{"blog_url":"https://daisuke-m.hatenablog.com/","blog_title":"\u90fd\u5143\u30c0\u30a4\u30b9\u30b1 IT-PRESS","image_url":null,"type":"rich","url":"https://daisuke-m.hatenablog.com/entry/20080208/1202450144","width":"100%","provider_url":"https://hatena.blog","title":"\u3063\u3066\u3001\u3053\u308c\u30c0\u30e1\u3058\u3083\u306d\uff1f","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fdaisuke-m.hatenablog.com%2Fentry%2F20080208%2F1202450144\" title=\"\u3063\u3066\u3001\u3053\u308c\u30c0\u30e1\u3058\u3083\u306d\uff1f - \u90fd\u5143\u30c0\u30a4\u30b9\u30b1 IT-PRESS\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","categories":["Java"],"height":"190","published":"2008-02-08 14:55:44","author_url":"https://blog.hatena.ne.jp/daisuke-m/","provider_name":"Hatena Blog","description":"\u5148\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u306e\u7d9a\u304d\u3002 \u30de\u30c3\u30d7\u304c\u3053\u306e\u30ad\u30fc\u306e\u30de\u30c3\u30d4\u30f3\u30b0\u3092\u4fdd\u6301\u3057\u3066\u3044\u306a\u3044\u5834\u5408\u306f null \u3092\u8fd4\u3057\u307e\u3059\u3002 http://sdc.sun.co.jp/java/docs/j2se/1.4/ja/docs/ja/api/java/util/Map.html#get(java.lang.Object) \u3053\u308c\u306f\u3001java.util.Map \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306e\u4ed5\u69d8\u306a\u8a33\u3067\u3059\u3002\u3059\u306a\u308f\u3061\u3001\u3053\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3092\u5b9f\u88c5\u3057\u305f\u30af\u30e9\u30b9\u306f\u3001Map\u578b\u3067\u53d7\u3051\u53d6\u308c\u308b\u3093\u3067\u3059\u3088\u306d\u3002\u3064\u307e\u308a\u3001Map\u306e\u4ed5\u69d8\u3092\u6e80\u305f\u3057\u3066\u3044\u306a\u3051\u308c\u3070\u554f\u984c\u304c\u3042\u308b\u306e\u3067\u306f\u306a\u3044\u304b\u3001\u3068\u6c17\u3065\u3044\u305f\u3002\u4e0a\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u306e\u69d8\u306a\u3001\u3061\u3087\u3063\u3068\u5f04\u3063\u305f\u5b9f\u88c5\uff08foo\u306e\u7121\u540d\u30af\u30e9\u30b9\u306b\u3088\u308b\u5b9f\u88c5\uff09\u3067\u3042\u3063\u3066\u3082\u2026","author_name":"daisuke-m","version":"1.0"}