import java.awt.*;
import java.awt.event.*;

public class Draw1 {
    public static void main(String[] args) {
        DrawMachine dm = new DrawMachine();
    }
}

class DrawMachine extends Frame implements Runnable, ActionListener {
    Button btn1, btn2;
    TextField tf;
    Thread trd1;
    boolean Flag;

    public DrawMachine() {
        super("抽奖机");
        setVisible(true);
        setSize(300, 200);
        setBackground(Color.cyan);
        setLayout(null);
        btn1 = new Button("开始");
        btn2 = new Button("停止");
        tf = new TextField(100);
        add(btn1);
        add(btn2);
        add(tf);
        btn1.setBounds(90, 130, 50, 30);
        btn2.setBounds(150, 130, 50, 30);
        tf.setBounds(60, 80, 170, 30);
        
        btn1.addActionListener(this);
        btn2.addActionListener(this);
        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }

    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == btn1) {
            trd1 = new Thread(this);
            Flag = true;
            trd1.start();
            btn1.setEnabled(false);
        }
        if (e.getSource() == btn2) {
            setFlag();
            btn1.setEnabled(true);
        }
    }

    public void run() {
        while (Flag) {
            for (int i = 1; i < 11; i++) {
                tf.setText("" + i);
                if (Flag == false) {
                    break;
                }
            }
        }
    }

    public void setFlag() {
        Flag = false;
    }    
}