Android：基于布局的自定义视图：如何？(Android: Custom view based on layout: how?)

Game[] gamesArray = new Game[10];
 
 实例化意味着创建一个类的实例。 在上面的场景中，你刚刚声明了一个gamesArray类型的Game ，其大小为10 （仅仅是引用而没有其他）。 这就是为什么它不会抛出任何错误。 
 
 当你尝试时你会得到错误 
 
gamesArray[0] = new Game(); // because abstract class cannot be instantiated
 
 
 
 
 但创建一个抽象类的数组？ 
 
 
 稍后，你可以做这样的事情 
 
gamesArray[0] = new NonAbstractGame(); // where NonAbstractGame extends the Games abstract class.
 
 这是非常容许的，这就是为什么你会首先进入抽象类。 

Game[] gamesArray = new Game[10];
 
Instantiation means creation of an instance of a class. In the above scenario, you've just declared a gamesArray of type Game with the size 10(just the references and nothing else). That's why its not throwing any error.
 
You'll get the error when you try to do
 
gamesArray[0] = new Game(); // because abstract class cannot be instantiated
 
 
 
 
but make an array of the abstract class?
 
 
Later on, you can do something like this
 
gamesArray[0] = new NonAbstractGame(); // where NonAbstractGame extends the Games abstract class.
 
This is very much allowed and this is why you'll be going in for an abstract class on the first place.