输入框TextField监听

package gui;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class TextField01 {
    public static void main(String[] args) {
        //启动
        new MyFrame();
    }
}
class MyFrame extends Frame {
    public MyFrame() {
        TextField textField = new TextField();
        add(textField);
        //监听文本框输入的文字
        MyActionListener2 myActionListener2 = new MyActionListener2();
        //按下enter 就会触发输入框事件
        textField.addActionListener(myActionListener2);
//        //设置替换编码
//        textField.setEchoChar('*');
        setVisible(true);
        pack();
    }
}
class MyActionListener2 implements ActionListener {
    @Override
    public void actionPerformed(ActionEvent e) {
        TextField textField = (TextField) e.getSource();//获得一些资源,返回一个对象
        System.out.println(textField.getText());//获得输入框中的文本
        textField.setText("");//回车后清空文本框
    }
}