On running Jdevloper for first time you may see the below error
ERROR:
Unable to launch the Java Virtual Machine
Located at path:
..\..\jdk\jre\bin\client\jvm.dll
SOLUTION:
1. go to Control Panel->System->Advanced System Settings->Environmental Variables
2. Update the ‘Path’ setting to include the following directory: ‘<jdev home dir>\jdevbin\jdk\bin’
3. Reopen the jDeveloper.