GUI_键盘事件

import java.awt.Button;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.TextField;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;

public class MouseAndKeyDemo {

    
    private Frame f;
    private TextField tf;
    private Button but;
    
    public MouseAndKeyDemo() {
        init();
        
    }


    private void init() {
        
        f = new Frame("演示鼠标和键盘监听");
        f.setBounds(400,200,500,400);
        f.setLayout(new FlowLayout());
        
        tf = new TextField(35);
        but = new Button("一个按钮");
        
        f.add(tf);
        f.add(but);
        
        
        myEvent();
        
        
        f.setVisible(true);
        
    }


    private void myEvent() {
        
        //给文本框添加键盘监听。
        tf.addKeyListener(new KeyAdapter() {

            @Override
            public void keyPressed(KeyEvent e) {
                
//                System.out.println("key run..."+KeyEvent.getKeyText(e.getKeyCode())+"::::"+e.getKeyCode());
//                int code = e.getKeyCode();
//                if(!(code>=KeyEvent.VK_0 && code<=KeyEvent.VK_9)){
//                    System.out.println("必须是数字");
//                    e.consume();
//                }
                
                if(e.isControlDown() && e.getKeyCode()==KeyEvent.VK_ENTER){
                    System.out.println("enter run ...");
                }
            }
            
        });
        
        
    }
        
    public static void main(String[] args) {

        new MouseAndKeyDemo();
    }

}