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();

    }



}