Working with packages

Question

I have two classes within a same directory (directory name is myPackage), but one using package statement as:
package myPackage;
other file doesn't. The codes are as follows:
* file: myPackage\A.java
public class A{
     public void call(){
* file: myPackage\B.java
package myPackage;
public class B{
        public static void main(String[] args){
          A a = new A();
{code}
When compiles B.java it successfully compiles.
javac myPackage\B.java
But when try to invoke call method of A, the compilation fails. Here I'm confused wonder why can not be invoked if you can create an instance. Please reply if some one knows this issue.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

Answer 1

* file: myPackage\A.java
public class A{
     public void call(){
* file: myPackage\B.java
package myPackage;
public class B{
public static void main(String[] args){
          A a = new A();
When compiles B.java it successfully compiles.
javac myPackage\B.javaI doubt that B.java successfully compiles base on the code structure above.
B here is assuming to instantiate myPackage.A