Java RNG seeding

My question concerns the Java RNG; use the following code:

for (int s = 0; s < 600; s++) {
   Random r = new Random(s);
   System.out.println(r.nextDouble());
   System.out.println(r.nextDouble() + "\n-----");
}

This will result in 600 random numbers being generated. I know this is a bit odd, but I require a new random number generator each time in my actual project. The seed I receive is sequential. The first random double that is generated is extremely close for any of the seeds, is this because of the linear congruential formula that is used as initialization?

The second double generated actually looks like it is actually properly random, is this safe to assume so? Is it OK practice to first generate an unused random number, and after that moment start to use it for the actual reason it was created?

Thank you in advance