爲什麼運行Poymorphism行爲類變量的變化

可能重複：
Hiding instance variables of a class 爲什麼運行Poymorphism行爲類變量的變化

我有以下類

AbstractTest

public abstract class AbstractTest { 
protected int testVar = 10; 
}

測試

public class Test extends AbstractTest { 
int testVar = 5; 

public static void main(String[] args) { 
    AbstractTest test = new Test(); 
    System.out.println(test.testVar);//Prints 10 

    Test secondTest = new Test(); 
    System.out.println(secondTest.testVar);//Prints 5 
} 
}

爲什麼上述程序打印10對於第一殼體和5對於第二種情況雖是同一類即Test()的對象？

更新：

I am now confused about how memory is allocated to Object and its variables. As instance variable is getting changed based on Class which is behaviour of Static?

更新：1

Every object will have two variables so question of same memory allocation does not comes in to picture. Thanks.

來源

2012-09-12 Amit Deshpande