Timer

public static void main(String[] args) {
       String ans = "";
       long y = 0;
       long start = System.currentTimeMillis();
       for (int x = 100000; x <=1200000; x+=100000)

       {
       for (long i = y; i <= x; i++)
           System.out.println(i);

       }

       y+= 100000;

      long end = System.currentTimeMillis();
      String temp = Long.toString(end - start);
      ans= ans + " " + temp;


      System.out.println("it took = " + (ans));