The queue.isEmpty() function in Java is used to check if a queue is empty or not. queue.isEmpty() returns true if the queue is empty; otherwise, it returns false.
The illustration below shows the visual representation of the queue.isEmpty() function.
The
java.util.*module is required in order to use this function.
public boolean isEmpty()
The queue.isEmpty() function does not require any parameters.
If the queue is empty, the queue.isEmpty() function returns true. Otherwise, it returns false.
import java.util.*;class JAVA {public static void main( String args[] ) {Queue<Integer> Queue = new LinkedList<Integer>();// adding elements to QueueQueue.add(1);Queue.add(3);Queue.add(5);Queue.add(2);Queue.add(0);//filed queueSystem.out.println("The Queue is empty: " + Queue.isEmpty());Queue<Integer> Queue_2 = new LinkedList<Integer>();//empty queueSystem.out.println("The Queue_2 is empty: " + Queue_2.isEmpty());}}