Java Keywords

Java Keywords

Some identifiers are reserved in Java which has separate functionality and meaning such type of reserved identifiers are called reserved words/Java Keywords and these cannot be used as identifiers in java.

53 Keywords/Reserved words are there in java
50 are keywords-----------48 used keywords, 2 unused keywords (goto, const)
3 reserved literals---------- true,  false, null

Keywords for primitive data types(8)

1)byte 2)short 3)int 4)long 5)float 6)double  7)char 8) Boolean

Keywords for flow control(11)

1) if 2) else 3) switch 4)case 5)default 6)for

7) do 8) while 9) break 10) continue 11) return

Keywords for Exception Handling(6)

1)try 2)catch 3)finally 4)throw 5)throws 6)assert

Keywords for modifiers(11)

1)public 2)private 3)protected 4)static 5)abstract 6)strictfp 7)final 8)transient 9)native 10)volatile 11)synchronized

Class related key words(6)

1)class 2)interface 3)package 4)extends 5)implements 6)import

Object related key words(5)

1)new 2)instanceof 3)super 4)this

Other(1)

1)Void

Unused keywords(2)

1)const 2)goto

Reserved literals(3)

1)true 2)false 3)null

New key words in j2SE 1.5(1)

1)enum

All the key words contains only lower case alphabet symbols