How to make a simple window.

Heya...
I just wanted to help some new people by showing you how to simply make a window.
Here we go.
  !
  !
  !
  !
 \/

import javax.swing.*; // The import




public class Training {  //Your class
public static void main(String[] args){  //Main Method

new Training();
}
public Training(){
JFrame f = new JFrame();
f.setTitle("THE TITLE"); // This sets the title for your window.
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //Exit one close, closes the window when you press the X.
f.setSize(700, 500); // This sets the size of the window.
f.setVisible(true); //Makes the window visible.
f.setLocationRelativeTo(null); // Makes the window appear in the middle.
}

}