I understood what 1 and 3 do.But what's the purpose bof writing the classname(Foo) two times in command no. 2.
Can any one explain?
Thanx in advance.
I think you mistyped the name of your class i.e Foo1 instead of Foo. Anyway the following command
java -ea:Foo Foo
runs the program called Foo with Assertions enable only in package Foo and its subpackages.
you might have a package called Foo then.