object-oriented – TheoryApp

Interfaces in Java

By theoryapp Posted on November 19, 2020 Posted in Java Tagged with abstract class, generic type, interface, object-oriented, polymorphism

An interface in Java represents an abstract type; it is a collection of abstract methods and constants. All methods in an interface are abstract, and thus they have only signatures. All variables in an interface are implicitly final and static, …

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There are two meanings of “class”. A class could be: a code library (a collection of methods). For example, java.lang.Math contains methods for performing basic numeric operations. an object data type (a description of a concept). For example, java.lang.String represents …

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Tag: object-oriented

Interfaces in Java

Writing Classes in Java