Introduction to Programming

Types

Java is a strongly typed language, which means that any variable declaration must include its type. Type limits the value a variable can hold and how this value can be passed around.

All types in Java are divided into two categories:

• Primitive types: Described in the Primitive types and literals section
• Reference types: Described in the Reference types and String section 

Some of the reference types require more attention, either because of their complexity or other particulars that have to be explained to avoid future confusion:

• Arrays: Described in the Arrays section
• String (the uppercase first character indicates it is the name of a class): Described in the Reference types and String section 
• Enum types: Described in the Enum ...