structure of java program(i m using eclipse)

[pooran.c]

steps
1.I create a java project.
2.in the same java project i ll create a main class(say sample).
3.i ll call a function(say sample_function()) inside main class.

question is:

where should i implement the function(sample_function()) i.e
should i have to create a new class in the same project or i should define a new class above main class and implement the function in that class

and in the later case i.e if i create new class in the same project how to call the function in the same class without creating the object of that class in the main class?

[JamesCherrill]

From the info you have given the method could be defined in either place.
If you define it in a different class then how you call it depends on whether it's static or not:
If static, call it using the class name, no instance required
If not static, you need an instance of its class to call the method.