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摘要： 单例模式：why?创建对象的时间、内存消耗、GC及停顿时间恶汉式：(缺点是实例创建没法延迟加载)publicclassSingleton{privateSingleton(){}privatestaticSingletoninstance=newSingleton();publicstaticSingletongetInstance(){returninstance;}}懒汉式：(缺点：多线程下性能问题)publicclassLazySingleton{privateLazySingleton(){}privatestaticLazySingletoninstance=null;publics 阅读全文

摘要： WHY IS A BYTE 8 BITS? OR IS IT?Computer History Vignettes By Bob BemerI recently received an e-mail from one Zeno Luiz Iensen Nadal, a worker for Siemens in Brazil. He asked "My Algorythms teacher asked me and my colleagues 'Why a byte has eight bits?' Is there a technical answer for th 阅读全文