课程: Java Object-Oriented Programming

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Challenge: Reduce complexity with polymorphism

Challenge: Reduce complexity with polymorphism - Java教程

课程: Java Object-Oriented Programming

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Challenge: Reduce complexity with polymorphism

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(upbeat music) - [Instructor] Let's practice leveraging polymorphism in Java to reduce application complexity. Let's say you want to add a series of contacts to your phone. For some contacts, you have a name, phone number and email. For others, you just have a name and phone number. There are also a few where you only have a name and an email address. In this challenge, you'll create a program that allows you to create contact instances in a variety of ways. After creating a contact instance, you should print it out to the console. In the printout, display the information about the contact. Good luck and have fun.

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