import java.io.*;
public class PrimeHandler implements Runnable{
	private long prime = 2;
	public String getPrime(String pass){
		String strPrime = null;
		//Hämtar det sista primtalet som tråden har hittat (från fil)
		try{
			FileInputStream fstream = new FileInputStream("counter.txt");
			DataInputStream in = new DataInputStream(fstream);
			strPrime = in.readLine();
			in.close();
		}catch (FileNotFoundException fnfe){
			strPrime = "2";
		}catch (Exception e){
			System.err.println ("Error reading from file");
			e.printStackTrace();
		}
		if (pass.equals("2isAnOddPrime")){
			return strPrime;
		}else{
			return "Wrong Password!";
		}
	}
	private boolean isPrime(long candidate) {
		long sqrt = (long)Math.sqrt(candidate);
		for(long i = 2; i <= sqrt; i++)
			if(candidate % i == 0) return false;
		return true;
	}

	public void run(){
		while(true){
			prime++;
			FileOutputStream out; 
			PrintStream p;
			if (isPrime(prime)){
				try{
					//Skriver ut det funna primtalet på fil
					out = new FileOutputStream("counter.txt");
					p = new PrintStream(out);
					p.println ("" + prime);
					p.close();
				}
				catch (Exception e){
					System.err.println ("Error writing to file");
				}
				try { 
					Thread.sleep(1000); 
				}catch(Exception e){
				}
			}
		}
	}
	public static void main(String[] args){
		PrimeHandler ph = new PrimeHandler();
		new Thread(ph).start();
	}
}