Splitting a String using Word Delimiters

Question

i have a string as below

a > b and c < d or d > e and f > g

outcome must be:

a > b
and
c < d
or
d > e
and
f > g

i want to split the string at occurrences of "and" , "or" and retrieve the delims as well along with the token.[i need them in order to evaluate the expression]

i tried using StringTokenizer as

 new StringTokenizer(x, "\\sand\\s|\\sor\\s", true);

but i dont get desired outcome. i tried using scanner as

 Scanner sc = new Scanner(x);
        sc.useDelimiter("and | or");

this is able to split but doesnt return the delimiters.

please suggest.

i have given a , b , c above but there cud be words instead of a,b , c with spaces. Updated example.

Answer 1

This will split on "and" or "or" with any number of spaces surrounding the words.

   String test = "2 < 3 and 3 > 2 or 4 < 6 and 7 < 8";

    String [] splitString = test.split("\\s*[and|or]+\\s*");
    for(int i = 0; i < splitString.length ; i ++){
        System.out.println(splitString[i]);
    }

output

2 < 3
3 > 2
4 < 6
7 < 8

Answer 2

What you really want is a tool like JFlex by the time you run into all the different permutations of white spaces and as your syntax grows. In the long run you will save time.