Give some features of Interface?
Java Programming Language > Interface in java > Introduction to Interface
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Answer:
In Java, some of the features of an interface include:
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Abstract methods: Interfaces can only contain abstract method declarations, and they cannot contain method implementations.
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No Constructors: Interfaces cannot contain constructor methods.
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100% abstraction: Interfaces are 100% abstract, which means that they only contain abstract methods and constants.
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Multiple inheritance: Interfaces allow multiple inheritance, which means that a class can implement more than one interface.
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Strong typing: Interfaces enforce strong typing, which means that variables declared as an interface type must only be assigned reference values that implement that interface.
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Accessibility: Interface methods are public by default and cannot be declared as private or protected.
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Constants: Interfaces can contain constant declarations, which are public, static, and final by default.
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Marker interfaces: An interface that does not contain any methods or constants is known as a marker interface, such as Serializable, Cloneable, and Remote.
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