package pak1;
import pak2.B;
public class A {
	void doAThings() {
		System.out.print("A ");
	}
	
	public static void main(String[] args) {
		A a = new B();
		a.doAThings();
	}
}

package pak2;
import pak1.A;
public class B extends A {
	public void doAThings() {
		System.out.println("I'm B ;)");
	}
}