Java Thread setPriority() Method

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Description

The Java Thread setPriority() method changes the priority of this thread.

Declaration

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

public final void setPriority(int newPriority)

Parameters

newPriority − This is the priority to set this thread to.

Return Value

This method does not return any value.

Exception

• IllegalArgumentException − if the priority is not in the range MIN_PRIORITY to MAX_PRIORITY.

• SecurityException − if the current thread cannot modify this thread.

Example: Setting Priority of a Thread

The following example shows the usage of Java Thread setPriority() method. In this example, we've retrieved currently active thread using activeThread() method in main method and set priority to 1 using setPriority() method and printed the thread with active count.

package com.tutorialspoint;

public class ThreadDemo {

   public static void main(String[] args) {

      Thread t = Thread.currentThread();
      t.setName("Admin Thread");
      // set thread priority to 1
      t.setPriority(1);
     
      // prints the current thread
      System.out.println("Thread = " + 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[Admin Thread,1,main]
currently active threads = 1

Example: Setting Maximum Priority of a Thread

The following example shows the usage of Java Thread setPriority() method. In this example, we've retrieved currently active thread using activeThread() method in main method and set priority to Maximum using setPriority() method and printed the thread with active count.

package com.tutorialspoint;

public class ThreadDemo {

   public static void main(String[] args) {

      Thread t = Thread.currentThread();
      t.setName("Admin Thread");
      // set thread priority to MAX_PRIORITY
      t.setPriority(Thread.MAX_PRIORITY);     
      // prints the current thread
      System.out.println("Thread = " + 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[Admin Thread,1,main]
currently active threads = 1

Example: Setting Minimum Priority of a Thread

The following example shows the usage of Java Thread setPriority() method. In this example, we've retrieved currently active thread using activeThread() method in main method and set priority to Minimum using setPriority() method and printed the thread with active count.

package com.tutorialspoint;

public class ThreadDemo {

   public static void main(String[] args) {

      Thread t = Thread.currentThread();
      t.setName("Admin Thread");
      // set thread priority to MIN_PRIORITY
      t.setPriority(Thread.MIN_PRIORITY);     
      // prints the current thread
      System.out.println("Thread = " + 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[Admin Thread,1,main]
currently active threads = 1