package packMutil;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class Muti1 extends WindowAdapter implements ActionListener
{
	public static JFrame f = new JFrame("Welcome");
	public static MyThread mt1 = new MyThread("Welcome!");
	public static MyThread mt2 = new MyThread("How are you?");
	
	public static void main(String args[])
	{
		Muti1 ltr = new Muti1();
		ltr.dispaly();
		mt1.start();
		mt1.setButton();
		mt2.start();
		mt2.setButton();
	}
	
	public void dispaly()
	{
		f.setSize(400,240);
		f.setLocation(200,140);
		f.setBackground(Color.LIGHT_GRAY);
		f.setLayout(new GridLayout(4,1));
		f.addWindowListener(this);
		f.setVisible(true);
	}
	
	public void windowClosing(WindowEvent e)
	{
		System.exit(0);
	}
	
	public void actionPerformed(ActionEvent e)
	{
		if((e.getSource()==mt1.aButton)||(e.getSource()==mt1.bButton))
		{
			actionPerformed(e,mt1);
		}
		if((e.getSource()==mt2.aButton)||(e.getSource()==mt2.bButton))
		{
			actionPerformed(e,mt2);
		}
	}
	
	public void actionPerformed(ActionEvent e,MyThread mt)
	{
		if(e.getSource() == mt.aButton)
		{
			mt.SleepTime = Integer.parseInt(mt.bField.getText());
			mt.setButton();
		}
		if(e.getSource() == mt.bButton)
		{
			mt.interrupt();
			mt.setButton();
		}
	}

}

package packMutil;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.lang.String;

public class MyThread extends Thread {
	JPanel p;
	JLabel alabel;
	JTextField aField;
	JTextField bField;
	JButton aButton;
	JButton bButton;
	
	//随机睡眠时间
	int SleepTime = (int)(Math.random()*100);
	
	//构造函数
	public MyThread(String str)
	{
		super(str);  //调用父类的含参构造函数
		for(int i=0;i<100;i++)
		{
			str = str +" ";
		}
		aField = new JTextField(str);
		Muti1.f.add(aField);
		p = new JPanel();
		p.setLayout(new FlowLayout(FlowLayout.LEFT));
		alabel = new JLabel("Sleep");
		bField = new JTextField(""+SleepTime);
		p.add(alabel);
		p.add(bField);
		aButton = new JButton("启动");
		bButton = new JButton("中断");
		p.add(aButton);
		p.add(bButton);
		aButton.addActionListener(new Muti1());
		bButton.addActionListener(new Muti1());
		Muti1.f.add(p);
		Muti1.f.setVisible(true);
	}
	
	public void run()
	{
		String str;
		while(true)
		{
			try
			{
				str = aField.getText();
				str = str.substring(1)+str.substring(0,1);
				aField.setText(str);
				this.sleep(SleepTime);
			}catch(InterruptedException e){
				break;
			}
		}
	}
	
	public void setButton()
	{
		if(this.isAlive())
		{
			bButton.setEnabled(true);
			aButton.setEnabled(false);
		}
		if(this.interrupted())
		{
			aButton.setEnabled(true);
			bButton.setEnabled(false);
		}
	}
	
}