First400Primes.java

public class First400Primes {

    /**
    *   Program:    First400Primes.java
    *   Purpose:    Display the first 400 prime numbers
    *   Creator:    Chris Clarke
    *   Created:    02.09.2012
    */

    public static void main(String[] args) {
        int n=0;    // seed of primes
        int c=0;    // number of primes
        do {
            if (isPrime(n)) {
                System.out.print(" "+n);
                c++;
            }
            n++;
        } while (c <= 400);
    }

    public static boolean isPrime(int k) {
        if (k<2) return false;

        for(int j=2; j<=k/2; j++)
            if (k%j==0) return false;

        return true;
    }
}