Difference between Primitive and Reference data types.

Primitive data types: Primitive data types are the basic data types that are built into the Java language. Primitive data types are simple and hold a single value at a time, and they are stored in the memory stack. When you create a variable of a primitive data type, the variable stores the value itself, rather than a reference to an object containing the value. The primitive data types in Java include:

boolean: represents a true or false value

byte: represents an 8-bit signed integer value

short: represents a 16-bit signed integer value

int: represents a 32-bit signed integer value

long: represents a 64-bit signed integer value

float: represents a 32-bit floating-point value

double: represents a 64-bit floating-point value

char: represents a single 16-bit Unicode character

Here's an example of creating and initializing variables of primitive types in Java:

Reference data types: Reference types, on the other hand, are more complex and represent objects rather than simple values. When you create a variable of a reference type, the variable stores a reference (a memory address) to an object containing the value. Reference data types are also called non primitive data types.

Reference types include:

Strings: used to represent a sequence of characters

Arrays: used to represent a collection of values of the same data type

Classes: used to represent user-defined types

Here's an example of creating and initializing variables of reference types in Java: