{"image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/i/irof/20260302/20260302233914.png","type":"rich","url":"https://irof.hateblo.jp/entry/2026/03/02/233604","author_url":"https://blog.hatena.ne.jp/irof/","provider_url":"https://hatena.blog","published":"2026-03-02 23:36:04","blog_url":"https://irof.hateblo.jp/","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Firof.hateblo.jp%2Fentry%2F2026%2F03%2F02%2F233604\" title=\"\u300c\u3044\u3061\u3070\u3093\u3081\u300d\u304c\u5927\u4e8b\u3067\u306a\u3044\u306a\u3089findFirst\u3088\u308afindAny\u3092\u4f7f\u3046 - \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>","description":"Java\u306e Stream \u306e\u8a71\u3067\u3059\u3002 Stream \u306f\u8907\u6570\u306e\u3082\u306e\u3092\u6271\u3044\u307e\u3059\u304c\u3001\u7d50\u679c\u304c1\u3064\uff08\u3082\u3057\u304f\u306f0 or 1\u500b\uff09\u3060\u3051\u6b32\u3057\u3044\u5834\u5408\u304c\u3088\u304f\u3042\u308a\u307e\u3059\u3002 \u3053\u3046\u3044\u3046\u6642\u306b\u4f7f\u7528\u3067\u304d\u308b\u306e\u304c findFirst \u3068 findAny \u3067\u3059\u3002 jshell> Stream.of(\"hoge\", \"fuga\", \"piyo\").findFirst() $1 ==> Optional[hoge] jshell> Stream.of(\"hoge\", \"fuga\", \"piyo\").findAny() $2 ==> Optional[hoge] \u7d50\u679c\u306f\u540c\u3058\u3067\u3001\u5148\u982d\u306e \"hoge\" \u304c\u8fd4\u3063\u3066\u3044\u307e\u3059\u3002find\u306a\u3093\u3067 Optio\u2026","blog_title":"\u65e5\u3005\u5e38\u3005","height":"190","title":"\u300c\u3044\u3061\u3070\u3093\u3081\u300d\u304c\u5927\u4e8b\u3067\u306a\u3044\u306a\u3089findFirst\u3088\u308afindAny\u3092\u4f7f\u3046","width":"100%","categories":["Java"],"author_name":"irof","version":"1.0"}