Sum of digits in an integer in an array

Think about the logical steps you need to perform:
- read the next number
- set the sum to zero
- calculate the sum of the digits in the input number
- print the sum
- repeat for the next input

Quote:

Expected Output:
5
2
I am getting output as 7. How can i solve this?

Your actual output is the sum of expected output.
Just a guess:
- you print result in wrong place.
- you forgot to reset the sum to 0.
-----
Advice: Learn to indent properly your code, it show its structure and it helps reading and understanding. It also helps spotting structures mistakes.

import java.util.Scanner;
public class Main
{
    public static void main(String args[])
    {
        int n, sum = 0;

        Scanner sc = new Scanner(System.in);
        int size=sc.nextInt();
        System.out.print("Enter the number:");
        int a[]= new int[size];
        for(int i=0;i<size;i++)
        {
            a[i]=sc.nextInt();
        }
        for(int i=0;i<size;i++)
        {
            for(int j=0;j<size;j++)
            {
                while(a[j] > 0)
                {
                    n = a[j] % 10;
                    sum = sum + n;
                    a[j] = a[j] / 10;
                }
            }
        }
        System.out.println("Sum of Digits:"+sum); // wrong place
    }
}

Indentation style - Wikipedia[^]

Professional programmer's editors have this feature and others ones such as parenthesis matching and syntax highlighting.
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import java.util.Scanner;
public class Main
{
public static void main(String args[])
{
int n, sum = 0;

Scanner sc = new Scanner(System.in);
int size=sc.nextInt();
System.out.print("Enter the number:");
int a[]= new int[size];
for(int i=0;i<size;i++)
{
="" a[i]="sc.nextInt();
" }
="" for(int="" i="0;i<size;i++)
" j="0;j<size;j++)
" while(a[j]=""> 0)
{
n = a[j] % 10;
sum = sum + n;
a[j] = a[j] / 10;
}
System.out.println("Sum of Digits:"+sum);
sum=0;
}
}

}
}

import java.util.Scanner;
class SumDigits {
	public static void main(String []args)
	{
	ArrayOperation1 ao=new ArrayOperation1();
	int x[]=ao.readArray();
	System.out.println("User Enterred array is");
	ao.displayArray(x);
	System.out.println();
	int []rs=ao.isSumOfDigits(x);
	System.out.println("The sum of digits of elements in an array is");
	for (int i = 0; i < rs.length; i++) {
		System.out.print(rs[i]+" ");
	}
  }
}

 class ArrayOperation1 {
	public int[] readArray() {
		Scanner sc=new Scanner(System.in);
		System.out.println("Enter size of array");
		int n=sc.nextInt();
		int ar[]=new int[n];
		System.out.println("enter the elements");
		for (int i=0;i<ar.length;i++)
		{
		ar[i]=sc.nextInt();
		}
		return ar;	
	}
	void displayArray(int []x) {
		for (int i = 0; i < x.length; i++) {
			System.out.print(x[i]+" ");
		}
	}
	public int[] isSumOfDigits(int[] x) {
		int ar[]=new int[x.length];
		for (int i = 0; i < x.length; i++) {
			int r=update(x[i]);
			ar[i]=r;
			}
		return ar;
		}
	 int update(int y) {
		 int sum=0;
		while (y>0) {
			int re=y%10;
			sum=sum+re;
			y=y/10;
		}
		return sum;
	}
}