Java has eight built-in data types, referred to as the Java primitive types.

boolean

Type: true or false

Example:

boolean isJavaFun = true;
boolean isFishTasty = false;
System.out.println(isJavaFun);     // Outputs true
System.out.println(isFishTasty);   // Outputs false

byte

Type: 8-bit integral value

Example:

byte myNum = 100;
System.out.println(myNum);

short

Type: 16-bit integral value

Example:

short myNum = 5000;
System.out.println(myNum);

int

Type: 32-bit integral value

Example:

int myNum = 123;
System.out.println(myNum);

long

Type: 64-bit integral value 123L

Example:

long myNum = 123L;
System.out.println(myNum);

float

Type: 32-bit floating-point value 123.45f

Example:

float myNum = 123.45f;
System.out.println(myNum);

double

Type: 64-bit floating-point value

Example:

double myNum = 123.456d;
System.out.println(myNum);

char

Type: 16-bit Unicode value

Example:

char myChar = 'z';
System.out.println(myGrade);

A primitive is not an object in Java nor does it represent an object. A primitive is just a single value in memory, such as a number or character.