title: How to prevent "notice: 'StringBuilder sb' can be replaced with 'String'" in intellij-idea
body: <p>when I use the IDE -"IDEA 14.03", it always give this notice for me. notice: 'StringBuilder sb' can be replaced with 'String'</p>
  
  <p>Here is the details, when I define a object named "sb",and the object class is "StringBuilder". Here is code snippet that I tried:</p>
  
  <pre><code>StringBuilder sb = new StringBuilder("status=").append(status).append(" ,msg=").append(msg);
  System.out.println(sb);
  </code></pre>
  
  <p>I just want to know what are the benefit if I change the "StringBuilder" to "String". And why the IDE always notify me to change the class type?</p>