类定义和分析参数的命令行和返回合并的结果

parse-cmd ParseCmd.java is a Java-class used to define and parse command-line parameters in a Java application. See ParseParms.scala for an equivalent implementation using Scala It facilitates the definition of parameters, each including the following values: * name * default value * regular-expression used for validation * error/help information * flag to indicate whether the named parameter is required; defaults to optional Here is a sample statement defining a required parameter, req(), named "-ifile", with a default value of "input.txt", and including a message should validation fail, msg(" ... ") .parm("-ifile", "input.txt").req().msg("enter a valid file name") Why Several Java-based command-line parsing solutions are available