title: comparing uppercase and lowercase using compareTo() method in java
body: <p>I want to  compare uppercase and lowercase using <code>compareTo()</code> method in java.
  Below is the code snippet I have used but not able to understand why it is returning 32.</p>
  
  <pre><code>String s1="a"; 
  String s2="A";
  System.out.println(s1.compareTo(s2)); 
  //return 32
  </code></pre>