Java Timestamp Memo

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timestamp的构造函数，把微妙作为纳秒存储，
所以 Java.util.date.comepareTo(Timestamp) 结果肯定是1
另外，?Timestamp.equal(object) 如果参数不是Timestamp，肯定返回false。
Timestamp‘s nanos value is NOT the number of nanoseconds - it‘s ananosecond-resolution number of millis (i.e. fractional seconds).As such, in the Timestamp constructor, it is setting the time onthe super to be without milliseconds. Therefore, the Timestamp willalways have a lower value for the member fastTime (used in Date‘scompareTo()) than the corresponding Date (unless, of course, it hasno fractional seconds).
 

Java Timestamp Memo

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原文地址：http://www.cnblogs.com/sdfczyx/p/6396702.html