单项选择题 Given: What is the result？（）

单项选择题 Given a correctly compiled class whose source code is： Assume that the class file is located in /foo/com/sun/sjcp/， the current directory is /foo/， and that theclasspath contains "." （current directory）. Which command line correctly runs Commander？（）

单项选择题 A class games.cards.Poker is correctly defined in the jar file Poker.jar. A user wants to execute the main method of Poker on a UNIX system using the command：java games.cards. Poker What allows the user to do this？（）