想在子类中拥有我的菜单

Question

这是我的主要：

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

public class GUI {
public static void main(String[] args){

    JFrame cF = new JFrame("HANGMAN");
    cF.setContentPane(new Hangman());
   // cF.setSize(700, 600);
    cF.pack();
    cF.setLocationRelativeTo(null);
    cF.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    cF.setVisible(true);
   }
}

我想在这个子类中创建 JMenuBar，但是当我编译并运行时，菜单没有被创建。如何在主节点的 JFrame 上创建菜单？相当菜鸟，我不知道这是如何工作的，所以如果有人可以帮助我，那就太好了。

import javax.swing.*;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import java.io.FileReader;
public class Hangman extends JPanel {
JTextField guessesField, missField, statusField, guessField;
JPanel guessPanel, missPanel, statusPanel;
int gu = 0 ;
public Hangman(){


    setLayout(new GridLayout(4, 1, 10, 15));

    /*--Guesses Left--*/
    JPanel guessPanel = new JPanel();

    JLabel guessLabel = new JLabel("Guesses Left: " + gu);
    //JTextField guessField = new JTextField(1);
    //guessField.setEditable(false);
    //guessField.setText("");
    guessPanel.add(guessLabel);
    //guessPanel.add(guessField);

    add(guessPanel); 
    /*--Current Status---*/
    JPanel statusPanel = new JPanel();
    JLabel statusLabel = new JLabel("Current Status:");
    statusPanel.add(statusLabel);
    statusField = new JTextField(10);
    statusField.setText("_ _ _ _ _ _ _ _");
    statusField.setEditable(false);
    add(statusPanel); 
    statusPanel.add(statusField);
    /*--Guess---*/
    JPanel guessesPanel = new JPanel();
    JLabel guessesLabel = new JLabel("Guess:" );
    guessesPanel.add(guessesLabel);
    guessesField = new JTextField(1);

    guessesPanel.add(guessesField);
    add(guessesPanel); 
    /*--Misses---*/
    JPanel missPanel = new JPanel();
    JLabel missLabel = new JLabel("Misses:");
    missField = new JTextField(10);
    missField.setEditable(false);
    missField.setText("_ _ _ _ _ _ _ _");
    missPanel.add(missLabel);
    missPanel.add(missField);
    add(missPanel); 
}
    public void menubar(JFrame cF){
    /*--Menu--*/
    JMenuBar menubar = new JMenuBar();
    cF.setJMenuBar(menubar);
    JMenu start = new JMenu("Start");
    menubar.add(start);
    JMenuItem startg = new JMenuItem("Start");
    JMenuItem exit = new JMenuItem("Exit");
    start.add(startg);
    start.add(exit);
    JMenu options = new JMenu("Options");
    menubar.add(options);
    JRadioButtonMenuItem hard = new JRadioButtonMenuItem("Hard");
    JRadioButtonMenuItem medium = new JRadioButtonMenuItem("Medium");
    JRadioButtonMenuItem easy = new JRadioButtonMenuItem("Easy");
    ButtonGroup bg = new ButtonGroup();
    bg.add(hard);
    bg.add(medium);
    bg.add(easy);
    options.add(hard);
    options.add(medium);
    options.add(easy);

    /*--AllActionListeners--*/
    startg.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e) {
            System.exit(0);
        }
    });
    exit.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e) {
            System.exit(0);
        }
    });

    hard.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e) {
        }
    });
    medium.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e) {
        }
    });
    easy.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e) {
        }
    });


}

}

Answer 1

您已经创建了menubar(JFrame cF)方法，但没有在任何地方使用它。

试试这样

JFrame cF = new JFrame("HANGMAN");
Hangman h = new Hangman();
cF.setContentPane(h);
h.menubar(cF);
// cF.setSize(700, 600);
cF.pack();
cF.setLocationRelativeTo(null);
cF.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
cF.setVisible(true);