Java實現Windows、Mouse監聽器
阿新 • • 發佈：2019-01-02
1、通過實現WindowListener介面來實現Windows監聽器：
1 import java.awt.event.WindowEvent; 2 import java.awt.event.WindowListener; 3 4 import javax.swing.JFrame; 5 6 public class WindowsListenerFrame extends JFrame implements WindowListener { 7 8 public WindowsListenerFrame() { 9 this.setTitle("窗體事件"); 10 setSize(600, 400); 11 setResizable(false); 12 setLocationRelativeTo(null); 13 14 this.addWindowListener(this); 15 } 16 17 public static void main(String[] args) { 18 JFrame frame = new WindowsListenerFrame(); 19 frame.setVisible(true); 20 } 21 22 @Override 23 public void windowActivated(WindowEvent event) { 24 } 25 26 @Override 27 public void windowClosed(WindowEvent arg0) { 28 } 29 30 @Override 31 public void windowClosing(WindowEvent arg0) { 32 this.dispose(); 33 } 34 35 @Override36 public void windowDeactivated(WindowEvent arg0) { 37 } 38 39 @Override 40 public void windowDeiconified(WindowEvent arg0) { 41 } 42 43 @Override 44 public void windowIconified(WindowEvent arg0) { 45 } 46 47 @Override 48 public void windowOpened(WindowEvent arg0) { 49 } 50 }
2、通過實現WindowAdapter介面來實現Windows監聽器：
1 import java.awt.event.WindowAdapter; 2 import java.awt.event.WindowEvent; 3 import java.awt.event.WindowListener; 4 import javax.swing.JFrame; 5 6 public class WindowAdapterFrame extends JFrame{ 7 public WindowAdapterFrame() { 8 setTitle("窗體介面卡"); 9 setSize(600, 400); 10 setResizable(false); 11 12 WindowListener listener =new WindowAdapter() { 13 @Override 14 public void windowClosing(WindowEvent e) { 15 dispose(); 16 } 17 }; 18 this.addWindowListener(listener); 19 } 20 public static void main(String[] args) { 21 JFrame frame=new WindowAdapterFrame(); 22 frame.setVisible(true); 23 } 24 }
3、通過實現MouseListener、MouseMotionListener介面來實現Mouse監聽器：
1 import java.awt.BorderLayout; 2 import java.awt.Container; 3 import java.awt.event.MouseEvent; 4 import java.awt.event.MouseListener; 5 import java.awt.event.MouseMotionListener; 6 7 import javax.swing.JFrame; 8 import javax.swing.JLabel; 9 10 public class MouseListenerFrame extends JFrame implements MouseListener, MouseMotionListener{ 11 JLabel lblStatus=null; 12 public MouseListenerFrame() { 13 setTitle("MouseListener"); 14 setSize(600, 400); 15 setDefaultCloseOperation(EXIT_ON_CLOSE); 16 setResizable(false); 17 18 Container container =this.getContentPane(); 19 lblStatus=new JLabel(); 20 container.add(BorderLayout.SOUTH, lblStatus); 21 22 container.addMouseListener(this); 23 container.addMouseMotionListener(this); 24 } 25 /** 26 * 值得注意的是String.format()方法的呼叫格式，是用","來隔開各個引數 27 */ 28 @Override 29 public void mouseClicked(MouseEvent event) { 30 String msg=String.format("滑鼠點選[%d, %d]",event.getX(),event.getY()); 31 lblStatus.setText(msg); 32 } 33 @Override 34 public void mousePressed(MouseEvent e) { 35 String button=null; 36 if(MouseEvent.BUTTON1==e.getButton()) { 37 button="左鍵"; 38 }else if(MouseEvent.BUTTON2==e.getButton()) { 39 button="滾輪"; 40 }else if(MouseEvent.BUTTON3==e.getButton()) { 41 button="右鍵"; 42 } 43 String msg=String.format("滑鼠 %s 按下[%d,%d]",button,e.getX(),e.getY()); 44 lblStatus.setText(msg); 45 } 46 @Override 47 public void mouseReleased(MouseEvent e) { 48 String msg=String.format("滑鼠釋放[%d,%d]",e.getX(),e.getY()); 49 lblStatus.setText(msg); 50 } 51 @Override 52 public void mouseEntered(MouseEvent e) { 53 String msg=String.format("滑鼠進入[%d,%d]",e.getX(),e.getY()); 54 lblStatus.setText(msg); 55 } 56 @Override 57 public void mouseExited(MouseEvent e) { 58 String msg=String.format("滑鼠退出[%d,%d]",e.getX(),e.getY()); 59 lblStatus.setText(msg); 60 } 61 @Override 62 public void mouseDragged(MouseEvent e) { 63 String msg=String.format("滑鼠拖動，當前座標 [%d,%d]",e.getX(),e.getY()); 64 lblStatus.setText(msg); 65 } 66 @Override 67 public void mouseMoved(MouseEvent e) { 68 String msg=String.format("滑鼠移動，當前座標 [%d,%d]",e.getX(),e.getY()); 69 lblStatus.setText(msg); 70 } 71 public static void main(String[] args) { 72 JFrame frame=new MouseListenerFrame(); 73 frame.setVisible(true); 74 } 75 }
4、通過實現KeyListener介面來實現Key監聽器：
1 import java.awt.BorderLayout; 2 import java.awt.Container; 3 import java.awt.event.KeyEvent; 4 import java.awt.event.KeyListener; 5 6 import javax.swing.JFrame; 7 import javax.swing.JLabel; 8 import javax.swing.JTextArea; 9 10 public class KeyListenerFrame extends JFrame implements KeyListener { 11 // 1. 屬性 12 JLabel lblStatus = null; 13 14 // 2. 方法 15 public KeyListenerFrame() { 16 this.setTitle("滑鼠事件"); 17 setSize(600, 400); 18 setResizable(false); 19 setLocationRelativeTo(null); 20 setDefaultCloseOperation(EXIT_ON_CLOSE); 21 22 Container contentPane = this.getContentPane(); 23 24 lblStatus = new JLabel(); 25 contentPane.add(BorderLayout.SOUTH, lblStatus); 26 27 JTextArea txaEdit = new JTextArea(); 28 contentPane.add(BorderLayout.CENTER, txaEdit); 29 30 txaEdit.addKeyListener(this); 31 } 32 33 public static void main(String[] args) { 34 JFrame frame = new KeyListenerFrame(); 35 frame.setVisible(true); 36 } 37 38 @Override 39 public void keyPressed(KeyEvent event) { 40 lblStatus.setText("鍵盤按下: " + event.getKeyChar() + "(" + event.getKeyCode() + ")"); 41 } 42 43 @Override 44 public void keyReleased(KeyEvent event) { 45 lblStatus.setText("鍵盤放開: " + event.getKeyChar() + "(" + event.getKeyCode() + ")"); 46 } 47 48 @Override 49 public void keyTyped(KeyEvent event) { 50 lblStatus.setText("鍵盤敲擊: " + event.getKeyChar() + "(" + event.getKeyCode() + ")"); 51 } 52 }