Problem Description

Create a Java library, suitable for use in a server-side application, that can take a Java int in the range 0 to 999,999,999 inclusive and returns the equivalent number, as a String, in British English words.

Sample Data

Input/Output

• 0 zero
• 1 one
• 21 twenty one
• 105 one hundred and five
• 123 one hundred and twenty three
• 1005 one thousand and five
• 1042 one thousand and forty two
• 1105 one thousand one hundred and five
• 56945781 fifty six million nine hundred and forty five thousand seven hundred and eighty one
• 999999999 nine hundred and ninety nine million nine hundred and ninety nine thousand nine hundredand ninety nine.

Guidelines

• The solution must be correct. Please pay attention to the specific conventions of British English, particularly concerning the use of ‘and’ between certain phrases.
• The solution is not expected to involve a command line or GUI application – We’re looking for an object-oriented Java library that could be packaged as a jar and used in a larger application.
• The solution should not make use of external libraries other than for testing purposes.
• The solution should demonstrate a candidate’s abilities as a software engineer including, for example, TDD principles, general object-oriented principles and domain modeling principles.
• Please submit a solution that captures the business domain for the problem