JAVA program to check for a prime number

Write a JAVA program to check whether a number is prime or not.

import java.io.*;
public class PrimeCheck {
public static void main(String[] args) {
// TODO Auto-generated method stub
InputStreamReader istream = new InputStreamReader(System.in) ;
        BufferedReader read = new BufferedReader(istream) ;
        System.out.print("Enter the number: ");
        int num=0;
        try{
            num=Integer.parseInt(read.readLine() );
            int count = 0;
            for(int i=1;i<=num;i++){
            if(num%i == 0) count++;
            }
            if(count == 2) {
            System.out.println("The number "+num+" is prime.");
            }
            else{
            System.out.println("The number "+num+" is not prime.");
            }
        } catch(Exception Number){
            System.out.println("Invalid Number!");
        }
           
}
}