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Tip of the Day
Language: Java
Expertise: Intermediate
Sep 29, 2017

Keeping Tabs on all Threads in Your Environment

Oftentimes, you might want to understand and control all the threads in your runtime. Java provides an effective and easy mechanism to achieve this using Thread.activeCount() and Thread.enumerate() methods.

public class KnowAllThreads {

   public static void main(String args[]) {

     Thread myThread = Thread.currentThread();
     myThread.setName("My Thread");

     myThread.setPriority(1);

     System.out.println("Current thread: " + myThread);

     int activeThreadsCount = Thread.activeCount();
     System.out.println("Count of active threads: " + activeThreadsCount);
     Thread allThreads[] = new Thread[activeThreadsCount];
     Thread.enumerate(allThreads);

     for (Thread threadDetails : allThreads)
     {
        System.out.println(threadDetails);
     }
   }
}
M S Sridhar
 
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