Java 继承与组成之间的区别
组成和继承相同吗?如果要实现合成模式,如何在Java中实现呢?
回答:
组成意味着HAS A
继承IS A
Example
:汽车有发动机,汽车是汽车
在编程中,它表示为:
class Engine {} // The Engine class.class Automobile {} // Automobile class which is parent to Car class.
class Car extends Automobile { // Car is an Automobile, so Car class extends Automobile class.
private Engine engine; // Car has an Engine so, Car class has an instance of Engine class as its member.
}
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