List all data types in Java and Kotlin.

Java:

• Primitive types:
  • byte (8 bits, integer from -128 to 127)
  • short (16 bits, integer from -32,768 to 32,767)
  • int (32 bits, integer)
  • long (64 bits, integer)
  • float (32 bits, floating-point number)
  • double (64 bits, floating-point number)
  • boolean (logical value true/false)
  • char (16 bits, a Unicode character)
• Reference types:
  • Classes (e.g., String, user-defined classes)
  • Interfaces
  • Arrays

Kotlin:

• Numbers (all are objects):
  • Byte
  • Short
  • Int
  • Long
  • Float
  • Double
• Boolean: Boolean
• Character: Char
• String: String
• Arrays: Array<Type>, ByteArray, ShortArray, etc.
• Collections: List, Set, Map, etc.
• Special types:
  • Unit (analogous to void in Java)
  • Nothing (indicates that the function never returns)
  • Any (analogous to Object in Java, the most general supertype)