Ant use -source 7 or higher to enable diamond operator

Question

I am sure this is pretty easy qoestion, but I am stuck with building Android app using Ant from commandline. I have got this message: (use -source 7 or higher to enable d

Answer 1

Just to clarify, I changed my ant.properties as follows:

java.target=1.7
java.source=1.7

Making changes in build.xml before the above suggested line didn't work for me for some reason.