Swing WindowListener接口
WindowEvent 類的對象必須實現這個接口。類處理一個組件必須註冊。使用addWindowListener()方法，該對象可以被註冊。
接口聲明
以下是聲明 java.awt.event.WindowListener接口：
public interface WindowListener extends EventListener
接口方法
S.N.
方法 & 描述
1
void windowActivated(WindowEvent e)
Invoked when the Window is set to be the active Window.
2
void windowClosed(WindowEvent e)
Invoked when a window has been closed as the result of calling dispose on the window.
3
void windowClosing(WindowEvent e)
Invoked when the user attempts to close the window from the window's system menu.
4
void windowDeactivated(WindowEvent e)
Invoked when a Window is no longer the active Window.
5
void windowDeiconified(WindowEvent e)
Invoked when a window is changed from a minimized to a normal state.
6
void windowIconified(WindowEvent e)
Invoked when a window is changed from a normal to a minimized state.
7
void windowOpened(WindowEvent e)
Invoked the first time a window is made visible.
方法繼承
這個接口從以下接口繼承的方法：
- java.awt.EventListener
WindowListener 例子
選擇使用任何編輯器創建以下java程序在 D:/ > SWING > com > yiibai > gui >
SwingListenerDemo.java
package com.yiibai.gui; import java.awt.*; import java.awt.event.*; import javax.swing.*; public class SwingListenerDemo { private JFrame mainFrame; private JLabel headerLabel; private JLabel statusLabel; private JPanel controlPanel; public SwingListenerDemo(){ prepareGUI(); } public static void main(String[] args){ SwingListenerDemo swingListenerDemo = new SwingListenerDemo(); swingListenerDemo.showWindowListenerDemo(); } private void prepareGUI(){ mainFrame = new JFrame("Java SWING Examples"); mainFrame.setSize(400,400); mainFrame.setLayout(new GridLayout(3, 1)); headerLabel = new JLabel("",JLabel.CENTER ); statusLabel = new JLabel("",JLabel.CENTER); statusLabel.setSize(350,100); mainFrame.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent windowEvent){ System.exit(0); } }); controlPanel = new JPanel(); controlPanel.setLayout(new FlowLayout()); mainFrame.add(headerLabel); mainFrame.add(controlPanel); mainFrame.add(statusLabel); mainFrame.setVisible(true); } private void showWindowListenerDemo(){ headerLabel.setText("Listener in action: WindowListener"); JButton okButton = new JButton("OK"); aboutFrame = new JFrame(); aboutFrame.setSize(300,200);; aboutFrame.setTitle("WindowListener Demo"); aboutFrame.addWindowListener(new CustomWindowListener()); JPanel panel = new JPanel(); panel.setBackground(Color.white); JLabel msglabel = new JLabel("Welcome to TutorialsPoint SWING Tutorial." ,JLabel.CENTER); panel.add(msglabel); aboutFrame.add(panel); aboutFrame.setVisible(true); } class CustomWindowListener implements WindowListener { public void windowOpened(WindowEvent e) { } public void windowClosing(WindowEvent e) { aboutFrame.dispose(); } 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) { } } }
編譯程序，使用命令提示符。到 D:/ > SWING 然後輸出以下命令。
D:SWING>javac comyiibaiguiSwingListenerDemo.java
如果沒有錯誤出現，這意味着編譯成功。使用下面的命令來運行程序。
D:SWING>java com.yiibai.gui.SwingListenerDemo
驗證下面的輸出
