title: StringUtils.isBlank return false for null Strings
body: <p>I am working in a Java project and my code shows weird behavior. Here is my code:</p>
  
  <pre><code>String access = String.valueOf(getStringvalue());
  Boolean isBlank = StringUtils.isBlank(access);
  </code></pre>
  
  <p>In the above code, 'access' object can have null values.
  And it is said that if we pass a null value to <code>StringUtils.isBlank()</code>, it will return true. But here I returned only false value when <code>access</code> is null. What is the reason for this behavior?</p>