main() is the entry point

[Arnb Sen]

Hi All,

I am a bit confused here.

main() is the entry point for all applications. main() is the static method. So as is expected a static method can call from within another static method or static variable.

So my question is

methods called from within the main() method must be static. Variables called must be static.

So does it not mean that everything will have to be static ?

[Dave Salter]

Methods called from within main() do not have to be static if they belong to a class that you have instantiated within main().

So, you can instantiate classes within main() and call methods on them.

[fred rosenberger]

often, one of the first things you'll see in Class A's main method is a creation of an object of type A... i.e. within main you'll see

A myA = new A();

now you can call A's non-static methods within main, on a

myA.nonStaticMethod1();
myA.nonstaticMethod2();

etc.

[Gregg Bolinger]

I think a simple example here is worth 1000 words.

public class Foo
{
   private String name;
 
   public Foo()
   {
      name = "Gregg";        
   }
 
   public String getName()
   {
      return name;
   }
 
   public static void main(String[] args)
   {
      Foo foo = new Foo();
      System.out.println(foo.getName());
   }
}

[Arnb Sen]

oh ok.. Thanks