Keywords in Java

Keyword in Java

What is Keyword in Java?
Key + word means a word having crucial importance. In Java programming language keywords are reserved words having predefined meaning.

  • There are total 50 keywords in Java.
  • These words are nothing but 50 character sequences, formed from ASCII letters, are reserved for use as keywords.
  • These keywords can not be used as identifiers.


abstract continue for new switch
assert default if package synchronized
boolean do goto private this
break double implements protected throw
byte else import public throws
case enum instanceof return transient
catch extends int short try
char final interface static void
class finally long strictfp volatile
const float native super while
  • The keywords const and goto are reserved, even though they are not currently used. This may allow a Java compiler to produce better error messages if these C++ keywords incorrectly appear in programs.
  • true, false, and null might seem like keywords, but they are actually literals; you cannot use them as identifiers in your programs.

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