Java Collections Java Java API
Class:
java.util.ArrayDeque
Method:
public E poll()
Retrieves and removes the head of the queue represented by this deque.
This method is equivalent to pollFirst().
Examples
 package com.logicbig.example.arraydeque;
import java.util.ArrayDeque;
import java.util.List;
public class PollExample {
public static void main(String... args) {
ArrayDeque<Integer> ad = new ArrayDeque<>(List.of(3, 8, 5, 7));
System.out.println(ad);
Integer element = ad.poll();
System.out.println(element);
System.out.println(ad);
}
}
Output[3, 8, 5, 7]
3
[8, 5, 7]
package com.logicbig.example.arraydeque;
import java.util.ArrayDeque;
import java.util.List;
public class PollExample2 {
public static void main(String... args) {
ArrayDeque<Integer> ad = new ArrayDeque<>(List.of(1));
Integer element = ad.poll();
System.out.println(element);
element = ad.poll();
System.out.println(element);
}
}
Output1
null
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