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 …

Returns this string’s substring that begins with the character at the specified beginIndex and extends to the end of the string. Returns this string’s substring that begins at the specified beginIndex and …

To represent a string of characters, use the data type called String. For example, String is actually a predefined class in the Java library just like the System class and Scanner class. The String type is …

The key observation is that the characters in the text that would need to be rescanned are precisely pat.charAt(1) through pat.charAt(j-1): we drop the first character to shift right one position and the …

Libraries can be include on the command line using -l lib or in files with #use <lib>. The latter is recommended to make source files less de-pendent on context. Each library will be loaded at most …

•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. …