This change to the utility class is the first since the Collections Framework debuted in J2SE 1.2.

自从集合框架初次出现在 J2SE 1.2 中以来，人们第一次对实用工具类进行了更改。

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One of the bigger changes to the 5.0 Collections Framework is the addition of the new base interface Queue.

集合框架较大的一个改变就是添加了新的基接口 Queue。

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This way, container classes that do not build on the core collections framework can still take advantage of the new for-each loop.

这样，不是在核心集合框架上构建的容器类也能利用新的for - each循环。

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