Call the Java String length() method; Hold the value of the String length in a variable for future use; Java String length method() The Java String class contains a length() method that returns the ...

You are given a string num representing a large integer. An integer is good if it meets the following conditions: It is a substring of num with length 3. It consists of only one unique digit. Return ...

First Unique Character in a String.java. ... Given a string, find the first non-repeating character in it and return it's index. If it doesn't exist, return -1. Examples: s = "leetcode" return 0. s = ...