Dimensions of a Frame

The setSize() method of JFrame changes the size of the frame on the computer monitor. The size can be changed as the program runs. For example, the following program works (although it is mostly useless):

import java.awt.*;
import javax.swing.*;

public class TestFrameExpand
{
  public static void main ( String[] args )
  {
    int height=100, width=200;
    JFrame frame = new JFrame("Test Frame Extra");

    frame.setVisible( true );
    frame.setDefaultCloseOperation( WindowConstants.EXIT_ON_CLOSE );

    for ( int extra=0; extra<500; extra+=1 )
      frame.setSize( width+extra, height+extra );
  }
}

The frame starts out with size 200 by 100, and then grows larger.