17_More_Exceptions.java

/**
 * Write a Calculator class with a single method: int power(int,int). 
 * The power method takes two integers, n and p, as parameters and returns the integer result of n^p. 
 * If either n or p is negative, then the method must throw an exception with the message: 
 * "n and p should be non-negative".
 */
 class Calculator {
    public static int power(int a, int b) throws Exception{
        if(a < 0 || b < 0){
            throw new Exception("n and p should be non-negative");
        }
        return (int)Math.pow(a, b);
    }
}

class Solution{

    public static void main(String[] args) {
    
        Scanner in = new Scanner(System.in);
        int t = in.nextInt();
        while (t-- > 0) {
        
            int n = in.nextInt();
            int p = in.nextInt();
            Calculator myCalculator = new Calculator();
            try {
                int ans = myCalculator.power(n, p);
                System.out.println(ans);
            }
            catch (Exception e) {
                System.out.println(e.getMessage());
            }
        }
        in.close();
    }
}