向JFrame添加新的WindowListener [英] Adding a new WindowListener to a JFrame

问题描述

    mainFrame.addWindowListener(new WindowListener() {

        @Override
        public void windowClosing(WindowEvent e) {
            if (JOptionPane.showConfirmDialog(mainFrame, "Are you sure you want to quit?", "Confirm exit.", JOptionPane.OK_OPTION, 0, new ImageIcon("")) != 0) {
                return;
            }
            System.exit(-1);
        }

        @Override 
        public void windowOpened(WindowEvent e) {}

        @Override 
        public void windowClosed(WindowEvent e) {}

        @Override 
        public void windowIconified(WindowEvent e) {}

        @Override 
        public void windowDeiconified(WindowEvent e) {}

        @Override 
        public void windowActivated(WindowEvent e) {}

        @Override 
        public void windowDeactivated(WindowEvent e) {}

    });

有我的代码，是否可能因为我只使用windowClosing方法来删除所有其他情况(无用的方法)，从而占用更少的空间?

There is my code, is it possible since I only use the windowClosing method to remove all the other in my case, useless methods so it takes less space?

示例

    mainFrame.addWindowListener(new WindowListener() {

        @Override
        public void windowClosing(WindowEvent e) {
            if (JOptionPane.showConfirmDialog(mainFrame, "Are you sure you want to quit?", "Confirm exit.", JOptionPane.OK_OPTION, 0, new ImageIcon("")) != 0) {
                return;
            }
            System.exit(-1);
        }

    });

有可能吗?

推荐答案

WindowListener的默认实现称为

There is a default implementation of WindowListener called WindowAdapter which allows you to override the methods you really want to use

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