MouseListener 接口

MouseEvent類的對象應該實現這個接口。組件註冊。使用addMouseListener（）方法，該對象可以被註冊。

接口聲明

以下是聲明的java.awt.event.MouseListener接口：

public interface MouseListener extends EventListener

接口中的方法

S.N.

Method & Description

void mouseClicked(MouseEvent e)
Invoked when the mouse button has been clicked (pressed and released) on a component.

void mouseEntered(MouseEvent e)
Invoked when the mouse enters a component.

void mouseExited(MouseEvent e)
Invoked when the mouse exits a component.

void mousePressed(MouseEvent e)
Invoked when a mouse button has been pressed on a component.

void mouseReleased(MouseEvent e)
Invoked when a mouse button has been released on a component.

繼承的方法

這個接口繼承的方法從下面的接口：

java.awt.EventListener

MouseListener的示例

選擇使用任何編輯器創建以下java程序D:/ > AWT > com > yiibai > gui >

AwtListenerDemo

package com.yiibai.gui; import java.awt.*; import java.awt.event.*; public class AwtListenerDemo { private Frame mainFrame; private Label headerLabel; private Label statusLabel; private Panel controlPanel; public AwtListenerDemo(){ prepareGUI(); } public static void main(String[] args){ AwtListenerDemo awtListenerDemo = new AwtListenerDemo(); awtListenerDemo.showMouseListenerDemo(); } private void prepareGUI(){ mainFrame = new Frame("Java AWT Examples"); mainFrame.setSize(400,400); mainFrame.setLayout(new GridLayout(3, 1)); mainFrame.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent windowEvent){ System.exit(0); } }); headerLabel = new Label(); headerLabel.setAlignment(Label.CENTER); statusLabel = new Label(); statusLabel.setAlignment(Label.CENTER); statusLabel.setSize(350,100); controlPanel = new Panel(); controlPanel.setLayout(new FlowLayout()); mainFrame.add(headerLabel); mainFrame.add(controlPanel); mainFrame.add(statusLabel); mainFrame.setVisible(true); } private void showMouseListenerDemo(){ headerLabel.setText("Listener in action: MouseListener"); Panel panel = new Panel(); panel.setBackground(Color.magenta); panel.setLayout(new FlowLayout()); panel.addMouseListener(new CustomMouseListener()); Label msglabel = new Label(); msglabel.setAlignment(Label.CENTER); msglabel.setText("Welcome to TutorialsPoint AWT Tutorial."); msglabel.addMouseListener(new CustomMouseListener()); panel.add(msglabel); controlPanel.add(panel); mainFrame.setVisible(true); } class CustomMouseListener implements MouseListener{ public void mouseClicked(MouseEvent e) { statusLabel.setText("Mouse Clicked: (" +e.getX()+", "+e.getY() +")"); } public void mousePressed(MouseEvent e) { } public void mouseReleased(MouseEvent e) { } public void mouseEntered(MouseEvent e) { } public void mouseExited(MouseEvent e) { } } }

編譯程序，使用命令提示符。到D:/ > AWT 然後鍵入以下命令。

D:AWT>javac comyiibaiguiAwtListenerDemo.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:AWT>java com.yiibai.gui.AwtListenerDemo

驗證下面的輸出

AWT