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2. Method (computer programming) - Wikipedia

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

   A method in object-oriented programming (OOP) is a procedure associated with an object, and generally also a message. An object consists of state data and behavior; these compose an interface, which specifies how the object may be used. A method is a behavior of an object parametrized by a user.

3. List of Java keywords - Wikipedia

   en.wikipedia.org/wiki/List_of_Java_keywords

   Added in Java 9, the underscore has become a keyword and cannot be used as a variable name anymore. [3] abstract A method with no definition must be declared as abstract and the class containing it must be declared as abstract. Abstract classes cannot be instantiated. Abstract methods must be implemented in the sub classes.

4. 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.

5. Method chaining - Wikipedia

   en.wikipedia.org/wiki/Method_chaining

   Method chaining is a common syntax for invoking multiple method calls in object-oriented programming languages. Each method returns an object, allowing the calls to be chained together in a single statement without requiring variables to store the intermediate results.

6. 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).

7. Static import - Wikipedia

   en.wikipedia.org/wiki/Static_import

   Static import is a feature introduced in the Java programming language that allows members (fields and methods) which have been scoped within their container class as public static, to be used in Java code without specifying the class in which the field has been defined.

8. Helper class - Wikipedia

   en.wikipedia.org/wiki/Helper_class

   Functions which are going to be helper classes could be placed close to where they are used. The other alternative is wrapping helper class parameters into a class as a field. That class can have a name from the business domain connected to the fields it has. The example below shows how to convert helper methods to methods on domain types:

9. clone (Java method) - Wikipedia

   en.wikipedia.org/wiki/Clone_(Java_method)

   clone() is a method in the Java programming language for object duplication. In Java, objects are manipulated through reference variables, and there is no operator for copying an object—the assignment operator duplicates the reference, not the object. The clone() method provides this missing functionality.