drawinappletdemo.java

本java源程序包括了大量的学习程序（共27章）方便大家学习

import java.applet.*;
import java.awt.*;
public class DrawInAppletDemo extends Applet
{
	public void init()  //Applet初始化方法
	{
		this.setBackground(Color.GRAY);
	}
	public void paint(Graphics g)  //Applet绘制图形方法
	{
		//在制定位置绘制字符串
		g.drawString("Drawing in Applet",10,20);		
		g.drawLine(20,30,100,30);//在制定位置绘制直线
		
		g.drawRect(20,40,100,20);  //在制定位置绘制矩形
		g.drawRoundRect(20,70,100,20,20,20);  //在制定位置绘制圆角矩形
		//绘制填充矩形、填充圆角矩形
		g.setColor(Color.CYAN);   //设置颜色
		g.fillRect(20,100,100,20);
		g.fillRoundRect(20,130,100,20,10,10);
		//绘制椭圆、填充椭圆
		g.setColor(Color.BLUE);
		g.drawOval(20,160,100,20);
		g.fillOval(20,190,100,20);
		//绘制圆形、填充圆形
		g.setColor(Color.RED);
		g.drawRoundRect(160,30,80,80,80,80);
		g.fillOval(250,30,80,80);
		//绘制圆弧
		g.setColor(Color.GREEN);
		g.drawArc(160,120,80,50,0,180);
		g.drawArc(240,120,80,50,180,180);
		//绘制填充圆弧
		g.setColor(Color.YELLOW);
		g.fillArc(160,180,80,50,0,180);
		g.fillArc(240,180,80,50,180,180);
		g.setColor(Color.orange);
		g.fillArc(350,30,120,80,-90,270);
		g.drawArc(350,120,120,80,-90,270);
		//绘制三角形
		g.setColor(Color.MAGENTA);
		int x1[] = {70,20,120};
		int y1[] = {250,300,300};
		g.drawPolygon(x1,y1,x1.length);
		int x2[] = {240,190,290};
		int y2[] = {250,300,300};		
		g.fillPolygon(x2,y2,x2.length);	
		//绘制五边形
		g.setColor(Color.BLUE);
		int x3[] = {400,350,370,430,450};
		int y3[] = {230,270,310,310,270};
		g.fillPolygon(x3,y3,x3.length);
		g.clearRect(370,260,60,30); //在五边形中用背景色清除出一个矩形
	}
}