java 8 new features (lambda expressions).
I have installed jdk1.8.0_112, i have modified jdev.conf file to the path where I have installed this jdk8. From what I've read WL 12.1.3 supports jdk8 and also JDeveloper 12.1.3:
Oracle JDeveloper 12c (12.1.3) New Features -> taken from Oracle site.
Java SE 8 Preview While this version of JDevleoper must run with a Java SE 7 JDK, you can add Java SE 8 as a Java SE library (Tools > Manage Libraries, Java SE Definitions tab) and use that to compile and test against. Make sure your target deployment environment supports Java SE 8!
JDeveloper is able to start with it jdk 8 also WL is starting just fine, it compiles and deploys to the built in WL an already built application (using jdk1.7). Everything is OK. But when I'm trying to add some lambdas inside this already existing application..compiler halts and this is the message I am getting:

If I go to Help -> About it seems fine:

Do you have any advice? Maybe I am missing something.
Thanks in advance.