Currently only the method is displayed:  see eclipse: 
Activity
akaroml commentedon Sep 21, 2017
We could have an option in launch.json to show full qualified name in call stack window.
testforstephen commentedon Sep 21, 2017
java supports method overloading. Also need evaluate if it's necessary to show the method signature or not.
testforstephen commentedon Oct 13, 2017
The code has merged to master branch.