使用代码关闭java框架

Question

可能的重复：
如何以编程方式关闭 JFrame

我正在使用 JFrame 开发 java GUI。我想关闭 GUI 框架并通过代码将其处理掉。 我已经实现：

topFrame.addWindowListener(new WindowListener()
        {
            public void windowClosing(WindowEvent e)
            {
                emsClient.close();
            }
            public void windowOpened(WindowEvent e) {
            }
            public void windowClosed(WindowEvent e) {
            }
            public void windowIconified(WindowEvent e) {
            }
            public void windowDeiconified(WindowEvent e) {
            }
            public void windowActivated(WindowEvent e) {
            }
            public void windowDeactivated(WindowEvent e) {
            }
        });`

如何调用 windowClosing 事件？或者还有其他办法吗？

Answer 1

这将以编程方式触发窗口关闭事件：

topFrame.dispatchEvent(new WindowEvent(topFrame, WindowEvent.WINDOW_CLOSING));

如果你想关闭框架，你需要调用：

topFrame.dispose();

Answer 2

调用 dispose() 方法怎么样？

Answer 3

你需要这个：

yourFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

你可以在构造函数中添加该行（不要忘记它）。

Answer 4

import java.awt.event.*;
import javax.swing.*;

class CloseFrame {

    public static void main(String[] args) {

        Runnable r = new Runnable() {

            public void run() {
                JButton close = new JButton("Close me programmatically");
                final JFrame f = new JFrame("Close Me");
                f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                f.setContentPane( close );
                close.addActionListener( new ActionListener(){
                    public void actionPerformed(ActionEvent ae) {
                        // make the app. end (programatically)
                        f.dispose();
                    }
                } );
                f.pack();
                f.setLocationByPlatform(true);
                f.setVisible(true);
            }
        };

        SwingUtilities.invokeLater(r);
    }
}