JAVA program to print all prime numbers between two user given numbers

JAVA program to print all prime numbers between two user given numbers.

import java.io.*;
public class MyMain {
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 first number: ");
        int num1=0, num2=0;
        try{
            num1=Integer.parseInt(read.readLine() );
            System.out.print("Enter the second number: ");
            num2=Integer.parseInt(read.readLine() );
            if(num1>=num2){ //Checking for valid range
            System.out.println("The first number should must be less than the second number.");
            }
            else{
            for(int i=num1;i<=num2;i++){
            int count = 0; //Setting a counter
            for(int j=1;j<=i;j++){
            if(i%j==0) count++;
            }
            if(count == 2)
            System.out.println(i+ " is a prime number.");
            else
            System.out.println(i+ " is a non-prime number.");
            }
            }
           
        } catch(Exception Number){
            System.out.println("Invalid Number!");
        }
           
}
}

Output: 

Enter the first number: 12
Enter the second number: 23
12 is a non-prime number.
13 is a prime number.
14 is a non-prime number.
15 is a non-prime number.
16 is a non-prime number.
17 is a prime number.
18 is a non-prime number.
19 is a prime number.
20 is a non-prime number.
21 is a non-prime number.
22 is a non-prime number.
23 is a prime number.