drawgraphics.java

Java程序设计实用教程源代码 本书源代码按章分别放置在不同的文件夹中,所有程序均在JDK1.6环境下编译运行正常,除了第13章需要建立ODBC数据源之外,其他程序只要有Java运行环境即可直接运行

import java.awt.*;
import javax.swing.*;
 public class drawGraphics extends JFrame {
   public drawGraphics(){
     super("使用Graphics对象绘制图形" );
     setSize(340,130);
     setVisible(true);
   }
   public void paint(Graphics g){
     super.paint(g);
     g.setColor(Color.BLACK);
     g.drawLine(40,40,70,40);
     g.setColor(Color.blue);
     g.drawRect(80,40,30,30);
     g.setColor(Color.CYAN);
     g.fillRect(120,40,30,30);
     g.setColor(Color.DARK_GRAY);
     g.drawRoundRect(160,40,30,30,10,10);
     g.setColor(Color.GRAY);
     g.fillRoundRect(200,40,30,30,10,10);
     g.setColor(Color.GREEN);
     g.draw3DRect(240,40,30,30,false);
     g.draw3DRect(280,40,30,30,true);
     g.setColor(Color.LIGHT_GRAY);
     g.fill3DRect(40,80,30,30,false);
     g.fill3DRect(80,80,30,30,true);
     g.setColor(Color.MAGENTA);
     g.drawOval(135,80,30,30);
     g.fillOval(175,80,30,30);
     g.setColor(Color.ORANGE);
     g.drawArc(215,80,30,30,0,180);
     g.fillArc(255,80,30,30,0,180);
     g.fillArc(295,80,30,30,0,360);
  }
  public static void main(String args[]){
	drawGraphics app = new drawGraphics();
	app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE );
  }
}