title: Point of using char rather than String
body: <p>What's the point of using char in Java?</p>
  
  <p>I know that <code>char</code> can only hold one character, while <code>String</code> can hold sentences, so what's the point of using <code>char</code> if it can hold only one character? String can also hold one character.</p>
  
  <p>I've heard that for example, <code>short</code> can use much less numbers than <code>int</code>, however its advantage is that it uses much less memory, is there something similar with <code>char</code> and <code>String</code>?</p>