graphicsdemo.java

学习参考,java基本语法练习,包括一些常用的技巧

import java.awt.*;
import javax.swing.*;
public class GraphicsDemo extends JApplet
{
	//当JFrame或Applet成为焦点时,paint方法会自动调用
	public void paint(Graphics g)
	{
		g.setColor(Color.CYAN);//设置绘制图形颜色
		for (int i=0;i<400;i+=10)
			g.drawLine(i,0,i,300);//绘制竖线
		for (int i=0;i<300;i+=10)
			g.drawLine(0,i,400,i);//绘制横线
		g.setColor(Color.BLUE);
		g.drawRect(50,50,100,100);//绘制矩形
		g.setColor(Color.RED);
		g.drawRoundRect(110,110,170,170,20,10);//绘制圆角矩形
		g.drawOval(90,90,35,30);//绘制椭圆和圆
		g.setColor(Color.PINK);
		g.fill3DRect(130,30,180,100,true);//填充3D矩形
		g.setColor(Color.ORANGE);
		g.fillArc(160,160,200,200,0,90);//填充扇形
		Font myFnt=new Font("Times New Roman",Font.BOLD+Font.ITALIC,20);
		g.setFont(myFnt);	//设置字体
		g.setColor(Color.BLACK);
		g.drawString("This is an example of Graphics",80,150);//绘制文字
	}
}