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Java Program to get Name and priority of Thread.

Java Code Example — Multithreading Programs

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Java Program to get Name and priority of Thread.

Objective

Write a Java program to get and display the default name and priority of threads.

Algorithm / Approach

  1. Create a class extending Thread with an empty run() method.
  2. In main, instantiate three thread objects.
  3. Use the getName() method to retrieve the default name assigned by the JVM.
  4. Use the getPriority() method to retrieve the default priority level assigned by the JVM.
  5. Print the results.
Test.java 
class Test extends Thread {
 public void run() {
  System.out.print("Run Method");
 }
}
class Demo{
 public static void main(String[] a)
 {
  Test t = new Test();
  Test t2 = new Test();
  Test t3 = new Test();
  System.out.print("Name: ");
  System.out.println(t.getName());
  System.out.print("Priority: ");
  System.out.println(t.getPriority());
  System.out.print("Name: ");
  System.out.println(t2.getName());
  System.out.print("Priority: ");
  System.out.println(t2.getPriority());
  System.out.print("Name: ");
  System.out.println(t3.getName());
  System.out.print("Priority: ");
  System.out.println(t3.getPriority());
 }
}

Expected Output

Name: Thread-0
Priority: 5
Name: Thread-1
Priority: 5
Name: Thread-2
Priority: 5

Explanation of the Program

  • Every thread in Java is automatically given a name (e.g., Thread-0, Thread-1) and a priority by the JVM when it is created.
  • Thread priorities dictate to the thread scheduler which threads should get CPU time first. The scale goes from 1 (MIN_PRIORITY) to 10 (MAX_PRIORITY).
  • By default, all user threads inherit a normal priority of 5 (NORM_PRIORITY) from the main thread. You can change this later using setPriority().

Complexity

Time Complexity O(1)
Space Complexity O(1)
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