Boolean counting short program

Question

Hi. I'm on day 2 of Java - and day 2 to programing in general-so please bear with me. I'm trying to write a short program using the IsPrime method to count primes from 1-500. Below is what I've written. The class is listed below that and then the error message that results. Any help would be appreciated.
public class Prime {
public static void main (String[] arguments) {
     final int LIMIT = 500
          int count = 0
          do
          System.out.println (count);
          count++
     while (count <LIMIT)
int number = input.nextInt();
Prime p = new Prime();
boolean isPrime = isPrime(number);
if (isPrime == true)
System.out.println("%d is Prime...500", number);
else
System.out.println("%d is not Prime...500", number);
class Prime
public boolean isPrime( int number ) {
for (int factor = 2; factor <= Math.sqrt(number); factor++)
if (number % factor == 0)
return false;
return true;
C:\J21work>javac 2assignment07.java
2assignment07.java:5: ';' expected
int count = 0
^
2assignment07.java:10: ';' expected
while (count <LIMIT)
^
2 errors

Answer 1

Hi,
I found some of the errors mentioned above, and I believe I found some others as well.
1) Your first posting of code shows you declaring the class Prime twice, was this just an oversight when you posted? If not, move the isPrime() method into the first definition of class Prime(), this is the easiest way to achieve what you want (i.e. not having to instantiate a class, etc).
2) You had what appears to be a call to the scanner class in
input.nextInt();but I didn't see where you created an object of Scanner. Maybe I am missing something, but I don't think that will compile, will it?
3) As noted above, you need ';' terminating your lines. Also, not required, but I find it extremely helpful to place all code inside of if blocks within {}. This is only required when there are multiple lines of code within the block, but having them makes debugging so much easier.
I touched up hyour code a bit, I'm no expert, but it works.... let me know if you have any questions.
import java.util.Scanner; //In order to access the Scanner class you need to import it first
public class Prime {
     public static void main (String[] arguments) {
          final int LIMIT = 10;
          int count = 0;
          Scanner keyboard = new Scanner(System.in);
          do{
               System.out.println (count);
               count++;
          }while (count <LIMIT);
          System.out.println("Enter a prime number:"); //When requring console input, alwasy prompt the user
          int number = keyboard.nextInt();
          if (isPrime(number)) { //Curly braces are your friend....
               System.out.printf("%d is Prime...500", number);
          else {
               System.out.printf("%d is not Prime...500", number);
     public static boolean isPrime( int number )
          for (int factor = 2; factor <= Math.sqrt(number); factor++) //Not sure about ><= you had here....
               if (number % factor == 0)
                    return false;
               return true;
          return false;
}