e-Commerce Applications Using Oracle8i and Java from Scratch

Java Datatypes

Java has several types of data with which it can deal. They are placed into two categories: Primitive types and reference types.

Primitive Java Types

Java provides eight primitive data types that can be used to store data. These types are boolean, byte, short, int, long, char, float, and double.

Boolean

Boolean data types are the simplest form of datatypes. Variables of this type can store two possible values: true or false. Boolean variables are generally used to store information that is binary. For example, a product can be available or not available.

boolean coffee_available = true;

The previous example sets a boolean variable to true.

Integer

Integer data can be stored in several types based on the value you are attempting ...