我使用自己的Comparator<TimeZone>
实现进行getRawOffset
比较:
@Override
public int compare(TimeZone tz1, TimeZone tz2) {
return tz2.getRawOffset() - tz1.getRawOffset();
}
它似乎通过了快速测试:
final List<TimeZone> timeZones = Arrays.asList(
TimeZone.getTimeZone("UTC"),
TimeZone.getTimeZone("America/Los_Angeles"),
TimeZone.getTimeZone("America/New_York"),
TimeZone.getTimeZone("Pacific/Honolulu"),
TimeZone.getTimeZone("Asia/Singapore")
);
final List<TimeZone> expectedOrder = Arrays.asList(
TimeZone.getTimeZone("Asia/Singapore"),
TimeZone.getTimeZone("UTC"),
TimeZone.getTimeZone("America/New_York"),
TimeZone.getTimeZone("America/Los_Angeles"),
TimeZone.getTimeZone("Pacific/Honolulu")
);
Collections.sort(timeZones, new Comparator<TimeZone>() {
@Override
public int compare(TimeZone tz1, TimeZone tz2) {
return tz2.getRawOffset() - tz1.getRawOffset();
}
});
//Impl note: see AbstractList.equals
System.out.println(timeZones.equals(expectedOrder)); //true
但我仍然想知道这个解决方案是否存在缺陷和/或是否有更好的方法。