prime number check using java

import java.util.Scanner;
public class prime {
    public static void main(String[]args){
        Scanner sc= new Scanner(System.in);
        System.out.println("enter the any number");
        int a=sc.nextInt();
        int suraz =0;
        for(int i=1; i<=a; i++){
            if(a%i==0){
                suraz++;
            }
        }
        if(suraz==2)
        System.out.println("this is a prime");
        else
        System.out.println("this is not prime");
    }
    
}

without scanner

public class prime2{
    public static void main(String []args){
        int n=;
        int count =0;
        for(int i=1; i<=n; i++){
            if(n%i==0){

                count ++;
            }
        }
        if(count==2)
        System.out.println("this is prime");
        else
        System.out.println("this is not prime");
    }
    
}