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Command-line argument parsing is the process of analyzing and handling command-line input provided to a program.
In computer programming, a usage message or help message is a brief message displayed by a program that utilizes a command-line interface for execution. This message usually consists of the correct command line usage for the program and includes a list of the correct command-line arguments or options acceptable to said program.
file.s is a command-line argument which tells the program rm to remove the file named file.s. Some programming languages, such as C, C++ and Java, allow a program to interpret the command-line arguments by handling them as string parameters in the main function.
Command-line arguments are passed in args. As in C and C++, the name "main()" is special. Java's main methods do not return a value directly, but one can be passed by using the System.exit() method. Unlike C, the name of the program is not included in args, because it is the name of the class that contains the main method, so it is already ...
An input argument (the argument to an input parameter) must be a value, such as an initialized variable or literal, and must not be redefined or assigned to; an output argument must be an assignable variable, but it need not be initialized, any existing value is not accessible, and must be assigned a value; and an input/output argument must be ...
Command Object, routed event arguments, event object: the object that is passed from the source to the Command/Action object, to the Target object to the code that does the work. Each button click or shortcut key results in a new command/event object.
Not all programs require stream input. For example, the dir and ls programs (which display file names contained in a directory) may take command-line arguments, but perform their operations without any stream data input. Unless redirected, standard input is inherited from the parent process.
ExpectIt — a pure Java 1.6+ implementation of the Expect tool. It is designed to be simple, easy to use and extensible. expect4j — an attempt at a Java clone of the original Expect; ExpectJ — a Java implementation of the Unix expect utility; Expect-for-Java — pure Java implementation of the Expect tool