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The marker interface pattern is a design pattern in computer science, used with languages that provide run-time type information about objects. It provides a means to associate metadata with a class where the language does not have explicit support for such metadata.
A design marker is a marker interface used to document a design choice. In Java programs the design choice is documented in the marker interface's Javadoc documentation. Many choices made at software design time cannot be directly expressed in today's implementation languages like C# and Java.
nested block structure: code sequences and associated declarations could be grouped into blocks without having to be turned into separate, explicitly named procedures; lexical scoping : a block could have its own private variables, procedures and functions, invisible to code outside that block, that is, information hiding .
The implementation started when Sun began releasing the Java source code under the GPL. As of Java SE 7, OpenJDK is the official Java reference implementation. The goal of Java is to make all implementations of Java compatible. Historically, Sun's trademark license for usage of the Java brand insists that all implementations be compatible.
Short Code 1951 Boehm unnamed coding system Corrado Böhm: CPC Coding scheme 1951 Klammerausdrücke Konrad Zuse: Plankalkül 1951 Stanislaus (Notation) Fritz Bauer: none (unique language) 1951 Sort Merge Generator: Betty Holberton: none (unique language) 1952 Short Code (for UNIVAC II) Albert B. Tonik, [2] J. R. Logan Short Code (for UNIVAC I ...
This is a list of the instructions that make up the Java bytecode, an abstract machine language that is ultimately executed by the Java virtual machine. [1] The Java bytecode is generated from languages running on the Java Platform, most notably the Java programming language.
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Java compilers do not enforce these rules, but failing to follow them may result in confusion and erroneous code. For example, widget.expand() and Widget.expand() imply significantly different behaviours: widget.expand() implies an invocation to method expand() in an instance named widget , whereas Widget.expand() implies an invocation to ...