Thread: Setting a background image on a gameFrame

I'm trying to make minesweeper and a struggling trying to make a background image for my JFrame. I think the program breaks when setContentPane(screen) is run.

 
 
 
//pakke der styrer farver
import java.awt.Color;
import javax.swing.*;
//Pakke der hjælper med at lave vinduet
import javax.swing.JFrame;
import java.awt.*;
 
import java.awt.Font;
import java.awt.FontFormatException;
 
import java.io.File;
import java.io.IOException;
import java.awt.event.*;
import javax.swing.JLabel;
import javax.swing.JPanel;
import java.awt.GraphicsEnvironment;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
 
public class GameFrame extends JFrame {
    // CENTER regions størrelse
    static final int SCREEN_WIDTH = 1100;
    static final int SCREEN_HEIGHT = 800;
    Font technology;
 
    // De forskellige JPanels
    JPanel topMenu;
    JPanel screen;
    JLabel mineCounter;
    JLabel timer;
    JButton btnNewButton;
 
    GameFrame() {
 
        try {
            setContentPane(new JLabel(new ImageIcon(ImageIO.read(new File("Images/background.png")))));
        } catch (IOException e) {
            e.printStackTrace();
        }
 
        pack();
 
        try {
            // load a custom font in your project folder
            technology = Font.createFont(Font.TRUETYPE_FONT, new File("technology.regular.ttf")).deriveFont(100f);
            GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
            ge.registerFont(Font.createFont(Font.TRUETYPE_FONT, new File("technology.regular.ttf")));
        } catch (IOException | FontFormatException e) {
 
        }
 
        screen = new JPanel();
        screen.setLayout(new BorderLayout());
 
        // adding top menu
        addTopMenu();
        // adding game
        screen.add(new GamePanel(), BorderLayout.CENTER);
        // adding side menu
 
        //add(screen);
 
        setContentPane(screen);
 
        // Stopper programmet når vinduet lukkes
 
 
 
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
        // Vinduets størrelse
        // setSize(SCREEN_WIDTH, SCREEN_HEIGHT);
 
        // Vinduets baggrundsfarve
        //this.setBackground(Color.BLACK);
 
        // Viser vinduet
        //setVisible(true);
 
 
        setVisible(true);
 
        // Gør at man ikke kan ændre størrelse på vinduet
        setResizable(false);
 
    }
 
    // Indeling af kode. Den del af koden som laver top menuen.
    void addTopMenu() {
        topMenu = new JPanel();
        topMenu.setLayout(new BoxLayout(topMenu, BoxLayout.X_AXIS));
 
        topMenu.setBackground(Color.gray);
 
        mineCounter = new JLabel(Mine.remaningMines + "");
        mineCounter.setBackground(new Color(192, 192, 192));
        mineCounter.setForeground(Color.red);
        mineCounter.setFont(technology);
        topMenu.add(mineCounter);
 
        topMenu.add(Box.createRigidArea(new Dimension(390, 0)));
 
        btnNewButton = new JButton();
        btnNewButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                GamePanel.newGame();
            }
        });
 
        String iconfilePath = this.getClass().getClassLoader().getResource("Images/Defualt.png").getFile();
        btnNewButton.setIcon(new ImageIcon(iconfilePath));
        btnNewButton.setBorder(BorderFactory.createEmptyBorder());
        btnNewButton.setContentAreaFilled(false);
        btnNewButton.setFocusable(false);
        topMenu.add(btnNewButton);
 
        topMenu.add(Box.createRigidArea(new Dimension(390, 0)));
 
        timer = new JLabel(GamePanel.time + "00");
        timer.setBackground(new Color(192, 192, 192));
        timer.setForeground(Color.red);
        timer.setFont(technology);
        topMenu.add(timer);
        screen.add(topMenu, BorderLayout.NORTH);
 
    }
 
    public void changeIcon(String imagePath) {
        String iconfilePath = this.getClass().getClassLoader().getResource(imagePath).getFile();
        btnNewButton.setIcon(new ImageIcon(iconfilePath));
 
    }
 
}

program breaks when

Please copy the full text of the error message and paste it here. It has important info about the error.

There are missing classes and no main method -> the code can not be compiled and executed for testing.

Please make and post a small, complete program that compiles and executes for testing.

Have you tried asking with Google? Here is one link I got: https://java-demos.blogspot.com/2012...in-jframe.html

Can you post the working code here for others to see?