????3??Google Guava????е?Sets

???????????
??????????????????????
????a.???????
????b.???????
????c.?????????????
????d.??????????????
?????????????????????????????Guava sets??????????????????????????????????????25%???????????????????????????????????????
????????????????δ????п?????????????????????????????????????????????????????????????????????????????????????person?????bestfriend????????null????????null????bestfriend????results????????????person???????????bestfriend??????????person??bestfriend????????????????????????????????bestfriend???????person????????????person???????bestfriend??????????bestfriend??????????result???????????????????????????????????Set??????????????????person????????????????????????????????
?????????????????????δ?????п??????????t???????out of memory exception???????????????????б?????????????????????set?????person???????????t???
???????????£??????????????Google Guava?????????????д?????????? the lesser known yet useful features about it
????4??????????????????г????

?????????????δ??????????????
????a.??д???
????b.??????null?
????c.?????????
????d.??????????????
??????????????????????????????????????????????????????????26%??????????????
?????????п?????????????????????????????????????????????Щ?????á????????????????????δ???????????????????????????????list??????????????????????list??????????£????????????????????[John]??????????????????????г??????????????????????????????????????????????????????List????????NAMES??????????????????null????????????????????δ?????????list?????
??????????????????????????????????????ο?????right here????
????5???????????Map?????????????

??????????????????????????????????????????е?Barak Yaish?????27%??????????????????
?????????????δ???????????
????a.???????
????b.?????????
????c.[] true
????d.[“bar”?? “ber”]
?????e????????????compute???????key??map?в??????value????????value??null???????(key?? value)????????value??????????????list?????“foo”??????????v??null???????????map?в??????“foo”????“foo”???new ArrayList<Object>()???????ArrayList????????????????????[]??
????????У?“foo”?????????map?????У?????????????????????ArrayList??????????List????????“ber”???????????List?С?add????????true?????true?????д?????????
????????????????”[]true”????θ?лBarak??????????????
??????????£??????????????

?????????????????????????Java???????????
????a.A
????b.??????
????c.C
????d.B??C???????
????????????????????Peter Lawrey????????????????OpenHFT?????????????Vanilla Java???д?????Peter??StackOverflow??????top 50????????????????????????76%???????????????????
????C????A????B??D??????????
????????
??????????????????????С???????????????Java???????????????????????????????????????????????С??????????????????????????????????????????????????????á?????????????????????綽??????????????????????????????????????????????Takipi???Java?????Takipi?????Java????????????????????????δ???????????????????????????????????????????????????????????п??????????????????????????????????????