java Swing关闭子窗口

public static void main(String[] args) throws Exception {

JFrame frame = new JFrame("swing test")

frame.setSize(300, 200)

frame.setLayout(null)

JButton btnNewFrame = new JButton("新窗口")

btnNewFrame.setBounds(30, 30, 80, 40)

frame.getContentPane().add(btnNewFrame)

frame.setVisible(true)

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)//关闭时，直接退出

btnNewFrame.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

// TODO 自动生成

final JFrame frame = new JFrame("new frame")

frame.setSize(200, 180)

frame.getContentPane().add(new JLabel("this is a new frame"))

frame.setVisible(true)

frame.addWindowListener(new WindowAdapter() {

@Override

public void windowClosed(WindowEvent e) {

// TODO 自动生成

frame.dispose()//dispose会隐藏窗体并释放窗体所占用的部分资源

}

})

}

})

}

// register.addActionListener(new AbstractAction() { 再这一行前加下面一下

  JFrame f = this

  // 里面这样写

  f.setVisible(false)

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