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

class One extends JFrame {
  One() {
    Two b = new Two();
    Container c = this.getContentPane(); 
    c.add(b); 
    this.setVisible(true); 
    this.setSize(400, 400); 
    this.setDefaultCloseOperation( 3 ); 
  } 
  public static void main(String[] args) {
    One a = new One(); 
  } 
}

class Two extends JComponent implements MouseMotionListener {
  public void mouseMoved(MouseEvent e) {

  }
  public void mouseDragged(MouseEvent e) {

  }

  public void paintComponent(Graphics g) {

  }
}