?? driver.java
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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(); }}
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