day22/MouseAndKey1.java

/*鼠标和键盘事件鼠标和键盘在 component 中查找*/import java.awt.*;import java.awt.event.*;class MouseAndKey1 {private Frame f;private Button b;private TextField tf ;//文本框MouseAndKey1(){init();}public void init(){f=new Frame("my frame");f.setBounds(200,100,500,400);f.setLayout(new FlowLayout());b=new Button("button");f.add(b);tf = new TextField();tf.setColumns(10);//设置文本框的列数f.add(tf);myEvent();f.setVisible(true);}private void myEvent(){f.addWindowListener(new WindowAdapter(){public void windowClosing(WindowEvent e){System.exit(0);}});//键盘监听按钮b.addKeyListener(new KeyAdapter(){public void keyPressed(KeyEvent e){//System.out.println(e.getKeyChar()+"..."+e.getKeyCode());System.out.println(KeyEvent.getKeyText(e.getKeyCode())+"..."+e.getKeyCode());//if(e.getKeyCode()==KeyEvent.VK_ENTER)//按下回车键就退出//System.exit(0);if(e.isControlDown()&&e.getKeyCode()==KeyEvent.VK_ENTER)//按下ctrl+enter的组合键System.out.println("ctrl+enter run");}});//键盘监听文本框tf.addKeyListener(new KeyAdapter(){public void keyPressed(KeyEvent e){if(!(e.getKeyCode()>KeyEvent.VK_0&&e.getKeyCode()<KeyEvent.VK_9)){System.out.println(e.getKeyCode()+"...是非法的");e.consume();//不让写进文本框}}});}public static void main(String[] args) {new MouseAndKey1();}}