LinkedTransferQueue isEmpty() method in Java

Last Updated : 14 Sep, 2018

The isEmpty() method of java.util.concurrent.LinkedTransferQueue is an in-built function in Java which checks if this queue is empty or not.

Syntax:

LinkedTransferQueue.isEmpty()

Return Value: The function returns a boolean value. It returns true if the LinkedTransferQueue is empty and returns false otherwise.

Below programs illustrate the LinkedTransferQueue.isEmpty() method:

Program 1: In this program the LinkedTransferQueue is non-empty.

// Java Program Demonstrate isEmpty() 
// method of LinkedTransferQueue 
  
import java.util.concurrent.*; 
  
class LinkedTransferQueueIsEmptyExample1 { 
    public static void main(String[] args) 
    { 
  
        // Initializing the queue 
        LinkedTransferQueue<Integer> 
            queue = new LinkedTransferQueue<Integer>(); 
  
        // Adding elements to this queue 
        for (int i = 10; i <= 15; i++) 
            queue.add(i); 
  
        // Checks if this queue is empty or not 
        if (queue.isEmpty()) 
            System.out.println("The queue is empty."); 
        else
            System.out.println("The queue is non-empty."); 
    } 
} 

Output:

The queue is non-empty.

Program 2:In this program the LinkedTransferQueue is empty.

// Java Program Demonstrate isEmpty() 
// method of LinkedTransferQueue */ 
  
import java.util.concurrent.*; 
  
class LinkedTransferQueueIsEmptyExample2 { 
    public static void main(String[] args) 
    { 
  
        // Initializing the queue 
        LinkedTransferQueue<Integer> 
            queue = new LinkedTransferQueue<Integer>(); 
  
        // Checks if this queue is empty or not 
        if (queue.isEmpty()) 
            System.out.println("The queue is empty."); 
        else
            System.out.println("The queue is non-empty."); 
    } 
} 

Output:

The queue is empty.

Reference: https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/LinkedTransferQueue.html#isEmpty()

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