OOP in Java

Access Modifiers in Java

  1. Default – No keyword required

  2. Private

  3. Protected

  4. Public

Source: Access Modifiers in Java

Non-access modifiers


By convention, type parameter names are single, uppercase letters. This stands in sharp contrast to the variable naming conventions that you already know about, and with good reason: Without this convention, it would be difficult to tell the difference between a type variable and an ordinary class or interface name.

The most commonly used type parameter names are:

  • E - Element (used extensively by the Java Collections Framework)

  • K - Key

  • N - Number

  • T - Type

  • V - Value

  • S,U,V etc. - 2nd, 3rd, 4th types

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