Primitives
primitives are the most basic values in java. There are 8 types of primitives: boolean, char, int, byte, shot, long, float, and double.
For the most part, we will only be using 3 of these primitives: int, double, and boolean.
Integers¶
The int keyword is used for integers, which are all positive and negative whole numbers, including zero. Some examples of integers are -1, 1, and 0.
Doubles¶
The double keyword is used for decimals, which are all numbers, positive or negative. Some examples of decimals are 16.2, 0.01, -2.3, and 1.0. Notice how an integer (1) can also be stored as a double (1.0).
Booleans¶
The boolean keyword is used to represent true and false statements. Booleans only have two states, true and false. Some examples of booleans are true and false.
Strings: The Fake Primitive¶
The String keyword is used to represent a collection of characters, or a word. Strings are used similarly to primitives, but unlike primitives, Strings are objects with methods inside them. Some examples of Strings are "hi" and "a"
How to Use primitives¶
The main differences between primitives and objects is how they are created. primitives don't need to be created via a constructor. Instead they can just be assigned a value.