Write a java program to Define a method to Display pair of elements which sum is Equal to n

import java.util.Scanner;

public class PairInArray {

static Scanner sc=new Scanner(System.in);

public static void main(String[] args) {

System.out.println("Enter Length of Array : ");

int n=sc.nextInt();

int arr[]= new int[n];

               

System.out.println("enter value in array : ");

for (int i=0; i<n; i++) {

arr[i]=sc.nextInt();

}

System.out.println("\nEnter  a number you check pair : ");

int pair=sc.nextInt();

for (int i = 0; i < arr.length; i++) {

for (int j = i+1; j < arr.length; j++) {

if(pair==arr[i]+arr[j])

System.out.println(i+"  "+j);

}

}

}

}