Program to find perfect number or not

Description:

A perfect number is a positive integer that is equal to the sum of its proper positive divisors, that is, the sum of its positive divisors excluding the number itself. Equivalently, a perfect number is a number that is half the sum of all of its positive divisors. The first perfect number is 6, because 1, 2 and 3 are its proper positive divisors, and 1 + 2 + 3 = 6. Equivalently, the number 6 is equal to half the sum of all its positive divisors: ( 1 + 2 + 3 + 6 ) / 2 = 6

package javaprgms;

public class IsPerfectNumber {

    public boolean isPerfectNumber(int number){

        

        int temp = 0;

        for(int i=1;i<=number/2;i++){

            if(number%i == 0){

                temp += i;

            }

        }

        if(temp == number){

            System.out.println("It is a perfect number");

            return true;

        } else {

            System.out.println("It is not a perfect number");

            return false;

        }

    }

    

    public static void main(String a[]){

        IsPerfectNumber ipn = new IsPerfectNumber();

        System.out.println("Is perfect number: "+ipn.isPerfectNumber(28));

    }

}

Output :

It is a perfect number

Is perfect number: true