Java标准库是否缺少某种集合类型？ 1、 Guava是一套由谷歌为自身Java项目开发的工具库，主要聚焦于集合操作、输入输出处理及数学运算，并与ApacheCommons库有一定功能重叠。该库可视为对Java Collections API中数据结构的有效补充和扩展，提升了开发效率与代码简洁性。

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I have found these various “singleton” methods to be useful for passing a single value to an API that requires a collection of that value. Of course, this works best when the code processing the ...

Certain principles hold for the use of iterators: In general, you should be able to have multiple traversals in progress at the same time; that is, an iterator should allow for the concept of nested ...