string - Recursion and substrings in Java -

string - Recursion and substrings in Java -

how create recursive method

getsubstrings("abc")

which returns list of possible substrings of string e.g.

{ "a", "b", "c", "ab", "bc", "ac", "abc" }

the first step write downwards clear , verifiable spec function, , perchance avoid giving illustration output contradicts spec. without first step, can't proceed.

java string recursion substring