Java Swing图形编程

Graphics类的常用方法

摆动显示图形的示例：

import java.awt.*;
import javax.swing.JFrame;

public class DisplayGraphics extends Canvas{
	
	public void paint(Graphics g) {
		g.drawString("Hello", 40, 40);
		setBackground(Color.WHITE);
		g.fillRect(130, 30, 100, 80);
		g.drawOval(30, 130, 50, 60);
		setForeground(Color.RED);
		g.fillOval(130, 130, 50, 60);
		g.drawArc(30, 200, 40, 50, 90, 60);
		g.fillArc(30, 130, 40, 50, 180, 40);
		
	}
		public static void main(String[] args) {
		DisplayGraphics m=new DisplayGraphics();
		JFrame f=new JFrame();
		f.add(m);
		f.setSize(400, 400);
		//f.setLayout(null);
		f.setVisible(true);
	}

}