title: What's the importance of using Random.setSeed?
body: <p>When writing Java program, we use <a href="http://docs.oracle.com/javase/7/docs/api/java/util/Random.html#setSeed%28long%29"><code>setSeed</code></a> in the <code>Random</code> class. Why would we use this method?</p>
  
  <p>Can't we just use <code>Random</code> without using <code>setSeed</code>? What is the main purpose of using <code>setSeed</code>?</p>