Hands-On Design Patterns with Java

The Conversion class

The Conversion class applies when there is conversion from numbers to letters (int to char). The class has a single String class variable and a constructor method that is passed to the user's input. The class has one additional method, the convertToCharacters() method. That method converts the user's input into a character array and then processes that array, one character at a time. The processing is implemented with a simple switch statement. Each numerical value, from 0 through 9, has a corresponding character. The characters are printed one at a time until the entire character array has been processed.

The first section of our Conversion class follows:

public class Conversion {    // class variable    public String userInput ...