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通常来说，我们认为hashCode不相同就为不同的对象。就这样由一段代码引发了一场讨论，代码如下： 有兴趣的话先猜一猜上面的打印结果。这段代码可以很好的说明String在创建对象的特殊性。运行上面的代码结果为： 猜对了吗？会不会有点奇怪，接下来我将逐一说明，并解释String创建对象的机理。首先我们 阅读全文
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概念： 解释器模式：Given a language, define a representation for its grammar along with an interpreter that uses the representation to interpret sentences in t 阅读全文
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概念： 状态模式：Allow an object to alter its benhavior when its internal state changes. The object will appear to change its class. 当一个对象内在状态改变是允许改变行为，这个对象看起 阅读全文
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概念： 访问者模式：Represent an operation to be performed on the elements of an object structure. Visitor lets you define a new operation without changing the 阅读全文
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概念： 备忘录模式：Without violating encapsulation, capture and externalize an object's internal state so that the object can be restored to this state later. 阅读全文
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概念： 观察者模式：Define a one-to-many dependency between objects so that when one object changes state, all its dependents are notifued and updated automatic 阅读全文
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概念： 中介者模式：Define an object that encapsulates how a set of objects interact. Mediator promotes loose coupling by keeping objects from referring to each 阅读全文
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概念： 迭代器模式：Provide a way to access the elements of an aggregarte object sequentiaally with exposing its underlying representation. 提供一种访问容器对象内每个元素的一种方式 阅读全文
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概念： 策略模式：Define a family of algorithms, encapsulate each one, and make them interchangeable. 定义一组算法，封装每个算法，并使他们之间可以互相转换。实现： 抽象的策略类 具体的策略实现类 总的调用类 测试及结 阅读全文
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概念： 责任链模式：Avoid coupling the sender of a request to its receiver by giving more than one object a chance to handle the request. Chain the receivering 阅读全文