[JAVA100 example]063, line Cheng Group

/**


* <p>title: Thread group </p>


* <p>description: Manages multiple threads below through a thread group. </p>


* <p>copyright:copyright (c) 2003</p>


* <p>Filename:myThreadgroup.java</p>


* @version 1.0


*/


public class Mythreadgroup extends Thread {


public static int flag=1;


Threadgroup TgA;


Threadgroup TgB;


/**


*<br> Method Description: Main method


*<br> input Parameters:


*<br> return type:


*/


public static void Main (string[] args) {


Mythreadgroup dt = new Mythreadgroup ();


//Declaration thread Group A


dt.tga = new Threadgroup ("A");


//Declaration thread Group B


DT.TGB = new Threadgroup ("B");


for (int i=1;i<3;i++)


New Thread1 (dt.tga,i*1000, "one" +i);


for (int i=1;i<3;i++)


New Thread1 (dt.tgb,1000, "two" +i);


//Start this thread and all thread groups


Dt.start ();


　}


/**


*<br> Method Description: Override run method, control thread group


*<br> input Parameters:


*<br> return type:


*/


public void Run () {


try{


This.sleep (5000);


this.tgB.checkAccess ();


//Stop thread Group B,


This.tgB.stop ();


System.out.println ("**************tgb stop!***********************");


this.sleep (1000);


//Check if thread Group A can change


this.tgA.checkAccess ();


//Stop thread Group A


This.tgA.stop ();


System.out.println ("**************tga stop!***********************");


　


}catch (SecurityException es) {


System.out.println ("* *" +es);


}catch (Exception e) {


System.out.println ("::" +e);


　　}


　 }


}


/**


* <p>title: Thread class </p>


* <p>description: Implements different threads </p>
via constructor parameters

* <p>copyright:copyright (c) 2003</p>


* <p>Filename:thread1.java</p>


* @author Dujiang


* @version 1.0


*/


class Thread1 extends Thread {


int pausetime;


String name;


public Thread1 (Threadgroup g,int x, String N) {


super (G,n);


pausetime = x;


name = n;


start ();


　　}


/**


*<br> Method Description: The method that must be overridden.


*<br> input Parameters:


*<br> return type:


*/


public void Run ()


　 {


while (true) {


try {


System.out.print (name+ ":::");


this.getthreadgroup (). List ().//Get thread group information


Thread.Sleep (pausetime);


} catch (Exception e) {


System.out.println (e);


　　　}


　　}


　 }


}