drawpolygon.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 java.awt.event.*;
import javax.swing.*;
 public class DrawPolygon extends JFrame {
   public DrawPolygon (){
     super( "绘制多边形" );
     setSize(470,300);
     setVisible(true);
   }
   public void paint( Graphics g ){
      super.paint(g);
      g.setColor(Color.red);
      int xValues[] = {122,100,28,86,64,122,180,158,217,144};
      int yValues[] = {56,122,122,164,230,190,230,164,123,122};
      Polygon polygon1 = new Polygon( xValues,yValues,10);
      g.drawPolygon(polygon1);
      int xValues2[] = {326,304,230,290,268,326,384,362,421,348};
      int yValues2[] = {56,123,123,165,231,191,231,165,123,123};
      Polygon polygon2=new Polygon(xValues2,yValues2,10);
      g.fillPolygon(polygon2);
      g.setColor(Color.black);
      int xValues3[] = {67,155,227,311,389};
      int yValues3[] = {260,231,269,234,273};
      g.drawPolyline( xValues3, yValues3,5);
 }
  public static void main( String args[] ){
    DrawPolygon app = new DrawPolygon ();
    app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE );
  }
}