Java : Collection Framework : Collections (IndexOfSubList)

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CollectionsExample.java

import java.util.ArrayList;
import java.util.Collections;

/*
 Method: 

 public static int indexOfSubList(List<?> source,List<?> target)

 Parameters:

 source - the list in which to search for the first occurrence of target.
 target - the list to search for as a subList of source.

 Returns:

 the starting position of the first occurrence of the specified target list 
 within the specified source list, or -1 if there is no such occurrence.

 */

public class CollectionsExample
{

    public static void main(String[] args)
    {

        ArrayList<Integer> sourceList = new ArrayList<Integer>();

        sourceList.add(2000);
        sourceList.add(3000);
        sourceList.add(4000);
        sourceList.add(5000);
        sourceList.add(6000);

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

        ArrayList<Integer> targetList = new ArrayList<Integer>();

        targetList.add(4000);
        targetList.add(5000);

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

        /*
         * Returns the starting position of the first occurrence of the
         * specified target list within the specified source list, or -1 if
         * there is no such occurrence.
         */
        int indexPostion = Collections.indexOfSubList(sourceList, targetList);

        System.out.println("indexPostion : " + indexPostion);

    }

}

Output

sourceList : [2000, 3000, 4000, 5000, 6000]

targetList : [4000, 5000]

indexPostion : 2

To Download CollectionsDemoIndexOfSubList Project Click the below link
https://sites.google.com/site/javaee4321/java-collections/CollectionsDemoIndexOfSubList.zip?attredirects=0&d=1

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