Java Deque pollFirst() Method
The pollFirst() method of Java Deque Interface is used to retrieve and remove the first element of the deque. The method may return null if the given deque is empty.
The above method is used to return the head of the deque. On the other hand, if the deque is empty, the method may return null.
Example 1Test it Now
The first character is given as : q The remaining deque is : u e r y
Example 2Test it Now
The first string is given as : Hello The remaining deque is : [ , World]
Example 3Test it Now
The first long value is given as : 88 The resultant deque is : [88, 78, 67]