Program: How to get index of a sub list from another list?

Collections.indexOfSubList() method 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.

package com.java2novice.collections;

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

public class MySubListIndex {

	public static void main(String a[]){
		
		List<String> list = new ArrayList<String>();
		list.add("java");
		list.add("c");
		list.add("c++");
		list.add("unix");
		list.add("perl");
		list.add("php");
		list.add("javascript");
		list.add("ruby");
		list.add(".net");
		list.add("jdbc");
		list.add("servlets");
		List<String> subList = new ArrayList<String>();
		subList.add("php");
		subList.add("javascript");
		subList.add("ruby");
		System.out.println("Index of sublist: "+Collections.indexOfSubList(list, subList));
	}
}

Index of sublist: 5