#70 Enum Class in Java

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In this lecture we will learn:
– Inheritance with the enum
– Super class of enum
– Enum and Constructor
– Object creation in an enum
– Important points used in the enum

#1
– We can not extend the enum with any other class.
– We can define constructors and methods in an enum. Creation of our constructors and variables is also possible in an enum.
– We can also define our data types through enum that are known as Enumerated Data Types.
– In Java, enum extends the enum class and we get all other methods present inside an enum through the enum class only.
– If we print the superclass of an enum class, then it will also return an enum.
Status s= Status.Success;
System.out.println(s.getClass().getSuperclass());
– In an enum, every enum constant represents an object of type enum.

#2
Enum and Constructor:
– enum contains a constructor and it is executed separately for each enum constant at the time of enum class loading.
– We can create a constructor in an enum that can take any parameter, and that value of a parameter might be different in every object of an enum.
– Instance variables in an enum are private and we can access them in another class by using getters and setters.
– We can print the value of all objects of an enum through a loop and .values() method is used to iterating over all objects.
– If any parameterized constructor is present inside an enum, then the default constructor will not be considered.
– We create private variables and private constructors in an enum because we use them or create an object for constructors in the same class only.
– The constructor in an enum will be called the number of times as much the number of objects created.

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