Java.util.ArrayDeque.removeFirst Occurrence() Method


Advertisements


Description

The java.util.ArrayDeque.removeFirstOccurrence(Object) method removes the first occurrence of the specified element in this deque.

Declaration

Following is the declaration for java.util.ArrayDeque.removeFirstOccurrence(o) method

public boolean removeFirstOccurrence(Object o)

Parameters

  • o -- The element whose first occurrence is to be removed from this deque, if present.

Return Value

This method returns true if the deque contains the specified element.

Exception

  • NA

Example

The following example shows the usage of java.util.ArrayDeque.removeFirstOccurrence(o) method.

package com.tutorialspoint;

import java.util.ArrayDeque;
import java.util.Deque;

public class ArrayDequeDemo {
   public static void main(String[] args) {
      
   // create an empty array deque with an initial capacity 
   Deque<Integer> deque = new ArrayDeque<Integer>(8);

   // use add() method to add elements in the deque
   deque.add(15);
   deque.add(20);
   deque.add(25);
   deque.add(20);

   // let us print all the elements available in deque
   for (Integer number : deque) {
   System.out.println("Number = " + number);
   }

   // this will remove first occurrence of element 20
   deque.removeFirstOccurrence(20);

   System.out.println("Remaining Elements: ");
   // let us print all the elements available in deque
   for (Integer number : deque) {
   System.out.println("Number = " + number);
   }
   }
}

Let us compile and run the above program, this will produce the following result:

Number = 15
Number = 20
Number = 25
Number = 20
Remaining Elements:
Number = 15
Number = 25
Number = 20

java_util_arraydeque.htm

Advertisements