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Java Reserved Words

 Java Reserved Words 


In java, some identifiers are reserved to associate some functionality or meaning such type of reserved identifiers is called reserved words.


> Reserved words for data types (8)
  1. byte
  2. short
  3. int
  4. long
  5. float
  6. char
  7. double
  8. boolean
> Reserved words 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 modifiers (11)

  1. public
  2. private
  3. protected
  4. static
  5. final
  6. abstract
  7. synchronized
  8. native
  9. strictfp (1.2 version)
  10. transient
  11. volatile
> Keywords for exception handling (6)
  1. try
  2. catch
  3. finally
  4. throw
  5. throws
  6. assert (1.4 version)
> Class related keywords (6)
  1. class
  2. package
  3. import
  4. extends
  5. implements
  6. interface
> Object related keywords (4)
  1. new
  2. super
  3. instanceof
  4. this
> Void return type keywords:

If a method won't return anything compulsory that method should be declared with the void return type in java but it is optional in C++
  1. void
> Unused keywords:
  1. goto: Create several problems in old languages and hence it is banned in java.
  2. const: Use final instead of this.
By mistake, if we are using these keywords in our program we will get a compile-time error.

> Reserved literals :
  1. true      values for boolean data type
  2. false
  3. null      default value for object reference
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