[RESOLVIDO]Prever Saida Thread

public class Thread1 {
    int x = 0;
    public class Runner implements Runnable
    {
        public void run()
        {
            int current = 0;
            for(int i =0; i<4;i++)
            {
                current = x;
                System.out.println(current + ", ");
                x = current + 2;
            }
        }                               
    }
    
    
    public void go()
    {
        Runnable r1 = new Runner();
        new Thread(r1).start();
        new Thread(r1).start();
    }
    
    public static void main(String[] args)
    {
        new Thread1().go();
    }
}