public class Parent
{
public void test()
{
}

public Parent()
{
test();
}

public static void main(String[] args)
{
new Child();
}
}

class Child extends Parent
{
private int instanceValue = 20;
public void test()
{
System.out.println("instance value is: " + instanceValue);
}
}
各位先猜猜打印的结果是多少呢？为什么呢？