example6_1.java

书中的例题

/* 直线、矩形、圆形 */
import java.awt.*;
import javax.swing.*;
public  class Example6_1  extends JFrame
{
  Example6_1()
	{
	 super("简单图形");
     setSize(200,200);
	 setVisible(true);
	}
  public void paint(Graphics e)
	{
      e.drawLine(50,50,120,120);
      e.drawRect(50,50,70,70);
	  e.drawOval(70,70,90,90);
	}
  public static void main(String args[])
	{
      new Example6_1();
	}
}