Retrieves
and removes the first element of this deque. This method differs from pollFirst()
only in that it throws an exception if this deque is empty.
package com.logicbig.example.arraydeque;
import java.util.ArrayDeque;
public class RemoveFirstExample2 {
public static void main(String... args) {
ArrayDeque<Integer> ad = new ArrayDeque<>();
System.out.println(ad);
Integer integer = ad.removeFirst();
System.out.println(integer);
System.out.println(ad);
}
}
Output
Caused by: java.util.NoSuchElementException
at java.base/java.util.ArrayDeque.removeFirst(ArrayDeque.java:359)
at com.logicbig.example.arraydeque.RemoveFirstExample2.main(RemoveFirstExample2.java:15)
... 6 more