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???????????? ???????[ 2013/8/20 11:23:40 ] ????????
????????1?е???????????????????ClassicSingleton??????????????????????????????????????????getInstance()?з?????????á?
????????ClassicSingleton???м????????????????????????ClassicSingleton??????????????????????????????????????????????;?????????????????????getInstance()??????????ε????????????????????????????????????????????????????????????Σ????ClassicSingleton????????protected????????????????????????????????ClassicSingleton??????????????????????????????????????
????public class SingletonInstantiator {
????public SingletonInstantiator() {
????????ClassicSingleton instance = ClassicSingleton.getInstance();
????????ClassicSingleton anotherInstance =
????????new ClassicSingleton();
????????...
????????}
????}
??????????????????????????м??ClassicSingleton????ClassicSingleton?????????rotected??????′??????????????protected??????????????????????????????е?????????á????ClassicSingleton??SingletonInstantiatorλ???????????????????????SingletonInstantiator?????????ClasicSingleton???????
????????????????????????????????????ClassicSingleton????????仯??е??private?????????ClassicSingleton????????????;????????ζ??ClassicSingleton?????????????????????????????????????????????????????????final???????????????????????????????????????Щ???????????????????????????????????????????У?????????????е???????????????????????????????
????????ClassicSingleton?????????????????????????????????????????????п???????????????????????????????????????ЩServlet?????????servlet????????????????????????????????????servlet?????????????????????и?????????
????????????ClasicSingleton?????java.io.Serializable????????????????????????л?????????????????????????л???????????????????????????????????????ж??????????????
???????????????????????1?е?ClassicSingleton????????????????????????????????????1?????2????????????ClassicSingleton.getInstance()????????????1?????if?飬??????2???п???????????ClassicSingleton???????????????????
???????????????????????????????????????????????????????Java?????????????????????????????????????????Java?淶??????????е?????????????????????¥??????????β??????????????
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