{"id":2265,"date":"2024-10-07T10:00:00","date_gmt":"2024-10-07T01:00:00","guid":{"rendered":"https:\/\/freelance-career.jp\/article\/?p=2265"},"modified":"2025-07-08T14:47:21","modified_gmt":"2025-07-08T05:47:21","slug":"%e3%80%90%e5%be%b9%e5%ba%95%e6%af%94%e8%bc%83%e3%80%91kotlin%e3%81%a8java%e3%81%ae%e9%81%95%e3%81%84%e3%81%af%ef%bc%9f%e3%81%9d%e3%82%8c%e3%81%9e%e3%82%8c%e3%81%ae%e7%89%b9%e5%be%b4%e3%82%84%e3%83%a1","status":"publish","type":"post","link":"https:\/\/freelance-career.jp\/article\/2265\/","title":{"rendered":"\u3010\u5fb9\u5e95\u6bd4\u8f03\u3011Kotlin\u3068Java\u306e\u9055\u3044\u306f\uff1f\u305d\u308c\u305e\u308c\u306e\u7279\u5fb4\u3084\u30e1\u30ea\u30c3\u30c8\u30fb\u30c7\u30e1\u30ea\u30c3\u30c8\u3092\u89e3\u8aac"},"content":{"rendered":"\n<p>Java\u306e\u9577\u6240\u3092\u7d99\u627f\u3057\u3064\u3064\u3001null\u5b89\u5168\u6027\u3084\u7c21\u6f54\u306a\u6587\u6cd5\u306a\u3069\u306e\u6539\u5584\u3092\u65bd\u3057\u305f\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9eKotlin\uff08\u30b3\u30c8\u30ea\u30f3\uff09\u3002Android\u958b\u767a\u306b\u304a\u3044\u3066\u3001Google\u304cKotlin\u3092\u516c\u5f0f\u8a00\u8a9e\u3068\u3057\u3066\u63a1\u7528\u3057\u305f\u3053\u3068\u3067\u3001\u305d\u306e\u4eba\u6c17\u306b\u62cd\u8eca\u304c\u304b\u304b\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4e00\u65b9\u3067Android\u958b\u767a\u8a00\u8a9e\u3068\u3057\u3066\u6709\u540d\u306aJava\u3082\u4f9d\u7136\u3068\u3057\u3066\u9700\u8981\u304c\u9ad8\u304f\u3001<\/p>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"blue\"><div class=\"c-balloon__icon -circle\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/freelance-career.jp\/article\/wp-content\/uploads\/2023\/10\/fukidashi01\u30de\u30ce\u30a2\u30fb\u30ea\u30ce\u69d8.png\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><\/div><div class=\"c-balloon__body -thinking -border-on\"><div class=\"c-balloon__text\">\n<p>\u3069\u3061\u3089\u306e\u8a00\u8a9e\u3092\u7fd2\u5f97\u3057\u3088\u3046<\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<p>\u3068\u8003\u3048\u3066\u3044\u308b\u65b9\u3082\u591a\u3044\u306f\u305a\u3002<\/p>\n\n\n\n<p>\u305d\u3053\u3067\u672c\u8a18\u4e8b\u3067\u306f<strong><span class=\"swl-marker mark_orange\">Kotlin\u3068Java\u305d\u308c\u305e\u308c\u306e\u9055\u3044\u3084\u7279\u5fb4\u3001\u30e1\u30ea\u30c3\u30c8\u30fb\u30c7\u30e1\u30ea\u30c3\u30c8\u306a\u3069\u3092\u6bd4\u8f03\u3057\u3066\u89e3\u8aac<\/span><\/strong>\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Java\u3068\u306f<\/h2>\n\n\n\n<p>Java\u3068\u306fC\u8a00\u8a9e\u3092\u30d9\u30fc\u30b9\u306b\u751f\u307e\u308c\u305f\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3002\u6570\u3042\u308b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306e\u4e2d\u3067\u3082\u5727\u5012\u7684\u306a\u30b7\u30a7\u30a2\u3092\u8a87\u308a\u3001Google\u304c\u958b\u767a\u3067\u4f7f\u7528\u3059\u308b\u4e09\u5927\u8a00\u8a9e\uff08Java\u3001C\uff0b\uff0b\u3001Python\uff09\u306e\u4e00\u3064\u3068\u3057\u3066\u3082\u6709\u540d\u3067\u3059\u3002\u79c1\u305f\u3061\u306e\u751f\u6d3b\u3092\u652f\u3048\u308b\u30c7\u30b9\u30af\u30c8\u30c3\u30d7\u306e\u30a2\u30d7\u30ea\u3084Web\u30b5\u30fc\u30d3\u30b9\u3001Android\u30a2\u30d7\u30ea\u3001\u91d1\u878d\u6a5f\u95a2\u306e\u6a5f\u95a2\u30b7\u30b9\u30c6\u30e0\u3001\u5bb6\u96fb\u3084\u30ab\u30fc\u30ca\u30d3\u306e\u7d44\u307f\u8fbc\u307f\u30b7\u30b9\u30c6\u30e0\u3001IoT\u6a5f\u5668\u306a\u3069\u3001\u3042\u3089\u3086\u308b\u30b7\u30b9\u30c6\u30e0\u304cJava\u3067\u958b\u767a\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"swell-block-capbox cap_box is-style-intext\"><div class=\"cap_box_ttl\"><span><strong><span class=\"swl-fz u-fz-l\">Java\u306e\u7279\u5fb4<\/span><\/strong><\/span><\/div><div class=\"cap_box_content\">\n<p>Java\u306f\u30b7\u30f3\u30d7\u30eb\u3055\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u3001\u30dd\u30fc\u30bf\u30d3\u30ea\u30c6\u30a3\u3092\u91cd\u8996\u3057\u305f\u6c4e\u7528\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3067\u3059\u3002Java\u306e\u6700\u5927\u306e\u7279\u5fb4\u306f\u3001Write Once, Run Anywhere\uff08\u300c\u4e00\u5ea6\u3014\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u3015\u66f8\u3051\u3070\u3001\u3069\u3053\u3067\u3082\u5b9f\u884c\u3067\u304d\u308b\u300d\uff09\u3092\u5b9f\u73fe\u3059\u308b\u4e2d\u9593\u8a00\u8a9e\u30d0\u30a4\u30c8\u30b3\u30fc\u30c9\u3068JVM\u306b\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u69d8\u3005\u306a\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3067\u52d5\u4f5c\u53ef\u80fd\u306a\u9ad8\u3044\u53ef\u642c\u6027\u3092\u6301\u3061\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u307e\u305f\u3001\u8c4a\u5bcc\u306a\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u3001\u30b5\u30fc\u30c9\u30d1\u30fc\u30c6\u30a3\u30e9\u30a4\u30d6\u30e9\u30ea\u3001\u958b\u767a\u30c4\u30fc\u30eb\u304c\u63d0\u4f9b\u3055\u308c\u3001\u5927\u898f\u6a21\u30b7\u30b9\u30c6\u30e0\u306e\u958b\u767a\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002Java\u306f\u3001\u5805\u7262\u3067\u5927\u898f\u6a21\u306a\u30b7\u30b9\u30c6\u30e0\u958b\u767a\u306b\u7528\u3044\u3089\u308c\u308b\u8a00\u8a9e\u3068\u3057\u3066\u3001\u9577\u5e74\u306b\u308f\u305f\u3063\u3066\u4f01\u696d\u30b7\u30b9\u30c6\u30e0\u3084Android\u30a2\u30d7\u30ea\u958b\u767a\u3067\u6d3b\u7528\u3055\u308c\u3001\u9032\u5316\u3092\u7d9a\u3051\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"swell-block-capbox cap_box is-style-intext\"><div class=\"cap_box_ttl\"><span><strong>J<span class=\"swl-fz u-fz-l\">ava\u306e\u30e1\u30ea\u30c3\u30c8\u30fb\u30c7\u30e1\u30ea\u30c3\u30c8<\/span><\/strong><\/span><\/div><div class=\"cap_box_content\">\n<p>\u4e00\u65b9\u3001\u30c7\u30e1\u30ea\u30c3\u30c8\u3068\u3057\u3066\u306f\u3001\u5b9f\u884c\u901f\u5ea6\u304c\u30cd\u30a4\u30c6\u30a3\u30d6\u8a00\u8a9e\u306b\u6bd4\u3079\u3066\u3084\u3084\u9045\u3044\u3053\u3068\u3001\u8d77\u52d5\u6642\u9593\u304c\u9577\u3044\u3053\u3068\u3001\u5197\u9577\u306a\u6587\u6cd5\u306b\u3088\u308b\u30b3\u30fc\u30c9\u91cf\u306e\u5897\u52a0\u306a\u3069\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u307e\u305f\u3001Java\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u30a2\u30c3\u30d7\u306b\u4f34\u3046\u4e92\u63db\u6027\u306e\u554f\u984c\u3084\u3001\u30e9\u30a4\u30bb\u30f3\u30b9\u4f53\u7cfb\u306e\u5909\u66f4\u306b\u3088\u308b\u30b3\u30b9\u30c8\u306e\u5897\u52a0\u306a\u3069\u3082\u3001\u4e00\u90e8\u306e\u30e6\u30fc\u30b6\u30fc\u306b\u3068\u3063\u3066\u306f\u61f8\u5ff5\u4e8b\u9805\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u7dcf\u5408\u7684\u306b\u898b\u308c\u3070\u3001Java\u306f\u9577\u5e74\u306b\u308f\u305f\u3063\u3066\u4f01\u696d\u30b7\u30b9\u30c6\u30e0\u958b\u767a\u3067\u5b9f\u7e3e\u306e\u3042\u308b\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u8a00\u8a9e\u3067\u3042\u308b\u3068\u8a00\u3048\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n<\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Kotlin\u3068\u306f<\/h2>\n\n\n\n<p>Kotlin\u3068\u306fJetBrain\u793e\u304c2011\u5e74\u306b\u958b\u767a\u3057\u305fJava\u4eee\u60f3\u30de\u30b7\u30f3\u3067\u52d5\u304f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u30022017\u5e74\u306bGoogle\u304cAndroid\u958b\u767a\u306e\u63a8\u5968\u8a00\u8a9e\u306b\u63a1\u7528\u3057\u305f\u3053\u3068\u304b\u3089\u6ce8\u76ee\u3092\u96c6\u3081\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u305d\u308c\u307e\u3067Java\u3067\u958b\u767a\u3055\u308c\u3066\u3044\u305fAndroid\u30a2\u30d7\u30ea\u958b\u767a\u306f\u3001Kotlin\u304c\u767b\u5834\u3057\u305f\u3053\u3068\u3067\u3088\u308a\u7c21\u5358\u306b\u306a\u308a\u3001\u30a2\u30d7\u30ea\u958b\u767a\u306bKotlin\u3092\u63a1\u7528\u3055\u308c\u308b\u30b1\u30fc\u30b9\u304c\u5897\u3048\u3066\u3044\u307e\u3059\u3002\u305d\u308c\u306b\u4f34\u3044\u3001Kotlin\u3092\u6271\u3046\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u6570\u3082\u6025\u901f\u306b\u62e1\u5927\u3057\u3066\u3044\u308b\u72b6\u614b\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"swell-block-capbox cap_box is-style-intext\"><div class=\"cap_box_ttl\"><span><strong><span class=\"swl-fz u-fz-l\">Kotlin\u306e\u7279\u5fb4<\/span><\/strong><\/span><\/div><div class=\"cap_box_content\">\n<p>Kotlin\u306e\u4e3b\u306a\u7279\u5fb4\u3068\u3057\u3066\u3001null\u5b89\u5168\u6027\u3001\u578b\u63a8\u8ad6\u3001\u62e1\u5f35\u95a2\u6570\u3001\u30c7\u30fc\u30bf\u30af\u30e9\u30b9\u3001\u30b9\u30de\u30fc\u30c8\u30ad\u30e3\u30b9\u30c8\u306a\u3069\u304c\u6319\u3052\u3089\u308c\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u6a5f\u80fd\u306b\u3088\u308a\u3001\u30dc\u30a4\u30e9\u30fc\u30d7\u30ec\u30fc\u30c8\u30b3\u30fc\u30c9\u3092\u6e1b\u3089\u3057\u3001\u3088\u308a\u8aad\u307f\u3084\u3059\u304f\u3001\u30d0\u30b0\u306e\u5c11\u306a\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u307e\u305f\u3001Kotlin\u306f\u95a2\u6570\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3068 \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u30b3\u30f3\u30bb\u30d7\u30c8\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u304a\u308a\u3001\u67d4\u8edf\u3067\u8868\u73fe\u529b\u8c4a\u304b\u306a\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u304c\u53ef\u80fd\u3067\u3059\u3002Kotlin\u306f\u3001Android\u958b\u767a\u3092\u4e2d\u5fc3\u306b\u6025\u901f\u306b\u666e\u53ca\u304c\u9032\u3093\u3067\u304a\u308a\u3001\u30b5\u30fc\u30d0\u30fc\u30b5\u30a4\u30c9\u958b\u767a\u3067\u3082\u63a1\u7528\u304c\u5897\u3048\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"swell-block-capbox cap_box is-style-intext\"><div class=\"cap_box_ttl\"><span><strong><span class=\"swl-fz u-fz-l\">Kotlin\u306e\u30e1\u30ea\u30c3\u30c8\u30fb\u30c7\u30e1\u30ea\u30c3\u30c8<\/span><\/strong><\/span><\/div><div class=\"cap_box_content\">\n<p>Kotlin\u306e\u30e1\u30ea\u30c3\u30c8\u306f\u3001Java\u306b\u6bd4\u3079\u3066\u3088\u308a\u7c21\u6f54\u3067\u5b89\u5168\u306a\u30b3\u30fc\u30c9\u304c\u66f8\u3051\u308b\u3053\u3068\u3001null\u5b89\u5168\u6027\u306b\u3088\u308aNullPointerException\u3092\u9632\u3052\u308b\u3053\u3068\u3001\u578b\u63a8\u8ad6\u306b\u3088\u308a\u578b\u5ba3\u8a00\u3092\u7701\u7565\u3067\u304d\u308b\u3053\u3068\u3001\u62e1\u5f35\u95a2\u6570\u306b\u3088\u308a\u65e2\u5b58\u30af\u30e9\u30b9\u306e\u6a5f\u80fd\u3092\u62e1\u5f35\u3067\u304d\u308b\u3053\u3068\u306a\u3069\u3067\u3059\u3002\u307e\u305f\u3001Java\u3068\u306e\u9ad8\u3044\u4e92\u63db\u6027\u306b\u3088\u308a\u3001\u65e2\u5b58\u306eJava\u30b3\u30fc\u30c9\u3068\u5171\u5b58\u3067\u304d\u308b\u306e\u3082\u5927\u304d\u306a\u5229\u70b9\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u4e00\u65b9\u3001\u30c7\u30e1\u30ea\u30c3\u30c8\u3068\u3057\u3066\u306f\u3001Java\u306b\u6bd4\u3079\u3066\u8a00\u8a9e\u81ea\u4f53\u304c\u65b0\u3057\u3044\u305f\u3081\u3001\u5b66\u7fd2\u30b3\u30b9\u30c8\u304c\u304b\u304b\u308b\u3053\u3068\u3001\u4e00\u90e8\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u304cKotlin\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u306a\u3044\u3053\u3068\u3001\u30d3\u30eb\u30c9\u6642\u9593\u304cJava\u306b\u6bd4\u3079\u3066\u9577\u304f\u306a\u308b\u50be\u5411\u306b\u3042\u308b\u3053\u3068\u306a\u3069\u304c\u6319\u3052\u3089\u308c\u307e\u3059\u3002\u305f\u3060\u3057\u3001Kotlin\u306e\u30a8\u30b3\u30b7\u30b9\u30c6\u30e0\u306f\u6025\u901f\u306b\u6210\u9577\u3057\u3066\u304a\u308a\u3001\u3053\u308c\u3089\u306e\u30c7\u30e1\u30ea\u30c3\u30c8\u306f\u5f90\u3005\u306b\u89e3\u6d88\u3055\u308c\u3064\u3064\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Java\u3068Kotlin\u306e\u9055\u3044\u306b\u3064\u3044\u3066<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"768\" height=\"403\" src=\"https:\/\/freelance-career.jp\/article\/wp-content\/uploads\/2024\/07\/compare-768x403.jpg\" alt=\"\" class=\"wp-image-2383\" srcset=\"https:\/\/freelance-career.jp\/article\/wp-content\/uploads\/2024\/07\/compare-768x403.jpg 768w, https:\/\/freelance-career.jp\/article\/wp-content\/uploads\/2024\/07\/compare-300x158.jpg 300w, https:\/\/freelance-career.jp\/article\/wp-content\/uploads\/2024\/07\/compare.jpg 1200w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><\/figure>\n\n\n\n<p>Java\u3068Kotlin\u306f\u3001\u3069\u3061\u3089\u3082JVM\u3067\u52d5\u4f5c\u3059\u308b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3067\u3059\u304c\u3001\u3044\u304f\u3064\u304b\u306e\u91cd\u8981\u306a\u9055\u3044\u304c\u3042\u308a\u307e\u3059\u3002\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<div class=\"swell-block-capbox cap_box is-style-intext\"><div class=\"cap_box_ttl\"><span><strong><span class=\"swl-fz u-fz-l\">\u8a00\u8a9e\u8a2d\u8a08<\/span><\/strong><\/span><\/div><div class=\"cap_box_content\">\n<p>Kotlin\u306fJava\u306e\u5197\u9577\u6027\u3092\u524a\u6e1b\u3057\u3001\u3088\u308a\u7c21\u6f54\u3067\u8868\u73fe\u529b\u8c4a\u304b\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u3092\u76ee\u7684\u306b\u8a2d\u8a08\u3055\u308c\u307e\u3057\u305f\u3002Kotlin\u3067\u306f\u30bb\u30df\u30b3\u30ed\u30f3\u306e\u7701\u7565\u3001\u578b\u63a8\u8ad6\u3001\u30d7\u30ed\u30d1\u30c6\u30a3\u69cb\u6587\u306a\u3069\u306b\u3088\u308a\u3001\u30b3\u30fc\u30c9\u91cf\u3092\u6e1b\u3089\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"swell-block-capbox cap_box is-style-intext\"><div class=\"cap_box_ttl\"><span><strong><span class=\"swl-fz u-fz-l\">Null\u5b89\u5168\u6027<\/span><\/strong><\/span><\/div><div class=\"cap_box_content\">\n<p>Kotlin\u306fNull\u5b89\u5168\u6027\u3092\u8a00\u8a9e\u30ec\u30d9\u30eb\u3067\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u304a\u308a\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306bNullPointerException\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002Java\u3067\u306f\u3001null\u30c1\u30a7\u30c3\u30af\u3092\u958b\u767a\u8005\u304c\u624b\u52d5\u3067\u884c\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"swell-block-capbox cap_box is-style-intext\"><div class=\"cap_box_ttl\"><span><strong><span class=\"swl-fz u-fz-l\">\u95a2\u6570<\/span><\/strong><\/span><\/div><div class=\"cap_box_content\">\n<p>Kotlin\u3067\u306f\u95a2\u6570\u306f\u7b2c\u4e00\u7d1a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u3042\u308a\u3001\u5909\u6570\u306b\u4ee3\u5165\u3057\u305f\u308a\u3001\u5f15\u6570\u3068\u3057\u3066\u6e21\u3057\u305f\u308a\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001\u62e1\u5f35\u95a2\u6570\u306b\u3088\u308a\u3001\u65e2\u5b58\u306e\u30af\u30e9\u30b9\u306b\u65b0\u3057\u3044\u6a5f\u80fd\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002Java\u3067\u306f\u3001\u95a2\u6570\u306f\u5e38\u306b\u30af\u30e9\u30b9\u306b\u5c5e\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"swell-block-capbox cap_box is-style-intext\"><div class=\"cap_box_ttl\"><span><strong><span class=\"swl-fz u-fz-l\">\u30c7\u30fc\u30bf\u30af\u30e9\u30b9<\/span><\/strong><\/span><\/div><div class=\"cap_box_content\">\n<p>Kotlin\u3067\u306f\u30c7\u30fc\u30bf\u3092\u4fdd\u6301\u3059\u308b\u3060\u3051\u306e\u30af\u30e9\u30b9\u3092\u7c21\u5358\u306b\u5b9a\u7fa9\u3067\u304d\u308b\u30c7\u30fc\u30bf\u30af\u30e9\u30b9\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002Java\u3067\u306f\u540c\u7b49\u306e\u6a5f\u80fd\u3092\u5b9f\u88c5\u3059\u308b\u306b\u306f\u3001\u30dc\u30a4\u30e9\u30fc\u30d7\u30ec\u30fc\u30c8\u30b3\u30fc\u30c9\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"swell-block-capbox cap_box is-style-intext\"><div class=\"cap_box_ttl\"><span><strong><span class=\"swl-fz u-fz-l\">\u30b9\u30de\u30fc\u30c8\u30ad\u30e3\u30b9\u30c8<\/span><\/strong><\/span><\/div><div class=\"cap_box_content\">\n<p>Kotlin\u3067\u306f\u3001\u578b\u30c1\u30a7\u30c3\u30af\u3068\u5909\u6570\u30ad\u30e3\u30b9\u30c8\u3092\u81ea\u52d5\u7684\u306b\u884c\u3063\u3066\u304f\u308c\u308b\u30b9\u30de\u30fc\u30c8\u30ad\u30e3\u30b9\u30c8\u304c\u5229\u7528\u3067\u304d\u307e\u3059\u3002Java\u3067\u306f\u660e\u793a\u7684\u306a\u30ad\u30e3\u30b9\u30c8\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"swell-block-capbox cap_box is-style-intext\"><div class=\"cap_box_ttl\"><span><strong><span class=\"swl-fz u-fz-l\">\u578b\u30b7\u30b9\u30c6\u30e0<\/span><\/strong><\/span><\/div><div class=\"cap_box_content\">\n<p>Kotlin\u3067\u306f\u3059\u3079\u3066\u304c\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u3042\u308a\u3001\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u307e\u305f\u3001Kotlin\u306e\u578b\u30b7\u30b9\u30c6\u30e0\u306f\u3001Java\u3088\u308a\u3082\u67d4\u8edf\u3067\u8868\u73fe\u529b\u8c4a\u304b\u3067\u3059\u3002<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"swell-block-capbox cap_box is-style-intext\"><div class=\"cap_box_ttl\"><span><strong><span class=\"swl-fz u-fz-l\">\u76f8\u4e92\u904b\u7528\u6027<\/span><\/strong><\/span><\/div><div class=\"cap_box_content\">\n<p>Kotlin\u306fJava\u3068\u306e\u9ad8\u3044\u76f8\u4e92\u904b\u7528\u6027\u3092\u6301\u3061\u3001\u65e2\u5b58\u306eJava\u30b3\u30fc\u30c9\u3092\u547c\u3073\u51fa\u3057\u305f\u308a\u3001Java\u304b\u3089 Kotlin \u30b3\u30fc\u30c9\u3092\u547c\u3073\u51fa\u3057\u305f\u308a\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u4e00\u90e8\u306eKotlin\u56fa\u6709\u306e\u6a5f\u80fd\u306f\u3001Java\u304b\u3089\u76f4\u63a5\u5229\u7528\u3067\u304d\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u9055\u3044\u304b\u3089Kotlin\u306fJava\u306b\u6bd4\u3079\u3066\u3088\u308a\u5b89\u5168\u3067\u7c21\u6f54\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u3001\u958b\u767a\u8005\u306e\u751f\u7523\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3001Java\u306e\u8c4a\u5bcc\u306a\u30a8\u30b3\u30b7\u30b9\u30c6\u30e0\u3084\u3001\u65e2\u5b58\u306eJava\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3068\u306e\u4e92\u63db\u6027\u3082\u8003\u616e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">\u3053\u308c\u304b\u3089\u5b66\u3076\u306a\u3089Kotlin\u304c\u304a\u3059\u3059\u3081\uff1f<\/h2>\n\n\n\n<p>\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3092\u9078\u629e\u3059\u308b\u969b\u306f\u3001\u500b\u4eba\u306e\u76ee\u7684\u3084\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u5224\u65ad\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u304c\u3001\u3053\u308c\u304b\u3089\u5b66\u3076\u8a00\u8a9e\u3068\u3057\u3066\u306fKotlin\u304c\u304a\u3059\u3059\u3081\u3067\u3059\u3002<\/p>\n\n\n\n<p>Kotlin\u306fJava\u306e\u9577\u6240\u3092\u7d99\u627f\u3057\u3064\u3064\u3001\u3088\u308a\u73fe\u4ee3\u7684\u3067\u5b89\u5168\u306a\u8a00\u8a9e\u8a2d\u8a08\u3092\u63a1\u7528\u3057\u3066\u3044\u307e\u3059\u3002Kotlin\u3092\u5b66\u3076\u3053\u3068\u3067\u3001null\u5b89\u5168\u6027\u3001\u578b\u63a8\u8ad6\u3001\u95a2\u6570\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306a\u3069\u3001\u73fe\u4ee3\u7684\u306a\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u6982\u5ff5\u3092\u8eab\u306b\u3064\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001<strong>Kotlin\u306fAndroid\u958b\u767a\u306b\u304a\u3044\u3066\u516c\u5f0f\u8a00\u8a9e\u3068\u3057\u3066\u63a1\u7528\u3055\u308c\u3066\u3044\u3066\u3001\u30e2\u30d0\u30a4\u30eb\u30a2\u30d7\u30ea\u958b\u767a\u306e\u9818\u57df\u3067\u5927\u304d\u306a\u9700\u8981<\/strong>\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3055\u3089\u306b\u3001Kotlin\u306fJava\u3068\u306e\u9ad8\u3044\u4e92\u63db\u6027\u3092\u6301\u3064\u305f\u3081\u3001\u65e2\u5b58\u306eJava\u306e\u30a8\u30b3\u30b7\u30b9\u30c6\u30e0\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002Kotlin\u3092\u5b66\u3093\u3060\u5f8c\u306bJava\u3092\u5b66\u3076\u5fc5\u8981\u304c\u751f\u3058\u305f\u5834\u5408\u3067\u3082\u3001\u6bd4\u8f03\u7684\u30b9\u30e0\u30fc\u30ba\u306b\u79fb\u884c\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u4e00\u65b9\u3001Java\u306f\u9577\u5e74\u306b\u308f\u305f\u3063\u3066\u4f7f\u308f\u308c\u3066\u304d\u305f\u5b9f\u7e3e\u304c\u3042\u308a\u3001\u4f01\u696d\u30b7\u30b9\u30c6\u30e0\u306e\u958b\u767a\u3067\u5e83\u304f\u63a1\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002Java\u3092\u5b66\u3076\u3053\u3068\u3067\u3001\u5e45\u5e83\u3044\u5c31\u8077\u5148\u3084\u6848\u4ef6\u306b\u5bfe\u5fdc\u3067\u304d\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002Kotlin\u3092\u5148\u306b\u5b66\u3093\u3067\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066Java\u3092\u5b66\u3076\u306e\u304c\u52b9\u7387\u7684\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u3068\u8a00\u3048\u308b\u3067\u3057\u3087\u3046\u3002\u305f\u3060\u3057\u3001\u6700\u7d42\u7684\u306b\u306f\u500b\u4eba\u306e\u76ee\u7684\u3084\u30ad\u30e3\u30ea\u30a2\u30d7\u30e9\u30f3\u306b\u5408\u308f\u305b\u3066\u3001\u5b66\u3076\u8a00\u8a9e\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u5927\u5207\u3067\u3059\u3002Kotlin\u3068Java\u3001\u3069\u3061\u3089\u3092\u5b66\u7fd2\u3057\u3088\u3046\u304b\u8ff7\u3063\u3066\u3044\u308b\u65b9\u306f\u305c\u3072\u672c\u8a18\u4e8b\u3092\u53c2\u8003\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<p>\u307e\u305f\u3001\u6848\u4ef6\u7372\u5f97\u306b\u306f<span class=\"swl-fz u-fz-l\"><a rel=\"noreferrer noopener\" href=\"https:\/\/freelance-career.jp\/\" 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