Reports any usages of StringBuffer, StringBuilder or StringJoiner which can be replaced with a single java.lang.String concatenation. Using a String concatenation makes the code shorter and simpler. Example:

  StringBuilder result = new StringBuilder();
  result.append("i = ");
  result.append(i);
  result.append(";");
  return result.toString();

This code could be replaced with

  String result = "i = " + i + ";";
  return result;

This inspection only reports when the suggested replacement does not result in significant performance drawback on modern JVMs. In many cases the String concatenation may perform better.