摘要：
Abstract Factory patterns work around a super-factory which creates other factories. This factory is also called as factory of factories. This type of 阅读全文
摘要：
Factory pattern is one of the most used design patterns in Java. This type of design pattern comes under creational pattern. Below is the diagram on t 阅读全文
摘要：
This pattern involves a single class which is responsible to create an object while making sure that only single object gets created. This class provi 阅读全文