drawarcsapplet.java

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// Fig. 2.9_01: DrawArcsApplet.java
// 绘制空心圆弧

import java.awt.*; // 引入 java.awt包中所有的类
import javax.swing.*; // 引入 javax.swing包中所有的类

public class DrawArcsApplet extends JApplet
{
    // 在applet上绘制空心圆弧
    public void paint(Graphics g)
    {
        // 调用父类的 paint 方法
        super.paint(g);

        //设置字体
        g.setFont(new Font("汉真广标", Font.PLAIN, 35));
        g.drawString("空心圆弧的画法", 10, 40);

        // 绘制浅灰色矩形
        g.setColor(Color.LIGHT_GRAY);
        g.drawRect(10, 60, 150, 120);
        g.drawRect(210, 60, 120, 120);
        g.drawRect(10, 210, 150, 120);
        g.drawRect(210, 210, 120, 120);

        g.setColor(Color.BLUE);

        //绘制空心圆弧1		
        g.drawArc(10, 60, 150, 120, 0, 360);

        // 绘制空心圆弧2
        g.drawArc(210, 60, 120, 120, 90, 270);

        g.setColor(Color.RED);

        //绘制空心圆弧3
        g.drawArc(10, 210, 150, 120, 30, - 150);

        // 绘制空心圆弧4
        g.drawArc(210, 210, 120, 120,  - 90,  - 270);

    } // paint 方法结束

} //  DrawArcsApplet 类结束

/**************************************************************************
 * (C) Copyright 2004-2005 by Jingkui Zhong(钟京馗) and Huan Tang(唐桓).  *
 * All Rights Reserved.                                                   *
 *                                                                        *
 * DISCLAIMER: The authors of this code have used their                   *
 * best efforts in preparing the code. These efforts include the          *
 * development, research, and testing of the theories and programs        *
 * to determine their effectiveness. The authors and publisher make       *
 * no warranty of any kind, expressed or implied, with regard to these    *
 * programs or to the documentation contained in these codes. The authors *
 * shall not be liable in any event for incidental or consequential       *
 * damages in connection with, or arising out of, the furnishing,         *
 * performance, or use of these programs.                                 *
  **************************************************************************/