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Problem: Java Exception Handling

Problem Statement
Create a class myCalculator which consists of a single method power(int,int). This method takes two integers, n and p, as parameters and finds np. If either n or p is negative, then the method must throw an exception which says "n and p should be non-negative".
Please read the partially completed code in the editor and complete it. Your code mustn't be public.
No need to worry about constraints, there won't be any overflow if your code is correct.
Sample Input
3 5
2 4
-1 -2
-1 3
Sample Output
243
16
java.lang.Exception: n and p should be non-negative
java.lang.Exception: n and p should be non-negative


import  java.util.*;
class myCalculator{
    int power(int n,int p) throws java.lang.Exception{
        int power=1;
        while(p>0){
            power=power*(n);
            p--;
        }
       
        if(n==0) power=0;
       
       if(n<0 | p<0){
           throw new java.lang.Exception("n and p should be non-negative");
       }
        else return power;
    }
}

class Solution{
public static void main(String []argh)
    {
        Scanner in = new Scanner(System.in);
        while(in.hasNextInt())
        {
            int n = in.nextInt();
            int p = in.nextInt();
            myCalculator M = new myCalculator();
            try
            {
                System.out.println(M.power(n,p));
            }
            catch(Exception e)
            {
                System.out.println(e);
            }
        }

    }
}

·         Testcase 0
Congratulations, you passed this test case!
Input (stdin)
3 5
2 4
-1 -2
-1 3
Your Output (stdout)
243
16
java.lang.Exception: n and p should be non-negative
java.lang.Exception: n and p should be non-negative
Expected Output
243
16
java.lang.Exception: n and p should be non-negative
java.lang.Exception: n and p should be non-negative


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