Chapter thorough erification of methods and classes

Main Skills and Concepts:

• Control access to members of a class.
• Pass objects to methods.
• Return objects from methods.
• Overloading methods and constructors.
• Use recursion.
• Apply the static keyword.
• Use internal classes.
• Use variable length arguments (varargs).

Chapter Content:
Member Access Control: Explanation about controlling access to public and private members in a class. Access to private members is restricted, preventing misuse of objects and ensuring safe object-oriented programming.

Encapsulation: Discussion of how encapsulation binds data to code and protects the inner workings of a class, creating a "black box" that can be used without outside interference.

Default Access Setting: Explanation that in simple examples, the default access setting is usually public, but this may be inappropriate in real-world situations, requiring the use of other access control features.

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