Understanding Package Declarations and Imports

// Location of classes needed to *compile* the program
// 以下两个是黏在一起的，相亲相爱
-cp <classpath> 
-classpath <classpath>
 
// 当class-path被拆散时，我们需要两个dash在前面
--class-path <classpath>
 
// Directory in which to place generated class files
-d <dir>

// Location of classes needed to *run* the program
-cp <classpath>
-classpath <classpath>
--class-path <classpath>