Question

以下是我使用的代码，但没有我正在使用netbeans ;

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
    new NewJFrame().setVisible(true);       // to open a new frame
    Menu.setVisible(false);  //not working
    Menu.dispose();// not working
    Menu().setVisible(false); //not working
    new Menu().setVisible(true); // this don't give me error but nothing happens if I press the button only open the new frame
    // I tried all of these with "this." but nothing
}

Answer 1

适合我的工作

public class ParentFrame extends JFrame {

    private JButton btnBirth;

    public ParentFrame() {

        setTitle("Parent");
        setDefaultCloseOperation(DISPOSE_ON_CLOSE);

        setLayout(new GridBagLayout());

        setSize(200, 200);
        setLocationByPlatform(true);

        btnBirth = new JButton("Spawn");
        btnBirth.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {

                setVisible(false);
                ChildFrame child = new ChildFrame(ParentFrame.this);
                child.setVisible(true);

            }

        });

        add(btnBirth);

    }

}

public class ChildFrame extends JFrame {

    private JLabel lblGoo;
    private JFrame parent;

    public ChildFrame(JFrame parent) {

        this.parent = parent;

        setTitle("Child");
        setDefaultCloseOperation(DISPOSE_ON_CLOSE);
        setLayout(new GridBagLayout());

        setSize(100, 100);
        setLocationByPlatform(true);

        lblGoo = new JLabel("Goo");
        add(lblGoo);

        addWindowListener(new WindowAdapter() {

            @Override
            public void windowClosing(WindowEvent e) {

                ChildFrame.this.parent.setVisible(true);

            }

        });

    }

}

使用Netbeans表单编辑器

更新

public class ParentFrame extends javax.swing.JFrame {

    /**
     * Creates new form ParentFrame
     */
    public ParentFrame() {

        initComponents();

        setSize(200, 200);

    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
  // <editor-fold defaultstate="collapsed" desc="Generated Code">
  private void initComponents() {

    jButton1 = new javax.swing.JButton();

    setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE);
    setTitle("Parent");
    setLocationByPlatform(true);
    setPreferredSize(new java.awt.Dimension(200, 200));
    getContentPane().setLayout(new java.awt.GridBagLayout());

    jButton1.setText("Spawn");
    jButton1.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(java.awt.event.ActionEvent evt) {
        jButton1ActionPerformed(evt);
      }
    });
    getContentPane().add(jButton1, new java.awt.GridBagConstraints());

    pack();
  }// </editor-fold>

  private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {

        setVisible(false);
        new ChildFrame(this).setVisible(true);

  }

  // Variables declaration - do not modify
  private javax.swing.JButton jButton1;
  // End of variables declaration
}


public class ChildFrame extends javax.swing.JFrame {

private JFrame parentFrame;

/**
 * Creates new form ChildFrame
 */
public ChildFrame() {

    initComponents();

    setSize(100, 100);

}

public ChildFrame(JFrame frame) {

    this();

    parentFrame = frame;

}

/**
 * This method is called from within the constructor to initialize the form.
 * WARNING: Do NOT modify this code. The content of this method is always
 * regenerated by the Form Editor.
 */
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {

jLabel1 = new javax.swing.JLabel();

setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE);
setTitle("Child");
setLocationByPlatform(true);
setPreferredSize(new java.awt.Dimension(100, 100));
addWindowListener(new java.awt.event.WindowAdapter() {
  public void windowClosing(java.awt.event.WindowEvent evt) {
    doWindowClosing(evt);
  }
});
getContentPane().setLayout(new java.awt.GridBagLayout());

jLabel1.setText("Goo");
getContentPane().add(jLabel1, new java.awt.GridBagConstraints());

pack();
}// </editor-fold>

private void doWindowClosing(java.awt.event.WindowEvent evt) {                                 

    setVisible(false);
    parentFrame.setVisible(true);

}                                

// Variables declaration - do not modify
private javax.swing.JLabel jLabel1;
// End of variables declaration
}

打开一个新框架并关闭自己的框架

1 个答案: