Why does the following give compilation error at line 1.
Class B extends Class A which is in a different package.
//in file A.java
package p1;
public class A
{
protected int i = 10;
public int getI() { return i; }
}
//in file B.java
package p2;
import p1.*;
public class B extends p1.A
{
public void process(A a)
{
a.i = a.i*2; // line 1
}
public static void main(
String[] args)
{
A a = new B();
B b = new B();
b.process(a);
System.out.println(a.getI());
}
}