question for package ???

Question

Here's what I did:
  1. under c:\xxx, create the following directories and files:
      pa\
        a\
          A.java
            package pa.a;
            public class A {
               public void say() {
                  System.out.println("aaa");
               }
            }
        b\
          B.java
             package pa.b;
             import pa.a.*;
             
             public class B {
                public static void main(String[] args) {
                   new A().say();
                   System.out.println("bbb");
                }
             }
  2. c:\xxx>javac -d . -classpath . pa/b/B.java
  3. c:\xxx>java pa.b.B
  
  I don't have any classpath setting.

Answer 1

我错就错在加package 声明之后，完整的class 名叫hellojava.b.Foreign