swing - 未添加 Swing 按钮

Question

我是 SWING 的新手。我已经编写了一个框架代码，当单击一个新框架时会打开一个按钮。但我不知道新框架/窗口不包含我在代码中添加的按钮的代码有什么问题。

setTitle("Frame1");
    setSize(250, 250);
    setDefaultCloseOperation(1);
    setVisible(true);

    JPanel panel1= new JPanel();
    getContentPane().add(panel1);
    JButton button1= new JButton();
    button1.setText("Click to open new window");
    button1.setBounds(20, 15, 14, 18);
    button1.addActionListener(new ActionListener() {

        @Override
        public void actionPerformed(ActionEvent arg0) {
            JFrame newFrame= new JFrame();
            newFrame.setBounds(150, 150, 150, 150);
            newFrame.setDefaultCloseOperation(1);
            newFrame.setTitle("New Frame");
            newFrame.setVisible(true);
            JPanel panel2= new JPanel();
            getContentPane().add(panel2);
            JButton button2= new JButton();
            button2.setText("QUIT");
            button2.setBounds(10, 5, 4, 8);
            panel2.add(button2);
            button2.addActionListener(new ActionListener() {

                @Override
                public void actionPerformed(ActionEvent arg0) {
                    System.exit(0);

                }
            });

        }
    });     
    panel1.add(button1);}

请帮忙！

Answer 1

您添加JButton button1到JPanel panel1但不添加JPanel pane1到JFrame自身。

您需要JPanel panel1将JFrame

add(panel1);