java Swing 上的 setVisible(true) 不起作用

Question

我正在使用 Java Swing进行一个“构建播客板表单”的项目。 我在同一个 package 中创建了多个“应用程序窗口”，但是为了在我单击按钮时打开一个框架，它不起作用。 我用过setVisible(true) 。 这是我的代码的一部分：

import java.awt.EventQueue;

public class Acceuil_After {

private JFrame Acceuil_After;
private JTextField textField2;

/**
 * Launch the application.
 */
public static void main(String[] args) {
    EventQueue.invokeLater(new Runnable() {
        public void run() {
            try {
                Acceuil_After window = new Acceuil_After();
                window.Acceuil_After.setVisible(true);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    });
}

/**
 * Create the application.
 */
public Acceuil_After() {
    initialize();
}

/**
 * Initialize the contents of the frame.
 */
private void initialize() {
.........
//----JButton -----------------------------------------------------------------------------         
    JButton B_Acceuil_After1 = new JButton("Acceuil");
    B_Acceuil_After1.addMouseListener(new MouseAdapter() {
        @Override
        public void mouseClicked(MouseEvent e) {
            Acceuil_After after = new Acceuil_After();
            after.setVisible(true);
        }
    });
    B_Acceuil_After1.setBackground(new Color(77, 77, 77));
    B_Acceuil_After1.setForeground(new Color(250, 234, 115));
    B_Acceuil_After1.setFont(new Font("Century", Font.PLAIN, 17));
    B_Acceuil_After1.setBorderPainted(false);
    
    JButton podcast1 = new JButton("Nos podcasts");
    podcast1.addMouseListener(new MouseAdapter() {
        @Override
        public void mouseClicked(MouseEvent e) {
            Acceuil_After after = new Acceuil_After();
            after.setVisible(true);
        }
    });
    podcast1.setBackground(new Color(77, 77, 77));
    podcast1.setFont(new Font("Century", Font.PLAIN, 17));
    podcast1.setForeground(new Color(250, 234, 115));
    podcast1.setBorderPainted(false);
    
    JButton guide1 = new JButton("Guide d'écoute");
    guide1.addMouseListener(new MouseAdapter() {
        @Override
        public void mouseClicked(MouseEvent e) {
            Acceuil_After after = new Acceuil_After();
            after.setVisible(true);
        }
    });
    guide1.setBackground(new Color(77, 77, 77));
    guide1.setFont(new Font("Century", Font.PLAIN, 17));
    guide1.setForeground(new Color(250, 234, 115));
    guide1.setBorderPainted(false);
    
    JButton B_inscrit11 = new JButton("S'inscrire");
    B_inscrit11.addMouseListener(new MouseAdapter() {
        @Override
        public void mouseClicked(MouseEvent e) {
            Acceuil_After after = new Acceuil_After();
            after.setVisible(true);
        }
    });
    B_inscrit11.setForeground(new Color(77, 77, 77));
    B_inscrit11.setFont(new Font("Arial", Font.PLAIN, 17));
    B_inscrit11.setBackground(new Color(250, 234, 115));
    B_inscrit11.setBorderPainted(false);
   /* .............
    ............. */
        public void setVisible(boolean b) {
    // TODO Auto-generated method stub
}
}

我曾尝试使用addActionListener而不是addMouseListener但没有区别。

您好，谢谢您的回答。我已经修改了我的代码“我使用了 -class'- 而不是 -Application Window”。 -> 现在出现的问题是，除了没有我输入的任何化合物的空 window 之外，没有显示任何内容。这是我的新代码

    public class Acceuil implements ActionListener{
    JFrame acceuil = new JFrame();
    
    JButton inscrire = new JButton("S'inscrire");
    JButton connecter = new JButton("Se connecter");
    JButton subscribe = new JButton("S'inscrire");
    JButton B_acc = new JButton("Acceuil");
    JButton B_pod = new JButton("Nos podcasts");
    JButton B_gui = new JButton("Guide d'écoute");
    
    JLabel lblNewLabel = new JLabel("COGITO");
    
    JTextArea textt = new JTextArea();
    JTextField textFieldd = new JTextField();


Acceuil()
{
//---JFrame ------------------------------------------------------
    acceuil.getContentPane().setBackground(new Color(77, 77, 77));
    acceuil.setTitle("Acceuil");
    acceuil.setVisible(true);
    acceuil.setLayout(null);
    acceuil.setBounds(100, 100, 1297, 842);
    acceuil.setSize(2000, 5000);
    acceuil.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    
    acceuil.add(B_acc);
    acceuil.add(B_gui);
    acceuil.add(B_pod);
    acceuil.add(acceuil);
    acceuil.add(connecter);
    acceuil.add(inscrire);
    acceuil.add(lblNewLabel);
    acceuil.add(subscribe);
    acceuil.add(textFieldd);
    acceuil.add(textt);

//----JButton ----------------------------------------------------
    inscrire.setBackground(new Color(250, 234, 115));
    inscrire.setForeground(Color.WHITE);
    inscrire.setFont(new Font("Century", Font.PLAIN, 21));
    inscrire.addActionListener(this);
    
    
    connecter.setFont(new Font("Century", Font.PLAIN, 21));
    connecter.setForeground(new Color(255, 255, 255));
    connecter.setBackground(new Color(250, 234, 115));
    connecter.addActionListener(this);
    
    subscribe.setForeground(new Color(77, 77, 77));
    subscribe.setFont(new Font("Arial", Font.PLAIN, 17));
    subscribe.setBackground(new Color(250, 234, 115));
    subscribe.setBorderPainted(false);
    subscribe.addActionListener(this);
    
    B_acc.setFont(new Font("Century", Font.PLAIN, 17));
    B_acc.setForeground(new Color(250, 234, 115));
    B_acc.setBackground(new Color(77, 77, 77));
    B_acc.setBorderPainted(false);
    B_acc.addActionListener(this);
    
    B_pod.setFont(new Font("Century", Font.PLAIN, 17));
    B_pod.setForeground(new Color(250, 234, 115));
    B_pod.setBackground(new Color(77, 77, 77));
    B_pod.setBorderPainted(false);
    B_pod.addActionListener(this);
    
    B_gui.setForeground(new Color(250, 234, 115));
    B_gui.setBackground(new Color(77, 77, 77));
    B_gui.setFont(new Font("Century", Font.PLAIN, 17));
    B_gui.setBorderPainted(false);
    B_gui.addActionListener(this);
//----JLabel ------------------------------------------------------
    lblNewLabel.setFont(new Font("Century", Font.BOLD, 70));
    lblNewLabel.setForeground(new Color(250, 234, 115));
    lblNewLabel.setBackground(new Color(77, 77, 77));
    

    
//----JTextArea -------------------------------------------------
    textt.setFont(new Font("Century", Font.PLAIN, 21));
    textt.setForeground(Color.WHITE);
    textt.setBackground(new Color(77, 77, 77));
    textt.setText("Votre aventure philosophique et littéraire");
    textt.setTabSize(20);
    
//----JTextField ------------------------------------------------
    textFieldd.setText("Titres des podcasts de la semaine");
    textFieldd.setForeground(Color.WHITE);
    textFieldd.setBackground(new Color(77, 77, 77));
    textFieldd.setFont(new Font("Century", Font.PLAIN, 21));
    textFieldd.setColumns(10);
    textFieldd.setBorder(null);
    
}


@Override
public void actionPerformed(ActionEvent e) {
    if(e.getSource() == inscrire)
    {
        acceuil.dispose();
        Inscription inscriptionn = new Inscription();
    }
    if(e.getSource() == connecter)
    {
        acceuil.dispose();
        Connexion guide = new Connexion();
    }
    if(e.getSource() == subscribe)
    {
        acceuil.dispose();
        Inscription inscription = new Inscription();
    }
    if(e.getSource() == B_pod)
    {
        acceuil.dispose();
        Inscription podcasts = new Inscription();
    }
    if(e.getSource() == B_gui)
    {
        acceuil.dispose();
        Guide guide = new Guide();
    }
}

}

Answer 1

我要感谢所有回答和帮助我的人。 最后，我解决了我遇到的问题。 这是我的新代码的一部分：

public class Acceuil  implements ActionListener{
    JFrame acceuil = new JFrame();
    
    GroupLayout groupLayout = new GroupLayout(acceuil.getContentPane());
   /* **************************************************************** */

   Acceuil()
   {
    //---JFrame ----------------------------------------------------------
    acceuil.getContentPane().setBackground(new Color(77, 77, 77));
    acceuil.setTitle("Acceuil");
    acceuil.setVisible(true);
    acceuil.getContentPane().setLayout(groupLayout);
    acceuil.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);     
    
    acceuil.add(inscrire);
    acceuil.add(lblNewLabel);
    //.........................................
    
    //----Grouplayout ----------------------------------------------------
    
    groupLayout.setHorizontalGroup(
            groupLayout.createParallelGroup(Alignment.LEADING)
                .addGroup(groupLayout.createSequentialGroup()
                    .addGap(72)
                    .addComponent(inscrire, GroupLayout.PREFERRED_SIZE, 
        158, GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(ComponentPlacement.RELATED, 742, 
      Short.MAX_VALUE)
     //**********************************************************
        );
    
      groupLayout.setVerticalGroup(
            groupLayout.createParallelGroup(Alignment.LEADING)
                .addGroup(groupLayout.createSequentialGroup()
                    .addGap(71)
                    
       .addGroup(groupLayout.createParallelGroup(Alignment.BASELINE)
                        .addComponent(inscrire)
                        .addComponent(connecter))
                    .addGap(32)
                    .addComponent(lblNewLabel)
                    .addGap(16)
      //***************************************************
        );
    @Override
   public void actionPerformed(ActionEvent e) {
    if(e.getSource() == inscrire)
    {
        acceuil.dispose();
        Inscription inscriptionn = new Inscription();
    }
   }}