Question

java编一个显示图片的程序。但我的却什么都不显示，大神看看我的哪里错了

Answer 1

去掉你JFrame中的paint方法，添加如下代码：

class Mypane extends JPanel{

    Image a;

    public Mypane(){

        a = ImageIO.read("c:\\1.png");

    }

    protected void paintComponent(Graphics g){

        super.paintComponent(g);

        g.drawImage(a,100,100,null);

    }

    public void static main (String[] a){

        sy1 y = new Sy1();

        y.add(new Mypane());

    }

}

Answer 2

package com.test.demo;

import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Image;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;

public class sy1 extends Frame{

Image a;
Graphics g;
sy1(){
setVisible(true);
setSize(500, 500);
try {
a = ImageIO.read(new File("e:\\1.png"));
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

public void paint(){
g = this.getGraphics();
g.drawImage(a, 100, 100, null);
}

public static void main(String[] args) {
sy1 y = new sy1();
y.paint();
}
}
修改了你的代码。。。。。