Can you list the main groups of data types used in Java?

In Java, the main groups of data types are divided into two categories:

1. Primitive 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)

2. Reference types:

   • Classes (e.g., String, user-defined classes)
   • Interfaces
   • Arrays

Primitive types store values directly, while reference types contain references to objects in memory.