CopyString.java

public String copyString(String input){
  if (input == null){
    return null;
  }

  try{
    StringBuildersb = newStringBuilder();

    for (inti=0;i<input.codePointCount(0,input.length());i++){
      sb.appendCodePoint(input.codePointAt(i));
    }

    return sb.toString();
    
  }catch(Exception e){
    logger.error(e, e);
    return "";
  }
}