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2. Interface (object-oriented programming) - Wikipedia

   en.wikipedia.org/wiki/Interface_(object-oriented...

   For example, in Java, the Comparable interface specifies a method compareTo() which implementing classes must implement. This means that a sorting method, for example, can sort a collection of any objects of types which implement the Comparable interface, without having to know anything about the inner nature of the class (except that two of ...

3. Object-oriented programming - Wikipedia

   en.wikipedia.org/wiki/Object-oriented_programming

   Object-oriented programming (OOP) is a programming paradigm based on the concept of objects, [1] which can contain data and code: data in the form of fields (often known as attributes or properties), and code in the form of procedures (often known as methods).

4. Method (computer programming) - Wikipedia

   en.wikipedia.org/wiki/Method_(computer_programming)

   A method in Java programming sets the behavior of a class object. For example, an object can send an area message to another object and the appropriate formula is invoked whether the receiving object is a rectangle , circle , triangle , etc.

5. Java (programming language) - Wikipedia

   en.wikipedia.org/wiki/Java_(programming_language)

   Java is a high-level, class-based, object-oriented programming language that is designed to have as few implementation dependencies as possible. It is a general-purpose programming language intended to let programmers write once, run anywhere (), [16] meaning that compiled Java code can run on all platforms that support Java without the need to recompile. [17]

6. Class (computer programming) - Wikipedia

   en.wikipedia.org/wiki/Class_(computer_programming)

   However, it is a common practice when extending a Java framework to implement classes in the same package as a framework class to access protected members. The source file may exist in a completely different location, and may be deployed to a different .jar file, yet still be in the same logical path as far as the JVM is concerned.

7. Interface (Java) - Wikipedia

   en.wikipedia.org/wiki/Interface_(Java)

   An interface in the Java programming language is an abstract type that is used to declare a behavior that classes must implement. They are similar to protocols.Interfaces are declared using the interface keyword, and may only contain method signature and constant declarations (variable declarations that are declared to be both static and final).

8. Functional programming - Wikipedia

   en.wikipedia.org/wiki/Functional_programming

   A number of concepts [57] and paradigms are specific to functional programming, and generally foreign to imperative programming (including object-oriented programming). However, programming languages often cater to several programming paradigms, so programmers using "mostly imperative" languages may have utilized some of these concepts. [58]

9. Java syntax - Wikipedia

   en.wikipedia.org/wiki/Java_syntax

   A snippet of Java code with keywords highlighted in bold blue font. The syntax of Java is the set of rules defining how a Java program is written and interpreted. The syntax is mostly derived from C and C++. Unlike C++, Java has no global functions or variables, but has data members which are also regarded as global variables.