Java`s Reserved Words
when you are writing java code, you should know that java reserves certain words for itself as part of the java language. There aren`t too many of them, though. Here they are;
- abstract – It specifies that the class or method will be implemented later, in a subclass.
- boolean – A data type that can hold true and false values only.
- break – A control statement for breaking out of loops.
- byte – A data type that can hold 8-bit data types.
- byvalue – It is resetrved for future use.
- case – It is used in switch statement to mark blocks of text.
- cast – It is reserved for future use.
- catch – It catches exceptions generated by try statement.
- class – It declares a new class.
- char – A data types that can hold unsigned 16-bit unicode characters.
- const – It is reserved for future use.
- continue – It sends control pack outside a loop.
- default – It specifies the default block of code in a switch statement.
- do – It starts do-while loop.
- double – A data type that can hold 64-bit floating-point value.
- else – It indicates alternative branches in an if statement.
- extends – It indicates that a class is derived from another class or an interface is derived from another interfaces.
- final – It indicates that a variable holds a constant value or that a method will not be overridden.
- finally – It indicates a block of code in a try-catch structure that will always be executed.
- float – A data type that holds a 32-bit floating-point value.
- for – It is used to start a for loop.
- future – it is reserved for future use.
- generic – it is reserved for future use.
- goto – it is reserved for future use.
- if – It tests a true/false expression and branches accordingly.
- implements – it specifies that a class implements an interfaces.
- import – it references other class.
- inner – it reserved for future use.
- instanceof – it indicates whether an objects is an instance of a specific class or implements a specific interface.
- int – A data type that hold a 32-bit signed integer.
- interface – it declare an interfaces.
- long – A data types that holds a 64-bit integer.
- native – it specifies that a method is implemented with native code.
- new – it creates new objects.
- null – it indicates that a reference does not refer to anything.
- operator – it is reserved for future use.
- outer – it is reserved for future use.
- packages – it declares a java package.
- private – An access specifier indicating that a method or variable may be accessed only in the class it`s declared in
- protected – An access specifier indicating that a method or variable may only be accessed in the class it`s declared in
- public – An access specifier used for classes, interfaces, methods, and variable indicating that an item is accessible throughout the application
- rest – it is reserved for future use.
- return – it sends control and possibly a return value back from a called method.
- short – A data types that can hold a 16-bit integer.
- static – it indicates that a variable or method is a class method
- super – it refers to a class`s base class
- switch – A statement that executes code based on a test value.
- this – it refers to the current object in a method or constructor.
- synchronized – it specifies critical sections or methods in multithreaded code.
- throw – it creates an exception.
- throws – it indicates what exception.
- transient – it specifies that a variable is not part of an object`s persistent state.
- try – it starts a block of code that will be tested for exceptions.
- var – it is reserved for future use.
- void – it specifies that a method does not have a return value.
- volatile – it includes that a variable may change asynchronously.
- while – it starts a while loop.
