It is difficult to understand for your description to know exactly what you need, I am afraid. It sounds as though you are trying to create a parse tree from different tokens in your
String.
Get a pencil and paper and write out what you require: structure before and structure after. It appears each token acts as a binary operator in prefix notation. Have a look at my
post about parse trees and arities of operators only that was in postfix, so it is slightly different.
Then write down what you plan to implement (
not what you would like us to implement
) and let us see what we think of it.
But I still think that understanding the basic concept is the most important part of the process.
