摘要：
java抽象类 java abstract class 有时候，我们需要用到抽象类。比如我们想买水果，但是不确定买的是苹果还是香蕉 Sometimes, we want to abstract a class.For example, We want buy some fruits,but we are not sure we buy apple or pear. 我们抽象出一个类叫水果 Now we can abstract a class named Fruit 水果就作为了一个抽象类和一个父亲类 Fruit is a abstract class and it is a father c 阅读全文
