driver.java

Java程序设计(美) David D. Riley著 机械工业出版社 书籍配套 代码

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

/** Program to display an indirect variant of the Sierpinski Gasket
 *  (similar to example from Figure 14.24)
 *  Author: David Riley
 *  Date: January, 2005
 */
public class Driver  {
	private JFrame win;

	public Driver()   {
		win = new JFrame("Sierpinski Gasket");
		win.setBounds(10, 10, 600, 620);
		win.setVisible(true);
		win.setLayout(null);
		displayDownTriangle(300, 0, 600, 7);
		win.repaint();
	}
    
	private void displayDownTriangle( int x, int y, int h,  int lev )   {
		DownTriangle triangle;
		triangle = new DownTriangle(x, y, h);
		win.add(triangle, 0);
		if (lev > 1)   {
			displayUpTriangle(x, y+h, h/2, lev-1);
		}
	}
	
	private void displayUpTriangle( int x, int y, int h,  int lev )   {
		UpTriangle triangle;
		triangle = new UpTriangle(x, y, h);
		win.add(triangle, 0);
		if (lev > 1)   {
			displayDownTriangle(x, y-h, h/2, lev-1);
		}
	}

}