MouseAdapter 類

介紹

MouseAdapter的類是一個抽象類（適配器）用於接收鼠標事件。這個類的所有方法都是空的。這個類是方便的類創建偵聽器對象。

類聲明

以下是java.awt.event.MouseAdapter類聲明：

public abstract class MouseAdapter extends Object implements MouseListener, MouseWheelListener, MouseMotionListener

類的構造函數

S.N.

構造函數＆說明

MouseAdapter()

類方法

S.N.

方法＆說明

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

void mouseDragged(MouseEvent e)
Invoked when a mouse button is pressed on a component and then dragged.

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

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

void mouseMoved(MouseEvent e)
Invoked when the mouse cursor has been moved onto a component but no buttons have been pushed.

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.

void mouseWheelMoved(MouseWheelEvent e)
Invoked when the mouse wheel is rotated.

繼承的方法

這個類繼承的方法從以下類：

java.lang.Object

MouseAdapter 實例

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

AwtAdapterDemo

package com.yiibai.gui; import java.awt.*; import java.awt.event.*; public class AwtAdapterDemo { private Frame mainFrame; private Label headerLabel; private Label statusLabel; private Panel controlPanel; public AwtAdapterDemo(){ prepareGUI(); } public static void main(String[] args){ AwtAdapterDemo awtAdapterDemo = new AwtAdapterDemo(); awtAdapterDemo.showMouseAdapterDemo(); } 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 showMouseAdapterDemo(){ headerLabel.setText("Listener in action: MouseAdapter"); Panel panel = new Panel(); panel.setBackground(Color.magenta); panel.setLayout(new FlowLayout()); panel.addMouseListener(new MouseAdapter(){ public void mouseClicked(MouseEvent e) { statusLabel.setText("Mouse Clicked: (" +e.getX()+", "+e.getY() +")"); } }); Label msglabel = new Label(); msglabel.setAlignment(Label.CENTER); msglabel.setText("Welcome to TutorialsPoint AWT Tutorial."); msglabel.addMouseListener(new MouseAdapter(){ public void mouseClicked(MouseEvent e) { statusLabel.setText("Mouse Clicked: (" +e.getX()+", "+e.getY() +")"); } }); panel.add(msglabel); controlPanel.add(panel); mainFrame.setVisible(true); } }

編譯程序，使用命令提示符。進入到D:/> AWT，然後鍵入以下命令。

D:AWT>javac comyiibaiguiAwtAdapterDemo.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.AwtAdapterDemo

驗證下面的輸出

AWT