Java Programming for Complete Beginners - Java 16 - Java Tip 14 - Why Enum and Enum Basics - Ordinal and Values

The video tutorial introduces Java Enums, explaining their purpose and how they help restrict values to a predefined set. It covers creating and using Enums, including utility methods like 'valueOf' and 'ordinal'. The tutorial also discusses the implications of storing Enums in databases and advises against using ordinals for this purpose due to potential issues with value changes.

What does 'Enum' stand for in Java?

• Enumeration

• Enumerating

• Enumerate

• Enumerated

Why are Enums preferred over strings for representing constants?

• Enums allow restricting values to a predefined set

• Enums are easier to read

• Enums take less memory

• Enums are faster to process

How do you define an Enum in Java?

• Using the 'class' keyword

• Using the 'enum' keyword

• Using the 'struct' keyword

• Using the 'interface' keyword

Which method is used to convert a string to an Enum constant?

• Enum.convert()

• Enum.parse()

• Enum.valueOf()

• Enum.toString()

What is the 'ordinal' method used for in Enums?

• To get the name of the Enum constant

• To compare two Enum constants

• To get the position of the Enum constant

• To convert the Enum to a string

Why is it not recommended to store Enums using ordinals in a database?

• Ordinals can change if the Enum order changes

• Ordinals take more space

• Ordinals are difficult to retrieve

• Ordinals are not unique

Which method returns all the constants of an Enum?

• Enum.constants()

• Enum.all()

• Enum.list()

• Enum.values()