import java.awt.Color;import javax.swing.JFrame;/** Triangle Driver  (Figure 8.18) *  Author: David Riley *  Date: May, 2004  */public class Driver  {    public Driver()   {        JFrame  theWin = new JFrame("Example use of Triangle");        Triangle leftTriangle, rightTriangle;                theWin.setBounds(100, 100, 250, 200);        theWin.setVisible(true);        theWin.setLayout(null);        theWin.setBackground( Color.white );                leftTriangle = new Triangle();        leftTriangle.setBounds(10, 10, 100, 50);        leftTriangle.setBackground( Color.lightGray );        theWin.add(leftTriangle, 0);                rightTriangle = new Triangle();        rightTriangle.setBackground( Color.black );        rightTriangle.setBounds(150, 20, 50, 150);        theWin.add(rightTriangle, 0);        theWin.repaint();    }}