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Patterns in Java This article is contributed by Wang HaiLong. Preface The Java class library heavily employs Design Patterns. This article discusses such scenarios. Iterator Collection/Itera

Ubiquitous Iterator  This article is contributed by Wang HaiLong.  Preface  As one of 23 basic Design Patterns, Iterator seems to appear everywhere. This article discusses some scenarios w

About Name Directory Service This article is contributed by Wang HaiLong. Introduction It seems that all the C/S based systems have similar architectures and work according to similar rules: 1