title: java: reverse word using StringBuffer without using String.split
body: <p>About reverse word using StringBuffer without using String.split.<br/>
  For example
  reverse<br>
  Hello world<br>
  The output must</p>
  
  <pre><code>    olleh dlrow
  </code></pre>
  
  <p>not </p>
  
  <pre><code>    dlrow olleh
  </code></pre>
  
  <p>any idea to make this program??</p>