Java is a German-style board game designed by Wolfgang Kramer and Michael Kiesling and published in 2000 by Ravensburger in German and by Rio Grande Games in English.
 It is illustrated by Franz Vohwinkel.
Xtend is a general-purpose high-level programming language for the Java Virtual Machine.
 Syntactically and semantically Xtend has its roots in the Java programming language but focuses on a more concise syntax and some additional functionality such as type inference, extension methods, and operator overloading.
 Being primarily an object-oriented language, it also integrates features known from functional programming, e.g. lambda expressions.
 Xtend is statically typed and uses Java's type system without modifications.
 It is compiled to Java code and thereby seamlessly integrates with all existing Java libraries.
Deterministic Parallel Java (DPJ) is an extension of the Java programming language which adds parallel constructs that provide a deterministic programming model for object-oriented languages.
 The language extensions define a type system that a programmer (or interactive porting tool) can use to annotate Java code with type information, and a compiler can use to type-check that a DPJ program has deterministic semantics, i.e., produces the same visible output for a given input, in all executions.
 Parallel algorithms that cannot be expressed entirely in the statically checked type system require run-time mechanisms to enforce determinism: two key research goals are to make the type system more expressive and to minimize the need to fall back to run-time techniques.
 With minor modifications, language extensions should be applicable to other base OO languages, such as C++ and C#.
In computing, a plug-in (or plugin, add-in, addin, add-on, addon, or extension) is a software component that adds a specific feature to an existing computer program.
 When a program supports plug-ins, it enables customization.
 The common examples are the plug-ins used in web browsers to add new features such as search-engines, virus scanners, or the ability to use a new file type such as a new video format.
 Well-known browser plug-ins include the Adobe Flash Player, the QuickTime Player, and the Java plug-in, which can launch a user-activated Java applet on a web page to its execution on a local Java virtual machine.
JSBML (Java Systems Biology Markup Language) is an open-source Java™ (API) for the SBML (Systems Biology Markup Language ) format.
 Its API strives to attain a strong similarity to the Java binding of the corresponding library libSBML, but is entirely implemented in Java and therefore platform independent.
 JSBML provides an elaborated abstract type hierarchy, whose data types implement or extend many interfaces and abstract classes from the standard Java library.
 In this way, JSBML integrates smoothly into existing Java projects, and provides methods to read, write, evaluate, and manipulate the content of SBML documents.
Generics are a facility of generic programming that were added to the Java programming language in 2004 within version J2SE 5.0.
 They were designed to extend Java's type system to allow “a type or method to operate on objects of various types while providing compile-time type safety”.
 The aspect "compile-time type safety" was not fully achieved, since it was shown in 2016 that it is not guaranteed in all cases.
ESC/Java (and more recently ESC/Java2), the "Extended Static Checker for Java," is a programming tool that attempts to find common run-time errors in Java programs at compile time.
 The underlying approach used in ESC/Java is referred to as extended static checking, which is a collective name referring to a range of techniques for statically checking the correctness of various program constraints.
 For example, that an integer variable is greater-than-zero, or lies between the bounds of an array.
 This technique was pioneered in ESC/Java (and its predecessor, ESC/Modula-3) and can be thought of as an extended form of type checking.
 Extended static checking usually involves the use of an automated theorem prover and, in ESC/Java, the Simplify theorem prover was used.
A luwuk is a type of short sword from the island of Java.
 This sword is found mostly in East Java and Central Java.
 It is said that this sword was named Luwuk because it was created by an Empu (Indonesian Bladesmith) named Ki Luwuk.
 This sword was believed to have magic power because it was made with a special ritual, and has existed since the Majapahit era.
 The Luwuk is listed as one of the deadliest weapons from the Paregreg war.
 During that era, only those in the nobility or in the warrior class were permitted to use a luwuk.
An interface in the Java programming language is an abstract type that is used to specify a behaviour that classes must implement.
 They are similar to protocols. Interfaces are declared using the codice_1 keyword, and may only contain method signature and constant declarations (variable declarations that are declared to be both codice_2 and codice_3).
 All methods of an Interface do not contain implementation (method bodies) as of all versions below Java 8.
 Starting with Java 8, codice_4 and codice_5 methods may have implementation in the codice_1 definition.
Twister is a game of physical skill, produced by Milton Bradley Company and Winning Moves, that has been inducted into the American National Toy Hall of Fame.
 It is played on a large plastic mat that is spread on the floor or ground.
 The mat has six rows of large colored circles on it with a different color in each row: red, yellow, green, and blue.
 A spinner is attached to a square board and is used to determine where the player has to put their hand or foot.
 The spinner is divided into four labeled sections: left foot, right foot, left hand, and right hand.
 Each of those four sections is divided into the four colors (red, yellow, green, and blue).
 After spinning, the combination is called (for example: "right hand yellow") and players must move their matching hand or foot to a circle of the correct color.

Question: Java and Twister, are what type of entertainment?
Answer: game