Reserved Words

  

What are reserved ?

Some words are reserved to represent some meaningful functionality.

- cat

- fruit

- cow

- car

- sleep

Similarly in java, 

• If
• else
• for

How many words are reserved ?

    In java some words are reserved to represent either meaning or functionality, those words are called as reserved words.

There are 53 reserved words in java.

List of Reserved Java Keywords

Logical Grouping of Keywords

Unused Keywords

goto

    Usage of goto keyword created several problems in old languages like C, C++ etc., hence the use of goto keyword is banned in java.

const

    const was supposed to be used for constant, but we have final keyword for the same and hence const is also unused keyword now.

enum Keyword

An enum is a special "class" that represents a group of constants (unchangeable variables, like final variables).

Reserved Literals

true & false – values for Boolean data type

null – default value for object reference.