IT. Expert System.

The java.lang.Thread.getId() method returns the identifier of this Thread. The thread ID is a positive long number generated when this thread was created. The thread ID is unique and remains unchanged during its lifetime. When a thread is terminated, this thread ID may be reused.

Syntax:

public long getId()

Example:

import java.lang.*;

public class ThreadDemo implements Runnable {

   Thread t;
   ThreadDemo() {
    
      // thread created
      t = new Thread(this, "Admin Thread");
      // set thread priority
      t.setPriority(1);
      // prints thread created
      System.out.println("thread  = " + t);
      // this will call run() function
      t.start();
   }

   public void run() {
      // returns the identifier of this Thread.
      System.out.println("Name = " + t.getName());
      System.out.print("Id = " + t.getId());
   }

   public static void main(String args[]) {
      new ThreadDemo();
   }
}

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