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2012-04-05 JavaOne Tokyo Special LT
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都元ダイスケ - MIYAMOTO Daisuke
April 07, 2012
Technology
260
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2012-04-05 JavaOne Tokyo Special LT
都元ダイスケ - MIYAMOTO Daisuke
April 07, 2012
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Transcript
The other day...
1िؒલʹϦϦʔεʂ ※ Powered by Java
This morning... डʹͯ
໌LTͰΔ༧ఆͷݩͰ͢ …͝ొ͕͍͟͝·ͤΜ ͋ɺٶຊʹͳͬͯΔ͔͠Ε·ͤΜ …͍͟͝·ͤΜ…
͋ɺ͋Γ·ͨ͠ʂ ຊͰ͢ΑͶʂ
͋ɺ͋Γ·ͨ͠ʂ ຊͰ͢ΑͶʂ
ࣗݾհ • ݩμΠεέ (@daisuke_m) • Apache Mahout ػցֶश • DDD
ษڧϥΠϑϩά • ͍ͭɾԿΛɾԿ࣌ؒษڧͨ͠ʁ • ͍ͭษڧ͢Δ༧ఆʁ ࣌ؒʁ • ࠓɾࡢɾࠓ݄ɾઌ݄ͷษڧ࣌ؒʁ
ͦΕ࡞ͬͯΔ࣌ʹ ݸਓతʹۤ࿑ͨ͠
ཁ͢Δʹɺओʹ ࣌ؒͱྐྵ͕ۀࣝ
2:33 • ͦΕ࣌ࠁʁ ޕલ2࣌33 • ͦΕ࣌ؒྔʁ 2࣌ؒ33 • Java੩తܕΛେࣄʹ͍ͨ͠Ͱ͢Ͷ •
ʮ࣌ؒʯ༻ېࢭ
ྐྵ • 1=12ϲ݄ʢແۤͳෆۉׂΓʣ • 4ʹҰɺ͏Δ͏ɻ • ୠ͠ɺ100ʹҰͷྫ֎ • ୠ͠ɺ400ʹҰͷྫ֎ͷྫ֎ •
͜ͷล·Ͱඪ४API͕αϙʔτ
ि • ͱ͔݄ͱ͔Ұແࢹͨ͠ 7पظͷΞϨ • Ͳ͔͜Β͕ୈ1िʁ 1ΛؚΉिʁ • िͷ࢝·Γ݄༵ʁ ༵ʁ
λΠϜκʔϯ • UTC-11 αϞΞ • UTC+14 ΩϦεΟϚεΟౡ • "ࠓ"
"ࠓ݄" Λਖ਼֬ʹଊ͑ΔͨΊ ʹɺλΠϜκʔϯͷಛఆ͕ඞཁ
͜͏ͯ͠ݟͯΈΔͱ ࣮ͷੌ͘ෳࡶ ͜͜ʹڍ͛ͨϧʔϧ͘͝Ұ෦ ϧʔϧͬͯΔΜ͚ͩͲͶ
ͦΜͳᓔಃ͠͞Λ શͯղܾ͢Δۜͷؙ
ΤϙοΫඵ • ࠓ໌ि݄Ӟ࣌ࠩͳ͍ • ͨͩ͠ɺৗਓ͕ݟͯΑ͘Θ͔ΒΜ t 0L 1333333333L 2012-04-02 11:22:13
JST 1970-01-01 09:00:00 JST
Javaඪ४API • ͝ଘͷ௨Γ৭ʑΞϨ
JodaTime? JSR 310? • ແବʹෳࡶա͗Δ… • Ethiopic(ΤνΦϐΞྐྵ)? • Coptic(ίϓτྐྵ)? •
͔ͭΘͶʔΑ͆
͏͍͍ɻ ΦϨΦϨͰߦ͘
baseunits v2.1 • ΦϨΦϨOSS • ࣌ࠁ TimePoint ͰෆมΫϥε • ࣌ؒྔ
Duration ͰෆมΫϥε • ݱࡏ࣌ࠁ Clock ͕ͬͯΔ ... • ࡞ͬͯΑ͔ͬͨɺ࣮ࡍɻ Apache License 2.0
ςετ݁ߏ ͨͬΓॻ͍ͨ͠ ࣮αʔϏε্Ͱ ಈ͍ͯΔ࣮ΞϦ ͋ͱggr
࣍ɻ
ͦͷαʔϏεΛ ϦϦʔε్ͨ͠ ϑϧϘοίʹ ͞Εͨ
None
None
None
͓ӄ͞·Ͱ͍ͩͿ ڧ͘ͳΓ·ͨ͠
ѱҙʢ͋·Γʣ ͳ͍Α͏Ͱ͢
We are HIRING! • Java • Wicket • Spring •
Mirage • Ehcache • DDD • Elastic Beanstalk • iOS • ...... • ...etc ͜ͷลͷΩʔϫʔυʹ͍͔ͭ͘Ҿ͔͔ͬͬͨΒ @daisuke_m·Ͱ͝࿈བྷ͍ͩ͘͞ωɻ