title: java split sentences into words
body: <p>How to split an <code>array</code> of sentences into an <code>array of array</code> of words?
  If i can split the sentence using <code>split()</code> ..but it's used only single array.
  but I need to do multiple array..</p>
  
  <p>Eg:</p>
  
  <pre><code>sentences[0]="one sentence"
  sentences[1]=" one sen...."
  </code></pre>
  
  <p>I need to split like this...</p>
  
  <pre><code>word[0][0]="one word" //first row first word
  word[0][1]="second word"
  word[0][2]="third word"
  word[1][0]="..."//second row first word**
  </code></pre>
  
  <p>any one can help me.</p>