Question

How do you separate an arithmetic expression with space, example i have this expression 22+(33*1) i want to split them with space between operators in the same string (returning a String) like 22 + ( 33 * 1 ) by the way im using StringTokenizer

Answer 1

Your rule is simpler then you think. Probably correct java:

expr = expr.replaceAll('+', ' + ')
           .replaceAll('-', ' - ')
           .replaceAll(')', ' ) ')
           //etc
           .replaceAll(' ', '  '); //remove any double spaces added.