OCA Java SE 8 Programmer I Certification Guide

Chapter 2. Working with Java data types

Exam objectives covered in this chapter	What you need to know
[2.2] Differentiate between object reference variables and primitive variables.	The primitive data types in Java, including scenarios when a particular primitive data type should or can’t be used. Similarities and differences between the primitive data types. Similarities and differences between primitive and object reference variables.
[2.1] Declare and initialize variables (including casting of primitive data types).	Declaration and initialization of primitives and object reference variables. Literal values for primitive and object reference variables.
[2.5] Develop code that uses wrapper classes such as Boolean, Double, ...