How to return the next indexOf after a previous?

Question

For example:

str = "(a+b)*(c+d)*(e+f)"
str.indexOf("(") = 0
str.lastIndexOf("(") = 12

How to get the index in second bracket? (c+d) <- this

Answer 1

int first  = str.indexOf("(");
int next = str.indexOf("(", first+1);

have a look at API Documentation