Which keyword is reserved but unused in java

C Programming. Control System. Data Mining. Data Warehouse. Javatpoint Services JavaTpoint offers too many high quality services. List of Java Keywords A list of Java keywords or reserved words are given below: abstract : Java abstract keyword is used to declare an abstract class.

An abstract class can provide the implementation of the interface. It can have abstract and non-abstract methods. It can hold True and False values only. It breaks the current flow of the program at specified conditions. It must be used after the try block only. It continues the current flow of the program and skips the remaining code at the specified condition. It can iterate a part of the program several times.

Enum constructors are always private or default. It is used with a variable. It is used to restrict the user from updating the value of the variable. This block is always executed whether an exception is handled or not.

If the number of iteration is fixed, it is recommended to use for loop. It executes the if block if the condition is true. It can have only abstract methods. It removes the garbage value. It is used to indicate that a method or variable may be accessed only in the class in which it is declared. It can be accessible within the package and outside the package but through inheritance only.

Packages in Java. Flow Control in Java. Loops in Java. Jump Statements in Java. Arrays in Java. Strings in Java. OOPS in Java. Constructors in Java. Interfaces in Java. Keywords in Java. Exception Handling in Java. Collection Framework.

A non-access modifier. Used for classes and methods: An abstract class cannot be used to create objects to access it, it must be inherited from another class. An abstract method can only be used in an abstract class, and it does not have a body. The body is provided by the subclass inherited from. Defines a constant. Not in use - use final instead. A non-access modifier used for classes, attributes and methods, which makes them non-changeable impossible to inherit or override.

Used with exceptions, a block of code that will be executed no matter if there is an exception or not. Specifies that a method is not implemented in the same Java source file but in another language. An access modifier used for attributes, methods and constructors, making them only accessible within the declared class.