System.out.println removal/comment from multiple java source files

Question

I want to remove/comment all the occurrences of System.out.println from my java code. This System.out.println may be inside if ,

Answer 1

In case you do not use IDE, on Linux:

sed '/System.out.println/d' %YOUR_PROJ_DIR%/*.java

on Windows you can do the same if you have a cygwin installed.