Apex Developer Guide

Getting Started
Writing Apex
Data Types and Variables
Control Flow Statements
Classes, Objects, and Interfaces
Understanding Classes
Apex Class Definition
Class Variables
Class Methods
Using Constructors
Access Modifiers
Static and Instance Methods, Variables, and Initialization Code
Apex Properties
Extending a Class
Extended Class Example
Understanding Interfaces
Keywords
Annotations
Classes and Casting
Differences Between Apex Classes and Java Classes
Class Definition Creation
Namespace Prefix
Apex Code Versions
Lists of Custom Types and Sorting
Using Custom Types in Map Keys and Sets
Working with Data in Apex
Ways to Invoke Apex
Finishing Touches
Reference
Appendices
Glossary
PDF

Newer Version Available

This content describes an older version of this product. View Latest

Class Variables

To declare a variable, specify the following:
  • Optional: Modifiers, such as public or final, as well as static.
  • Required: The data type of the variable, such as String or Boolean.
  • Required: The name of the variable.
  • Optional: The value of the variable.
Use the following syntax when defining a variable:
For example: