{"type":"rich","url":"https://ky-yk-d.hatenablog.com/entry/2019/06/16/235913","author_url":"https://blog.hatena.ne.jp/ky_yk_d/","width":"100%","title":"Java\u306b\u304a\u3051\u308bOptional\u306b\u3088\u308bnull\u5b89\u5168\u306e\u305f\u3081\u306e\u899a\u66f8","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fky-yk-d.hatenablog.com%2Fentry%2F2019%2F06%2F16%2F235913\" title=\"Java\u306b\u304a\u3051\u308bOptional\u306b\u3088\u308bnull\u5b89\u5168\u306e\u305f\u3081\u306e\u899a\u66f8 - \u3053\u307e\u3076\u308d\" 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","categories":["Java"],"author_name":"ky_yk_d","provider_url":"https://hatena.blog","blog_url":"https://ky-yk-d.hatenablog.com/","published":"2019-06-16 23:59:13","blog_title":"\u3053\u307e\u3076\u308d","version":"1.0","image_url":"https://cdn.blog.st-hatena.com/images/theme/og-image-1500.png","provider_name":"Hatena Blog","description":"Java8\u304b\u3089\u5c0e\u5165\u3055\u308c\u305fOptional\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308anull\u5b89\u5168\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u305f\u3060\u3057\u3001\u4f7f\u3044\u65b9\u3092\u9593\u9055\u3048\u308b\u3068\u304b\u3048\u3063\u3066\u30d0\u30b0\u3092\u751f\u3080\u3053\u3068\u306b\u3082\u7e4b\u304c\u308b\u3002\u9069\u5207\u306b\u5229\u7528\u3059\u308b\u305f\u3081\u306e\u899a\u66f8\u3092\u66f8\u304f\u3002 null\u3092\u8fd4\u3059\u53ef\u80fd\u6027\u306e\u3042\u308b\u30e1\u30bd\u30c3\u30c9\u306f\u3001Optional\u578b\u3092\u8fd4\u3059\u30e1\u30bd\u30c3\u30c9\u306b\u5909\u66f4\u3059\u308b \u3053\u308c\u304c\u30d9\u30fc\u30b9\u306b\u306a\u308b\u3002Optional\u304c\u5c0e\u5165\u3055\u308c\u308b\u307e\u3067\u306f\u3001null\u3092\u8fd4\u3059\u53ef\u80fd\u6027\u306e\u3042\u308b\u30e1\u30bd\u30c3\u30c9\u3068\u8fd4\u3059\u53ef\u80fd\u6027\u306e\u306a\u3044\u30e1\u30bd\u30c3\u30c9\u306f\u8a00\u8a9e\u306e\u4e0a\u3067\u306f\u533a\u5225\u3067\u304d\u306a\u304b\u3063\u305f\u3002\u305d\u306e\u305f\u3081\u3001null\u3092\u8fd4\u3059\u304b\u3082\u3057\u308c\u306a\u3044\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059\u969b\u306b\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30de\u304c\u305d\u308c\u3092\u610f\u8b58\u3057\u305f\u4e0a\u3067\u3001\u547c\u3073\u51fa\u3057\u5143\u306e\u65b9\u3067null\u30c1\u30a7\u30c3\u30af\u3092\u66f8\u304f\u5fc5\u8981\u304c\u3042\u3063\u305f*1\u3002 Optional\u3092\u8fd4\u3059\u2026"}