Static variables and methods

[sudharani]

in java a static method can access only static data members but main() is a static method
still it is accessing the instance data members by creating an object of other class.
how can it be possible?"

[JosAH]

in java a static method can access only static data members but main() is a static method
still it is accessing the instance data members by creating an object of other class.
how can it be possible?"

Show us an example; main( ... ) doesn't have special privileges; if it can create an object of another class and fiddle with its members those members are reachable for any other method (possibly in the same package).

kind regards,

Jos

[sunde887]

It is creating objects that are local to the static method main. It's fine to do this, any method can create instances of objects locally for use in the method. Once the main method ends, the program is done.

For instance, these two are fine

public class X{
  public static void XMethod(){
    String s = "Hello";
    System.out.println(s);
  }
  public void XMethod2(){
    String s = "Hello";
    System.out.println(s);
  }
}

It isn't referencing non static variables, it is creating it's on local object and using them.

[sudharani]

Thank you.:)

[colorsjiya]

static variables do not change between instances, meaning if you have two instances of class time.

[JosAH]

It is creating objects that are local to the static method main. It's fine to do this, any method can create instances of objects locally for use in the method. Once the main method ends, the program is done.

For instance, these two are fine

public class X{
  public static void XMethod(){
    String s = "Hello";
    System.out.println(s);
  }
  public void XMethod2(){
    String s = "Hello";
    System.out.println(s);
  }
}

It isn't referencing non static variables, it is creating it's on local object and using them.

You and I must've answered to entirely differen questions; I thought that the question was about this (sort of):

public static void main(String[] args) {
   Whatever foo= new Whatever();
   foo.x= 42; // <-- main( ... ) is allowed to do this while others aren't ...
}

Oh well, as long as the OP is happy ;-)

kind regards,

Jos