28.8. Passing an Object of a User-Defined Type to a Web Service

The web methods we’ve demonstrated so far each receive and return only primitive values or Strings. Web services also can receive and return objects of user-defined types—known as custom types. This section presents an EquationGenerator web service that generates random arithmetic questions of type Equation. The client is a math-tutoring desktop application in which the user selects the type of mathematical question to attempt (addition, subtraction or multiplication) and the skill level of the user—level 1 uses one-digit numbers in each question, level 2 uses two-digit numbers and level 3 uses three-digit numbers. The client passes this information to the web service, which then ...

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