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In this tutorial you will be learning writing java program to perform left rotation on the array element by one place.

For example:

Suppose we have an array arr = [ 2, 4, 1, 5, 3]

So output will be [4, 1, 5, 3, 2]

Java Program to perform left rotation by one on array element

import java.util.*;
public class Main{
    public static void main (String[]args){
        Scanner sc = new Scanner (System.in);
        //Taking array size and array element as input
        System.out.println ("Enter the size of array: ");
        int size = sc.nextInt();
        int arr[] = new int[size];
        for ( int i = 0; i < size; i++){
	        System.out.print("Please give value for index " + i + " : ");
	        arr[i] = sc.nextInt();
        }
        //here our logic to perform left rotation by 1
        for(int i=0; i<1; i++)
        {
            int temp=arr[0];
            for(int j=0; j<size-1; j++)
            {
                arr[j]=arr[j+1];
            }
            arr[size-1]=temp;
        }
        System.out.println("Array after one time Left rotation");
        for(int i=0; i<size; i++)
        {
            System.out.print(arr[i]+"\t");
        }
    }
}

Output

Enter the size of array: 
5
Please give value for index 0 : 2
Please give value for index 1 : 3
Please give value for index 2 : 1
Please give value for index 3 : 4
Please give value for index 4 : 3
Array after one time Left rotation
3       1       4       3       2