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Usage of element() method of Queues in Java
The element() method in Java Queues is used to return the element at the front of the container and does not remove it.
The following is an example. Firstly, create a Queue and add some elements −
Queue<String> q = new LinkedList<String>();
q.offer("abc");
q.offer("def");
q.offer("ghi");
q.offer("jkl");
q.offer("mno");
q.offer("pqr");
q.offer("stu");
q.offer("vwx");Now use the element() method as shown below −
System.out.println("Queue head = " + q.element());The following is the complete example −
Example
import java.util.LinkedList;
import java.util.Queue;
public class Demo {
public static void main(String[] args) {
Queue<String> q = new LinkedList<String>();
q.offer("abc");
q.offer("def");
q.offer("ghi");
q.offer("jkl");
q.offer("mno");
q.offer("pqr");
q.offer("stu");
q.offer("vwx");
System.out.println("Queue head = " + q.element());
System.out.println("Removing element from queue = " + q.remove());
System.out.println("Queue head now = " + q.element());
System.out.println("
Remaining Queue elements...");
Object ob;
while ((ob = q.poll()) != null) {
System.out.println(ob);
}
}
}Output
Queue head = abc Removing element from queue = abc Queue head now = def Remaining Queue elements... def ghi jkl mno pqr stu vwx
Updated on: 25-Jun-2020
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