testimage.java

自己做的超市管理系统

package shopingmanager;

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

import java.io.Serializable;

public class TestImage extends JPanel implements Serializable
{
        private Image imgBackGround=null;

        public TestImage()
        {
                imgBackGround=new BufferedImage(200,200,BufferedImage.SCALE_REPLICATE);
                Graphics g=imgBackGround.getGraphics();
                g.setColor(Color.white);
        //	g.clearRect(0,0,200,200);
                g.drawString("Now no image",50,50);
        }

        public void setImage(String  strImageName)
        {
                imgBackGround=Toolkit.getDefaultToolkit().getImage(strImageName);
                repaint();
        }

        public void paintComponent(Graphics g)
        {
                g.drawImage(imgBackGround,0,0,getSize().width,getSize().height,this);
        }

}