drawfigures.java

有大量的java的实例

import java.awt.*;
import java.applet.Applet;
public class DrawFigures extends Applet
{
    public void paint ( Graphics g)
    {
    g.drawLine(30,5,40,5);		            //画直线
    g.drawRect(40,10,50,20);      //画矩形框（左上角x坐标，左上角y坐标
                                  // x轴尺寸，y轴尺寸）
    g.fillRect(60,30,70,40); 				//画实心矩形
	    g.drawRoundRect(110,10,130,50,30,30); 	 //画圆角矩形框
	    g.drawOval(150,120,70,40);			 //画椭圆形框
                 //左上角x坐标，左上角y坐标，x轴尺寸，y轴尺寸
                 //若x轴尺寸与y轴尺寸相等，则画出圆形
	    g.fillOval(190,160,70,40);		     //画实心椭圆
	    g.drawOval(90,100,50,40);		     //画椭圆框
	    g.fillOval(130,100,50,40);		     //画实心椭圆
	    drawMyPolygon(g);		 //自定义的画多边形的方法
	    g.drawString("They are figures!",100,220);	
    }
    public void drawMyPolygon( Graphics g)
    {
	    int[]  xCoords = { 30,50,65,119,127}; //保存多边形各点X坐标的数组
	    int[]  yCoords = {100, 140,127,169,201}; //保存多边形各点Y坐标的数组
	    g.drawPolygon( xCoords,yCoords,5);		//画自由多边形框
    }    
}