Primitive Data Types: Part 1

So far we have seen nine different examples, most of which have been integer values. We have also noticed one key thing at the time of declaring a variable, we write it like this: int speed = 0;.

This means we need to specify what type of variable it is. Stating the variable’s type and the name is essential because Java is statically-typed. This means that all variables should be declared before you can use it.

By naming and declaring a variable we actually declare the state of an object. In a Car class, when we declare a variable speed, our program knows that a field exists and that the field holds numerical data. It also has an initial value, such as 0 or 1.

The data type of a variable tells ...