{"blog_url":"https://irof.hateblo.jp/","url":"https://irof.hateblo.jp/entry/20110307/p1","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Firof.hateblo.jp%2Fentry%2F20110307%2Fp1\" title=\"String \u306e\u9023\u7d50\u30cd\u30bf\u306e\u7d9a\u304d - \u65e5\u3005\u5e38\u3005\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_url":"https://blog.hatena.ne.jp/irof/","description":"\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u306f\u3069\u3046\u306a\u308b\u3067\u3057\u3087\u3046\u3002\u3053\u305f\u3048\u306f\u4e00\u756a\u4e0b\u3002 String str = null; str += new Object(); System.out.println(str); http://d.hatena.ne.jp/irof/20110305/p1 \u306e\u7d9a\u304d\u3063\u307d\u3044\u4f55\u304b\u3002 \u5f15\u3063\u5f35\u308a\u3059\u304e\u3060\u3068\u601d\u308f\u306a\u304f\u3082\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u601d\u3046\u3068\u3053\u308d\u306f\u66f8\u3044\u3066\u304a\u3053\u3046\u3068\u601d\u3044\u307e\u3059\u3002\u305d\u306e\u524d\u306b\u8cea\u554f\u6587\u304c\u5909\u308f\u3063\u3066\u3044\u305f\u306e\u3067\u518d\u56de\u7b54\u3002 Q2. \u6587\u5b57\u5217\u306e+\u6f14\u7b97\u5b50\u306b\u3088\u308b\u9023\u7d50\u3068StringBuilder\u3092\u4f7f\u3063\u305f\u9023\u7d50\u306e\u9055\u3044\u3092\u8aac\u660e\u305b\u3088\u3002 A2. String\u306f\u4e0d\u5909\u306a\u306e\u3067\u9023\u7d50\u3057\u305f\u65b0\u3057\u3044\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u4f5c\u3089\u308c\u308b\u3002StringBuilder\u306f\u53ef\u5909\u306a\u306e\u3067\u5909\u2026","provider_name":"Hatena Blog","title":"String \u306e\u9023\u7d50\u30cd\u30bf\u306e\u7d9a\u304d","published":"2011-03-07 00:00:00","type":"rich","blog_title":"\u65e5\u3005\u5e38\u3005","version":"1.0","categories":["Java"],"author_name":"irof","provider_url":"https://hatena.blog","height":"190","image_url":null,"width":"100%"}