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calendar类before object 的相关内容

Calendar类中boolean before(Object when)方法的作用是什么？

Calendar类中boolean before(Object when)方法的作用是什么？

为什么Calendar类的before,after方法的参数是Object类型的？

源码如下，当参数不是Calendar的实例时返回的是false，但请问这样的比较有意义吗？我个人觉得参数类型是不是不妥？比如我拿Date类型去做比较，不抱任何错，但其实永远返回的都是false。public boolean before(Object when) { return when inst...

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更新时间 2024-04-30 22:25:36

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对象存储 OSS

对象存储（Object Storage Service，简称 OSS）是海量、安全、低成本、高可靠的云存储服务，具有与平台无关 RESTful API，能从互联网任何位置访问。OSS 提供标准、低频、归档等类型选择，全面优化存储成本。

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产品入门

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新春特惠

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