title: Most efficient way of converting String to Integer in java
body: <p>There are many ways of converting a String to an Integer object. Which is the most efficient among the below:</p>
  
  <pre><code>Integer.valueOf()
  Integer.parseInt()
  org.apache.commons.beanutils.converters.IntegerConverter
  </code></pre>
  
  <p>My usecase needs to create wrapper Integer objects...meaning no primitive int...and the converted data is used for read-only. </p>