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The Java™ Tutorials
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Classes and Objects
Classes
Declaring Classes
Declaring Member Variables
Defining Methods
Providing Constructors for Your Classes
Passing Information to a Method or a Constructor
Objects
Creating Objects
Using Objects
More on Classes
Returning a Value from a Method
Using the this Keyword
Controlling Access to Members of a Class
Understanding Class Members
Initializing Fields
Summary of Creating and Using Classes and Objects
Questions and Exercises
Questions and Exercises
Nested Classes
Inner Class Example
Local Classes
Anonymous Classes
Lambda Expressions
Method References
When to Use Nested Classes, Local Classes, Anonymous Classes, and Lambda Expressions
Questions and Exercises
Enum Types
Questions and Exercises
Trail: Learning the Java Language
Lesson: Classes and Objects
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Questions and Exercises: Enum Types

Questions

  1. True or false: an Enum type can be a subclass of java.lang.String.

Exercises

  1. Rewrite the class Card from the exercise in Questions and Exercises: Classes so that it represents the rank and suit of a card with enum types.

  2. Rewrite the Deck class.

Check your answers.

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