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();
    }

}