Java ThreadGroup list() Method with Examples

by Online Tutorials Library July 22, 2022

Java ThreadGroup list() method

The list() method of ThreadGroup class is used to display the information about the thread group. It is useful only for debugging.

Syntax

Return

This method does not return any value.

Example

  class List extends Thread   {      List(String threadname, ThreadGroup tgob)      {          super(tgob, threadname);      }      public void run()      {          for (int i = 0; i < 10; i++)           {              try              {                  Thread.sleep(10);              }              catch (InterruptedException ex){              }          }          System.out.println(Thread.currentThread().getName() + ” completed executing”);      }  }   public class ThreadGroupListExp   {      public static void main(String arg[]) throws InterruptedException,          SecurityException, Exception      {          // creating the thread group          ThreadGroup tg1 = new ThreadGroup(“Parent thread”);          ThreadGroup tg2 = new ThreadGroup(tg1, “Child thread”);                    // creating a thread          List t1 = new List(“Thread-1″, tg1);          System.out.println(t1.getName() +” starts”);          t1.start();                    // creating an another thread          List t2 = new List(“Thread-2″, tg1);          System.out.println(t2.getName() +” starts”);          t2.start();             // listing contents of parent ThreadGroup          System.out.println(“nListing parentThreadGroup: ” + tg1.getName() + “:”);          // prints information about this thread group to the standard output          tg1.list();      }  }  

Test it Now

Output:

Thread-1 starts  Thread-2 starts    Listing parentThreadGroup: Parent thread:  java.lang.ThreadGroup[name=Parent thread,maxpri=10]      Thread[Thread-1,5,Parent thread]      Thread[Thread-2,5,Parent thread]      java.lang.ThreadGroup[name=Child thread,maxpri=10]  Thread-1 completed executing  Thread-2 completed executing

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Java ThreadGroup list() Method with Examples

Java ThreadGroup list() method

Syntax

Return

Example

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