Java：Button没有显示出来

Question

所以，我正在使用Java和JFrame，我希望最终用户能够点击“登录”按钮，它应该显示另一个说“编辑”。由于某些奇怪的原因，当最终用户点击“登录”时，它没有显示“编辑”框，但它显示“System.out.println”

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class Main extends  JFrame{

    public void fixtureList()
    {
        JButton editButton;

        editButton = new JButton("Edit");
        editButton.setBounds(100, 200, 100, 100);
        add(editButton);

    }

    public void loginPanel()
    {
        setLayout(null);

        JButton loginButton;

        loginButton = new JButton("Login");
        loginButton.setBounds(10, 10, 100, 100);
        add(loginButton);
        loginButton.addActionListener(new ActionListener()
        {

            public void actionPerformed(ActionEvent e)
            {
                //Execute when button is pressed
                fixtureList();
                System.out.println("Loading the fixtures screen");
            }

        });

    }

    public static void main(String[] args)
    {

        Main window = new Main();

        window.setTitle("PE Fixtures v1.0");
        window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        window.setSize(250, 430);
        window.loginPanel();
        window.getContentPane().setBackground(new Color(53, 56, 64));
        window.setVisible(true);


    }
}

Answer 1

在repaint

中致电ActionListener

    public void actionPerformed(ActionEvent e)
    {
        //Execute when button is pressed
        fixtureList();
        System.out.println("Loading the fixtures screen");
        repaint();
    }