Useful String functions length, charAt, concat, substring, equals, equalsIgnoreCase, compareTo, compareToIgnoreCase, startsWith, endsWith, indexOf, lastIndexOf. these are not static methods - …

The method charAt(int index) returns an individual char from inside a string. The valid index numbers are in the range 0..length-1. Using an index number outside of that range will raise a runtime exception …

String data type for huge strings.・Are you sure charAt() and length() take constant time?・If lots of calls to charAt(), overhead for function calls is large.・If lots of small strings, memory overhead of …

•charAt(): A String behaves a lot like an array of characters. But it isn’t an array, and so we’ve never been able to use the usual array syntax, such as square brackets to access individual characters. …

Description The java.lang.String.charAt method returns the char value at the specified index. An index ranges from 0 to length - 1. The first char value of the sequence is at index 0, the next at index 1, …

Returns a new string that concatenates this string with string s1. Returns a new string with all letters in uppercase. Returns a new string with all letters in lowercase. Returns a new string with whitespace …

whenever we detect a mismatch, we already know some of the characters in the text (since they matched the pattern characters prior to the mismatch). We can take advantage of this information to …