Java Program to check a number is prime or not using class and object


In this program, You will learn how to check a number is prime or not using class and object in Java.


Some list of prime numbers is : 2 3 5 7 11


Example: How to check a number is prime or not using class and object in Java

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import java.util.Scanner;

class Test {

    int n, i, p = 1;

    Scanner sc = new Scanner(System.in);

    void input() {

        System.out.print("Enter a Number :");
        n = sc.nextInt();
    }

    void checkPrime() {
        for (i = 2; i < n; i++) {
            if (n % i == 0) {
                p = 0;
                break;
            }
        }

        if (p == 1) {
            System.out.println("\nNumber is prime :" + n);
        } else {
            System.out.println("\nNumber is not prime :" + n);
        }

    }
}

class Main {

    public static void main(String args[]) {

        Test obj = new Test();
        obj.input();
        obj.checkPrime();

    }
}

Output:

Enter a Number :7
Number is prime :7