如何在Java JFrame中放置背景图像

Question

package com.company;


import javax.imageio.ImageIO;
import javax.swing.*;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

public class Main extends JFrame{
    JButton button;
    JLabel text;
    JFrame frame;
    JPanel panel;

    public static void main(String[] args) {
        new Main();
    }
    public Main(){
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setTitle("flappyBird");
        setLocationRelativeTo(null);
        setVisible(true);
        setSize(new Dimension(100,100));
        setExtendedState(JFrame.MAXIMIZED_BOTH);

        BufferedImage img = null;
        try {
            img = ImageIO.read(new File("C:\\Users\\m11\\Documents\\FlappyBird\\spirit\\base.png"));
        } catch (IOException e) {
            e.printStackTrace();
        }
        Image dimg = img.getScaledInstance(800, 508, Image.SCALE_SMOOTH);
        ImageIcon imageIcon = new ImageIcon(dimg);
        setContentPane(new JLabel(imageIcon));
    }

}

Answer 1

请尝试以下示例：

JFrame f = new JFrame();
try {
    f.setContentPane(new JLabel(new ImageIcon(ImageIO.read(new File("test.jpg")))));
} catch (IOException e) {
    e.printStackTrace();
}
f.pack();
f.setVisible(true);

或者，另一个伟大的方式来实现你的目标将是使用背景面板。

并且请尽量避免使用绝对路径，它们几乎总是在更改目录或系统时破坏应用程序。