Collections.rotate(List, int) in Java

Collections.rotate(List, int): This method is available in java.util.Collections class of Java.

Syntax:

void java.util.Collections.rotate(List<?> list, int distance)

This method takes two arguments. This method rotates the elements in the specified list by the specified distance.

Note: After calling this method, the element at index i will be the element previously at index (i - distance) mod list.size(), for all values of i between 0 and list.size()-1, inclusive.

Parameters: Two parameters are required for this method.

list: the list to be rotated.

distance: the distance to rotate the  list. There are no constraints on this value; it may be zero, negative, or greater than list.size().

Throws:

UnsupportedOperationException - if the specified list or its list-iterator does not support the set operation.

Approach

Java

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

public class Collectionsrotate {
    public static void main(String[] args) {

        List<Integer> arrlist = new ArrayList<Integer>();

        arrlist.add(12);
        arrlist.add(56);
        arrlist.add(899);
        arrlist.add(65);
        arrlist.add(5);

        int distance = 2;
        Collections.rotate(arrlist, distance);

        System.out.println(arrlist);

    }
}

Output:

[65, 5, 12, 56, 899]