Prime number program in java

Java program to check whether given number is prime number or not

import java.io.*;

class Test {

     public static void main(String[] args) throws IOException {

          int num,i,count=0;

          System.out.println("Enter a number");

          BufferedReader br=new BufferedReader(new InputStreamReader (System.in));

          num=Integer.parseInt(br.readLine());

          for(i=1;i<=num;i++){

              if(num%i==0)

                   count++;

          }

          if(count==2)

              System.out.println(num+" is a prime number");

          else

              System.out.println(num+"is not a prime number");

     }

}

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