Expected results contradict the condition for the input -1 -2 it shows "java.lang.Exception: n or p should not be negative." when it clearly states if both are negative it should throw exception "java.lang.Exception: n and p should not be negative"

This is my code but don't know what is problem i failed in run code

import java.io.; import java.util.; class MyCalculator{ long power(int n,int p)throws Exception{ if(n<0||p<0) throw new Exception("n or p should not be negative"); else if(n==0&&p==0) throw new IOException("n and p should not be zero"); else
} return (long)Math.pow(n,p); } public class Solution {

public static void main(String[] args) {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
    MyCalculator mc = new MyCalculator();
    Scanner sc = new Scanner(System.in);
    try{
        int n=sc.nextInt();
        int p=sc.nextInt();
        System.out.println(mc.power(n,p));
    }
    catch(Exception e){
        System.out.println(e.getMessage());
    }
}

}

Someone please help to correct. Getting failed test case and wrong answer-

class MyCalculator { public long power(int n, int p) throws Exception{

     if(n<0 || p<0){

        throw new Exception("n or p should not be negative");
     }
     else if(n==0 && p==00){

         throw new Exception("n and p should not be zero");
     }
     else{
         return (long) Math.pow(n,p);
     }

}

import java.lang.; import java.math.; class MyCalculator { /* * Create the method long power(int, int) here. */ public long power(int n,int p) throws Exception{ if(n<0 || p<0){ throw new Exception("n or p should not be negative."); } else if(n==0 && p==0){ throw new Exception("n and p should not be zero."); }

    long ans;
    ans=(long)Math.pow(n,p);

    return ans;
}

}