The string functions can be simply included by using the
jep.setComponent(new StringFunctionSet());.
This will add the following functions to jep
concat(str1,str2,...): Concatenates stringleft(str,len): returns the left most len characters from a stringright(str,len): returns the right most characters from a stringmid(str,start,len): returns the middle of a stringsubstr(str,start,end): returns a substring of a stringlen(str): returns the length of a stringlower(str): converts a string to lower-caseupper(str): converts a string to upper-casetrim(str): removes leading and trailing whitespace