inheritance failure in same package

Hi,

I've tried to write a package and two classes this way:

<path>/pack/Aclass.java

Java Code:

package pack;
public class Aclass<T> {
  private T t;

  public void set(T t) {
    this.t = t;
  }

  public T get() {
    return t;
  }
}

<path>/pack/Bclass.java

Java Code:

package pack;
public class Bclass<T> extends Aclass<T> {
}

In <path>/pack/ directory:

Java Code:

javac Aclass.java

Everything is OK.

Java Code:

javac Bclass.java 
Bclass.java:2: error: cannot find symbol
public class Bclass<T> extends Aclass<T> {
                                   ^
  symbol: class Aclass
1 error

This is not all. Some modification:

<path>/Bclass.java

Java Code:

public class Bclass<T> extends pack.Aclass<T> {
}

In <path>/ directory:

Java Code:

javac Bclass.java

Everything is OK.

What can I do, if I need these in same package?

Thanks in advance,

m