それできみ、そのSOLIDとやらはなんの役に立つのかね ~オブジェクト指向の原則パッケージ編~

by Hisateru Tanaka

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ͦΕͰ͖Έɺ ͦͷ40-*%ͱ΍Β͸ ͳΜͷ໾ʹཱͭͷ͔Ͷ ʙΦϒδΣΫτࢦ޲ͷݪଇύοέʔδฤʙ

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ͨͳ͔ͻͯ͞Δ @tanakahisateru ॴ௕

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40*-%ྑ͍ΫϥεΛઃܭ͢ΔͨΊͷݪଇ

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ίʔυ͸্ख͘ॻ͍͍ͯΔ ͳͥσεϚΔͷ͔

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มߋʹڧ͍ΦϒδΣΫτ͸ ˓खஈ ☓໨త Ͱ͸ͳ͘ Ͱ͢Α ͑ʙͱɺ֬ೝͰ͚͚͢Ͳ

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ύοέʔδઃܭͷݪଇ ύοέʔδͷ಺෦ڽू౓ ύοέʔδಉ࢜ͷ݁߹౓ w ࠶ར༻ɾϦϦʔε౳Ձͷݪଇ w શ࠶ར༻ͷݪଇ w ด࠯ੑڞ௨ͷݪଇ w ඇ॥؀ґଘͷݪଇ w ҆ఆґଘͷݪଇ w ҆ఆ౓ɾந৅౓౳Ձͷݪଇ ྑॻʹ͸40-*%ͷ͋ͱඞͣॻ͔Ε͍ͯΔͷ͕

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ύοέʔδ ͱ͔ͷҙຯ΋͋Δ͚Ͳ

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package com.example.application.util ύοέʔδઃܭ ࣗ෼ͷϓϩμΫτʹϑΥϧμΛ੾Δ͜ͱ ͦͷϑΥϧμɺ͍·͙͢KBSʹ੾Γग़ͤ·͔͢ ύοέʔδਤ

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ύοέʔδͷ಺෦ڽू౓

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࠶ར༻ɾϦϦʔε౳Ձͷݪଇ ύοέʔδ࠶ར༻ͷඞཁ৚݅͸ ඼࣭؅ཧ͞Εͨύοέʔδͷ ϦϦʔε ख཭Ε Ͱ͋Δ

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શ࠶ར༻ͷݪଇ ύοέʔδ͸୯Ґ͝ͱʹશަ׵ͩ ద੾ʹ෼ׂ͠ͳ͍ͱϢʔβʔʹෆඞཁͳมߋΛڧ͍Δ

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ด࠯ੑڞ௨ͷݪଇ มߋՕॴ͕͋ͪͪ͜෼ࢄ͢Δͷ͸ͭΒ͍ ͻͱͭަ׵ͨ͠ΒࡁΉͷ͕ཧ૝

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ύοέʔδಉ࢜ͷ݁߹౓

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ඇ॥؀ґଘؔ܎ͷݪଇ ύοέʔδͷґଘؔ܎ʹ॥؀͕͋ͬͯ͸ͳΒͳ͍ ࿝ٺԽΛ଴͔ͭશͯյ͔͢ͷೋ୒ʹͳΔ

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҆ఆґଘͷݪଇ ґଘ͸ΑΓ҆ఆ͢Δ มߋͷগͳ͍ ํ޲ʹ޲͚Α

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҆ఆ౓ɾந৅౓౳Ձͷݪଇ ΑΓ҆ఆͨ͠ύοέʔδͱ͸ɺ ΑΓந৅తͳύοέʔδͰ͋Δ΂͖ ٯ΋·ͨવΓ

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࠶ར༻ɾϦϦʔε౳Ձͷݪଇ શ࠶ར༻ͷݪଇ ด࠯ੑڞ௨ͷݪଇ ඇ॥؀ґଘͷݪଇ ҆ఆґଘͷݪଇ ҆ఆ౓ɾந৅౓౳Ձͷݪଇ

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࠶ར༻ɾϦϦʔε౳Ձͷݪଇ શ࠶ར༻ͷݪଇ ด࠯ੑڞ௨ͷݪଇ ඇ॥؀ґଘͷݪଇ ҆ఆґଘͷݪଇ ҆ఆ౓ɾந৅౓౳Ձͷݪଇ ͪΌΜͱ෼͚Ζ ͪΌΜͱ·ͱΊΖ ҆ఆํ޲ʹͳ ͭ·Γ۩৅͔Βந৅ͷ͜ͱ΍ ୯ํ޲Ϛετͳ ύοέʔδ͸ʜ

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มߋʹڧ͍ΦϒδΣΫτ มߋʹڧ͍ϓϩμΫτߏ੒ ΦϒδΣΫτࢦ޲ͷݪଇ͸ ͰऴΘΓ͡Όͳͯ͘ ͦΕΛʮखஈʯͱͨ͠ 40-*%ʹ४ͯ͡Ϋϥεͷࢹ఺Ͱ ·Ͱҙࣝߦ͔ͳ͍ͱɺ001͕໾ʹཱͭͱ͸ݴ͑ͳ͍Μ͡Ό

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஫ΏΔ;ΘϓϩϚωຊ͡Όͳͯ͘Ψνͷίʔυઃܭख๏ຊͰ͢ ৄࡉ͸͍͍ͩͨ͜͜ʹ ॻ͍ͯ͋Δ 001ͳϓϩάϥϚʔඞಡͷݹయ ࣌୅ͷ͍ͤͰ λΠτϧ͕ӕ͘͘͞ ͳͬͨ࢒೦ͳࢠ

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೥ॳ൛ ӳޠ ͪͳΈʹॳ൛͕ಉ࣌ظͷຊͱ͍͑͹ͪ͜Β ឯ༨ۂં͋ͬͯ࠷ۙผͷຊʹͳΓ·ͨ͠Ͷ ೥લͱ͔ͦΜͳϨϕϧ͡Όͳ͍Ͱ͢Ͷ

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Ϟμϯ৽͚ΓΌ͍͍ ͔͍͍ͬ͜৽͍͠ΞʔΩςΫνϟΛ௥͍͔͚Δ·͑ʹɺ ͦͷ໨తײͱࠜݯΛ஌Ζ͏