JAVA EE: Java : Collection Framework : LinkedList (removeFirstOccurrence & removeLastOccurrence methods)

Friday 7 November 2014

Java : Collection Framework : LinkedList (removeFirstOccurrence & removeLastOccurrence methods)

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LinkedListExample.java

import java.util.LinkedList;

/*
 * Example of removeFirstOccurrence(Object o) and removeLastOccurrence(Object o) methods
 */
public class LinkedListExample
{

    public static void main( String[] args )
    {
        LinkedList<Integer> linkedList = new LinkedList<Integer>();
        linkedList.add(200);
        linkedList.add(300);
        linkedList.add(200);
        linkedList.add(5000);
        linkedList.add(200);
        linkedList.add(800);

        System.out.println("linkedList : " + linkedList + "\n");

        /*
         * Removes the first occurrence of the specified element in this list
         * (when traversing the list from head to tail). If the list does not
         * contain the element, it is unchanged.
         */
        boolean isRemoved = linkedList.removeFirstOccurrence(200);
        System.out.println("isRemoved : " + isRemoved);
        System.out.println("linkedList : " + linkedList + "\n");

        /*
         * Removes the last occurrence of the specified element in this list
         * (when traversing the list from head to tail). If the list does not
         * contain the element, it is unchanged.
         */
        isRemoved = linkedList.removeLastOccurrence(200);
        System.out.println("isRemoved : " + isRemoved);
        System.out.println("linkedList : " + linkedList + "\n");

    }
}

Output

linkedList : [200, 300, 200, 5000, 200, 800]

isRemoved : true
linkedList : [300, 200, 5000, 200, 800]

isRemoved : true
linkedList : [300, 200, 5000, 800]