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how to rotate element in list java?


The java.util.Collections class consists exclusively of static methods that operate on or return collections. It contains polymorphic algorithms that operate on collections, “wrappers”, which return a new collection backed by a specified collection, and a few other odds and ends.

Collections.rotate() method will rotates the elements in the specified list by the specified distance.
Syntax: public static void rotate(List list,int distance)

Example

package com.codesjava;
 
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
 
public class Test {     
    public static void main(String a[]){
    	List<String> list = new ArrayList<String>();
    	list.add("vikas");
        list.add("amit");
        list.add("ajay");
        list.add("mahesh");
        list.add("anil");
        System.out.println(list);
        Collections.rotate(list, 3);
        System.out.println("List after rotation:");
        System.out.println(list);
    }
}

Output

[vikas, amit, ajay, mahesh, anil]
List after rotation:
[ajay, mahesh, anil, vikas, amit]

Java Collections class examples



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