Eclipse allow you to start your program via the launcher framework which is very powerful and makes life simple.
Sometimes you want to see the command line which Eclipse uses to start your program. Especially if the program does not want to start and you want to know why. To get the command line statement, run your program and switch to the debug perspective. Here you see your running programs.
Right click on the process and select properties. The next window show you the command line statement the launcher created and used.
I hope this help. Thank to Frederic Conrotte for pointing this out to me.