{"type":"rich","provider_url":"https://hatena.blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fwww.sakatakoichi.com%2Fentry%2F20061002%2F1159776883\" title=\"\u3053\u306e\u5f8c\u8f29\u3088\u304f\u52c9\u5f37\u3057\u3066\u308b\u304b\u3082\uff01\u3068\u601d\u3046\u30b3\u30fc\u30c9 - Fight the Future\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","height":"190","image_url":null,"version":"1.0","title":"\u3053\u306e\u5f8c\u8f29\u3088\u304f\u52c9\u5f37\u3057\u3066\u308b\u304b\u3082\uff01\u3068\u601d\u3046\u30b3\u30fc\u30c9","url":"https://www.sakatakoichi.com/entry/20061002/1159776883","width":"100%","author_url":"https://blog.hatena.ne.jp/jyukutyo/","description":"if (variable.equals(A_CONSTANT)) { // \u51e6\u7406 }\u2191\u3063\u3066\u66f8\u304f\u5f8c\u8f29\u591a\u3044\u304b\u306a\u3002 if (A_CONSTANT.equals(variable)) { // \u51e6\u7406 }\u2191\u3063\u3066\uff08\u8003\u3048\u3066\uff09\u66f8\u304f\u5f8c\u8f29\u3060\u3068\uff08\u50d5\u306a\u3089\uff09\u3088\u304f\u52c9\u5f37\u3057\u3066\u308b\u306a\u3063\u3066\u601d\u3046\u3060\u308d\u3046\u306a\u3002 \u7406\u7531\u306f\u6700\u521d\u306e\u30b3\u30fc\u30c9\u3060\u3068 variable \u304c null \u3060\u3068 NullPointerException \u3067\u843d\u3061\u3061\u3083\u3046\u304b\u3089\u3063\u3066\u3044\u3046\u305f\u3044\u3057\u305f\u3053\u3068\u306a\u3044\u7406\u7531\u3067\u306f\u3042\u308b\u3093\u3060\u3051\u3069\u3001\u3053\u3046\u3044\u3046\u3053\u3068\u3063\u3066\u4f55\u304b\u672c\u3092\u8aad\u3093\u3060\u308a\u8003\u3048\u3066\u30b3\u30fc\u30c9\u3092\u66f8\u304b\u306a\u3044\u3068\u6c17\u3065\u304b\u306a\u3044\u304b\u3089\u3002 \u50d5\u3082\u300e\u5b9f\u8df5J2EE\u30b7\u30b9\u30c6\u30e0\u30c7\u30b6\u30a4\u30f3\u300f\u7b2c4\u7ae0\u8aad\u3080\u307e\u3067\u8003\u3048\u305f\u3053\u3068\u3082\u306a\u304b\u3063\u305f\u304b\u3089\u4f55\u3082\u3048\u3089\u305d\u3046\u306b\u8a00\u3048\u2026","author_name":"jyukutyo","blog_url":"https://www.sakatakoichi.com/","categories":["programming"],"published":"2006-10-03 09:14:43","blog_title":"Fight the Future","provider_name":"Hatena Blog"}