Java Thread setName() Method

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Description

The Java Thread setName() method changes the name of this thread to be equal to the argument name.

Declaration

Following is the declaration for java.lang.Thread.setName() method

public final void setName(String name)

Parameters

name − This is the new name for this thread

Return Value

This method does not return any value.

Exception

SecurityException − if the current thread cannot modify this thread.

Example: Setting name of the Thread

The following example shows the usage of Java Thread setName() method. In this program, we've created a class ThreadDemo. In main method, current thread is retrieved using currentThread() method and it is printed. Using setName(), the name of the thread is changed and printed again along with active thread count.

package com.tutorialspoint;

public class ThreadDemo {

   public static void main(String[] args) {

      Thread t = Thread.currentThread();
      // prints the thread name
      System.out.println("Thread = " + t);
    
      // change the thread name
      t.setName("Admin Thread");
     
      // prints the thread after changing name
      System.out.println("Thread after changing name = " + t);
    
      int count = Thread.activeCount();
      System.out.println("currently active threads = " + count);
   }
} 

Output

Let us compile and run the above program, this will produce the following result −

Thread = Thread[main,5,main]
Thread after changing name = Thread[Admin Thread,5,main]
currently active threads = 1