Question

Java programming. Introduction to Classes and Methods. Please write the correct code, with comments so I can understand what you did, and please make the code as SIMPLE as possible -- this is an intro to Classes/Methods practice. If your answer is right, I will give you thumbs up rating!

Each of the following methods should be static and defined in a class called Utilities. Implement a second class calledTester that calls each of these methods

Answer 1

Code: Utilities.java

import java.math.BigInteger;

public class Utilities {

public static BigInteger Factorial(int i){

//intialise fact varriable type of BigInteger

BigInteger fact=new BigInteger("1");

//calculating factorial and store in fac

for(int n=2;n<=i;n++){

fact = fact.multiply(BigInteger.valueOf(n));

}

//return fact value

return fact;

}

public static int Absulute(int i){

if(i<0){

i=i*-1;

}

else{

i=i;

}

return i;

}

}

Code: Tester.java

import java.util.Scanner;

public class Tester {

public static void main(String[] args) {

Scanner sc=new Scanner(System.in);

int n;

System.out.print("Enter number you want to find factorial: ");

//taking input from user and store in n varriable type int

//conver n for absulute value

n=Utilities.Absulute(sc.nextInt());

//calling function and print fatorial

System.out.println(n+"! = "+Utilities.Factorial(n));

}

}

Output: