How to split string to array where delimeter is also a token? For example, I have a string "var1 * var2 + var3" or "var1*var2+var3", and I want to split this string with delimeter "[\\+\\/\\+\\-]" such a way that the result will be a such array:
{"var1 ", "*", " var2 ", "+", " var3"} (or {"var1", "*", "var2", "+", "var3"})
How can I do this?
Use a delimiter that doesn't consume. Say hello to look-behinds and look-aheads, which assert but do not consume:
String array = str.split("(?<=[*+/-])|(?=[*+/-])"); The regex matches either immediately after, or immediately before, math operators.
Note also how you don't need to escape the math operators when inside a character class.
Practically, your delimiter should be the space or the blanks:
string.split("(\\b)+") This splits by blank spaces, so both the operators and variables end up in the resulting array.
Can't you just split by blank space?
String splittedString = string.split(" "); Also, same question here:
