Can you list the main data types used in Java?

In Java, there are two main types of data: primitive and reference types.

Primitive data types:

• byte — 8-bit integer
• short — 16-bit integer
• int — 32-bit integer
• long — 64-bit integer
• float — 32-bit floating-point number
• double — 64-bit floating-point number
• char — 16-bit Unicode character
• boolean — logical type (true/false)

Reference data types include objects and arrays, for example:

• Classes (e.g., String, Integer, custom classes)
• Arrays

Example of using primitive and reference types:

int number = 10;
String text = "Hello";
boolean flag = true;