Question

java label的图片无法显示

package ui;

import java.awt.Dimension;
import java.awt.Toolkit;

import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class FrameGame extends JFrame{
JPanel PanelStart=new JPanel();

public FrameGame(){

this.setTitle("坑啊");
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.setSize(800, 600);
this.setResizable(false);

//居中
Toolkit toolkit = Toolkit.getDefaultToolkit();
Dimension screen = toolkit.getScreenSize();
int x = (screen.width-this.getWidth())/2;
int y = (screen.height-this.getHeight())/2;
this.setLocation(x, y);//
this.add( PanelStart);

}
public void PanelStart(){

JLabel bg01=new JLabel(new ImageIcon(Toolkit.getDefaultToolkit().
getImage(getClass().getResource("picture/background/bg01.jpg"))));

bg01.setLocation(0, 0);
bg01.setSize(800,600);
PanelStart.add(bg01);

}

}

Answer 1

JLabel bg01=new JLabel(new ImageIcon(Toolkit.getDefaultToolkit().
getImage(getClass().getResource("picture/background/bg01.jpg"))));更改为：
JLabel bg01 =new JLabel();
ImageIcon icon= new ImageIcon("picture/background/bg01.jpg"); //路径一定要写对
bg01.setIcon(icon);

Answer 2

确定路径没有写错，在new JLabel前面打印图片路径检查是否出错。根据经验判断你的另应该是使用相对路径要在picture前面加上“/”试试