package abc;
class A {
protected int x;
protected void print() { System.out.println(x); }
}
package xyz;
import abc.A;
class B extends A {
void test(A a, B b) {
a.x = 100;
a.print();
b.x = 100;
b.print();
}
public void static main(String args[]){
B b = new B();
b.test();
}
}
这个程序哪错了啊