接口 | 描述 |
---|---|
Elements |
用于操作程序元素的实用方法。
|
Types |
用于操作类型的实用方法。
|
除非在一个特定的实现另有规定,集合返回此包中的方法应该采用并行访问调用者和不安全是不可修改的。
除非另有规定,此包中的方法将如果null
扔NullPointerException
争论。
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