java label 不可以改变大小_java在label 上设置图片并且可以随便改变大小的方法

import java.awt.Image;

import javax.swing.ImageIcon;

import javax.swing.JFrame;

import javax.swing.JLabel;

public class Test extends JFrame {

public Test() {

int width = 100;

int height = 100;

ImageIcon image = new ImageIcon(this.getClass().getResource("bird.gif"));

image.setImage(image.getImage().getScaledInstance(width,height,Image.SCALE_DEFAULT));

JLabel label = new JLabel(image);

getContentPane().add(label);

setBounds(100, 100, 200, 200);

setDefaultCloseOperation(EXIT_ON_CLOSE);

setVisible(true);

}

public static void main(String[] args) {  new Test().setVisible(true);  } }