{"height":"190","title":"Java\u30671\u884c\u3067Null\u8a31\u5bb9\u306e\u914d\u5217\u3092\u4f5c\u308a\u305f\u304b\u3063\u305f","blog_url":"https://nainaistar.hatenablog.com/","version":"1.0","published":"2023-01-23 12:00:00","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fnainaistar.hatenablog.com%2Fentry%2Fone-liner-nullable-collection-in-java\" title=\"Java\u30671\u884c\u3067Null\u8a31\u5bb9\u306e\u914d\u5217\u3092\u4f5c\u308a\u305f\u304b\u3063\u305f - \u304d\u308a\u4e38\u306e\u6280\u8853\u65e5\u8a18\" 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/nainaistar/","provider_name":"Hatena Blog","width":"100%","author_name":"nainaistar","blog_title":"\u304d\u308a\u4e38\u306e\u6280\u8853\u65e5\u8a18","url":"https://nainaistar.hatenablog.com/entry/one-liner-nullable-collection-in-java","image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/n/nainaistar/20230115/20230115215938.png","type":"rich","description":"\u7d50\u5c40\u3001\u9858\u3063\u305f\u3068\u304a\u308a\u306b\u52d5\u304b\u306a\u304b\u3063\u305f\u306e\u3067\u3001\u601d\u8003\u932f\u8aa4\u3057\u305f\u3068\u304d\u306e\u30e1\u30e2\u3060\u3051\u6b8b\u3057\u307e\u3059\u3002 \u74b0\u5883 Java 17 \u5bfe\u5fdc Collections.singletonList(T o)\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u30011\u884c\u3067null\u8a31\u5bb9\u3057\u305f\u914d\u5217\u3092\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002 \u52d5\u4f5c\u78ba\u8a8d 1\u884c\u3067\u914d\u5217\u3092\u4f5c\u6210\u3059\u308b\u65b9\u6cd5\u306f\u3001List.of(), Arrays.asList\u306e\u3069\u3061\u3089\u3082\u3042\u308a\u307e\u3059\u304c\u3001NotNull\u5236\u7d04\u304c\u3042\u308b\u306e\u3067\u3001\u4f5c\u6210\u3067\u304d\u307e\u305b\u3093\u3002 ArrayList\u306fnull\u3082\u8ffd\u52a0\u53ef\u80fd\u3067\u3059\u304c\u3001\u521d\u671f\u914d\u5217\u306e\u4f5c\u6210\u6642\u306b\u306f\u4f7f\u3048\u307e\u305b\u3093\u3002\u305d\u3082\u305d\u3082\u3001\u521d\u671f\u914d\u5217\u306e\u4f5c\u6210\u6642\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u81ea\u4f53\u304c\u914d\u5217\u3068\u306a\u308b\u305f\u3081\u3001\u5185\u90e8\u51e6\u7406\u306b\u3066\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3059\u3002 var sample = new ArrayL\u2026","categories":["Java","\u6280\u8853"],"provider_url":"https://hatena.blog"}