Reports calls to static methods like String.valueOf() or Integer.toString() when they are used in a string concatenation or as an argument of a library method in which the explicit string conversion is not needed.

Example:


  System.out.println("Number: " + Integer.toString(count));

After the quick-fix is applied:


  System.out.println("Number: " + count);

Library methods in which explicit string conversion is considered redundant:

Classes java.io.PrintWriter, java.io.PrintStream
- print(), println()
Classes java.lang.StringBuilder, java.lang.StringBuffer
- append()
Class org.slf4j.Logger
- trace(), debug(), info(), warn(), error()

Use the Report calls, which can be replaced with concatenations with empty string option to additionally report cases when concatenations with empty string can be used instead of String.valueOf().