import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Example10_7 {
    public static void main(String[] args) {

        MyWindow win = new MyWindow();

    }
}

class MyWindow extends JFrame {
    JTextField text;
    Polices police;

    MyWindow() {
        setLayout(new FlowLayout());
        text = new JTextField(15);
        add(text);
        police = new Polices(text);
        text.addActionListener(police);
        setBounds(300, 400, 200, 150);
        setVisible(true);
        validate();
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    
}

class Polices implements ActionListener {
    JTextField t;
    public Polices(JTextField textfield) {
        t = textfield;
    }
    
    public void actionPerformed(ActionEvent e) {
        String str = e.getActionCommand();
        System.out.println(str);
        System.out.println(str.length());
        t.setText("");
    }
}