title: What does String Formatter in java means for $%2$.2f
body: <p>What does <strong>%2$.2F</strong> return when we use in <strong>String.Format</strong> 
  eg </p>
  
  <pre><code>String.format(Number %1$s amount of $%2$.2f failed, 1245, 1548.3587);
  </code></pre>