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 instanceof Calendar
&& compareTo((Calendar)when) < 0;
}
public boolean after(Object when) {
return when instanceof Calendar
&& compareTo((Calendar)when) > 0;
}
//我认为这样比较合理
public boolean after(Canlendar when) {
return compareTo(when) > 0;
}
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So in comparison
Calendar直接用ComparaTo()就好啦Date和Calendarit is generally accepted as bad.Same question stackoverflow
Added:
Java8 implements the new package java.time, which is immutable and thread-safe. The main classes and formats in the package
correspond to the old API