title: Printing reference to an object
body: <p>I am a newbie in java. Say, I have a class <em>Individual</em>. I want to print </p>
  
  <pre><code>Individual ind = new Individual();
  System.out.println(ind);
  </code></pre>
  
  <p>Above code gives output like this:</p>
  
  <pre><code>Individual@1922221
  </code></pre>
  
  <ol>
  <li>What is the significance of this? </li>
  <li>Is it some kind of unique id
  for that object? </li>
  <li>Can I customize this? I mean write a function of
  my own which will give output when I print? </li>
  <li>If so, how can I do
  this?</li>
  </ol>