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A sample UML class and sequence diagram for the Command design pattern. [3]In the above UML class diagram, the Invoker class doesn't implement a request directly. Instead, Invoker refers to the Command interface to perform a request (command.execute()), which makes the Invoker independent of how the request is performed.
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The terms foobar (/ ˈ f uː b ɑːr /), foo, bar, baz, qux, quux, [1] and others are used as metasyntactic variables and placeholder names in computer programming or computer-related documentation. [2] They have been used to name entities such as variables, functions, and commands whose exact identity is unimportant and serve only to ...
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.
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This software is a platform for lightweight Java applications, but also handles large scale websites. [25] JBoss EWS may be deployed as a standard enterprise web server, a simple Java application server, or an enterprise open source application infrastructure. [26] Key components: Apache Tomcat – including Java Servlet and JavaServer Pages
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In many programming languages, the vertical bar is used to designate the logic operation or, either bitwise or or logical or. Specifically, in C and other languages following C syntax conventions, such as C++ , Perl , Java and C# , a | b denotes a bitwise or ; whereas a double vertical bar a || b denotes a ( short-circuited ) logical or .