accessability about protected instances

[Storm Zcm]

package pack;

public class Pack {
static public int x1 = 7;
protected int x2 = 8;//#1
static int x3 = 9;
static private int x4 = 10;
}

import pack.Pack;

public class Test extends Pack {
Test(){
try{
throw new RuntimeException();
}finally{
System.out.println("runtime");
}
}
public static void main(String[] args){
Pack p = new Pack();
System.out.println(p.x2);
}
}

why #1 x2 can be accessed?
if you delete "static" modifier,then x2 is invisible?
can someone explain why?
thank you in advance^^

[christian combarel]

Hi,
When the subclass is in another package, it can only see a protected member through inheritance. You can't use a reference to access it.

[Storm Zcm]

Thank you for reply.I know than you can't use a reference of the protected instance if they are not in the same package.
What i means is that if you place "static" modifier before "protected",you can use a reference of the protected instance.
What's the reason?