{"id":362,"date":"2010-05-16T01:17:22","date_gmt":"2010-05-16T01:17:22","guid":{"rendered":"http:\/\/blog.rutake.com\/myblog\/techmemo\/?p=362"},"modified":"2010-05-16T01:17:22","modified_gmt":"2010-05-16T01:17:22","slug":"%e6%9d%a1%e4%bb%b6%e6%96%87-%e3%81%a8-%e3%81%a8-%e3%81%ae%e9%81%95%e3%81%84","status":"publish","type":"post","link":"https:\/\/blog.rutake.com\/techmemo\/2010\/05\/16\/%e6%9d%a1%e4%bb%b6%e6%96%87-%e3%81%a8-%e3%81%a8-%e3%81%ae%e9%81%95%e3%81%84\/","title":{"rendered":"\u6761\u4ef6\u6587 [&& \u3068 &] [|| \u3068 |] \u306e\u9055\u3044"},"content":{"rendered":"

\u666e\u6bb5\u306a\u306b\u3052\u306a\u304f\u4f7f\u3063\u3066\u3044\u3066\u3082\u6319\u52d5\u306e\u9055\u3044\u3092\u3088\u304f\u308f\u304b\u3063\u3066\u3044\u306a\u3044\u3082\u306e<\/p>\n

&&\u3060\u3068\u7701\u30a8\u30cd\u5224\u5b9a\u30e2\u30fc\u30c9\u3067<\/p>\n

A && B<\/p>\n

\u306e\u6761\u4ef6\u306e\u6642A\u306e\u6761\u4ef6\u304c\u6e80\u305f\u3055\u308c\u306a\u3051\u308c\u3070B\u306f\u8a55\u4fa1\u3055\u308c\u306a\u3044\u3002<\/p>\n

\u3064\u307e\u308aJava\u3067\u3044\u3046\u306a\u3089<\/p>\n

if (obj !=null && obj.equals(obj2)) {<\/p>\n

}<\/p>\n

obj\u304cnull\u306e\u6642\u306b\u306f\u53f3\u306eequals\u306f\u5b9f\u65bd\u3055\u308c\u306a\u3044\u3002<\/p>\n

\u9006\u306b&\u3060\u3068\u5165\u5ff5\u306b\u8abf\u3079\u308b\u77f3\u6a4b\u3092\u305f\u305f\u3044\u3066\u6e21\u308b\u30e2\u30fc\u30c9\u306a\u306e\u3067<\/p>\n

A\u3082B\u3082\u898b\u3066\u304b\u3089AND\u6761\u4ef6\u3092\u5224\u5b9a\u3059\u308b\u3002\u3057\u304b\u3057\u3053\u308c\u3060\u3068\u4e0a\u8a18\u306e\u5f0f\u3067obj\u304cNULL\u3060\u3063\u305f\u6642NullPointerException\u304c\u3067\u3066\u3057\u307e\u3046\u3002<\/p>\n

[|| \u3068 |]\u306b\u3064\u3044\u3066\u3082\u9055\u3044\u306f\u540c\u69d8\u3002<\/p>\n

\u65e5\u5e38\u3067\u306f&&\u306e\u65b9\u304c\u3088\u304f\u4f7f\u3046\u3068\u601d\u3046\u3051\u3069\u7686\u3055\u3093\u306f\u3069\u3046\u304b\u306a\uff1f<\/p>\n","protected":false},"excerpt":{"rendered":"

\u666e\u6bb5\u306a\u306b\u3052\u306a\u304f\u4f7f\u3063\u3066\u3044\u3066\u3082\u6319\u52d5\u306e\u9055\u3044\u3092\u3088\u304f\u308f\u304b\u3063\u3066\u3044\u306a\u3044\u3082\u306e &&amp … \u7d9a\u304d\u3092\u8aad\u3080 →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[17],"tags":[],"_links":{"self":[{"href":"https:\/\/blog.rutake.com\/techmemo\/wp-json\/wp\/v2\/posts\/362"}],"collection":[{"href":"https:\/\/blog.rutake.com\/techmemo\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.rutake.com\/techmemo\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.rutake.com\/techmemo\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.rutake.com\/techmemo\/wp-json\/wp\/v2\/comments?post=362"}],"version-history":[{"count":0,"href":"https:\/\/blog.rutake.com\/techmemo\/wp-json\/wp\/v2\/posts\/362\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.rutake.com\/techmemo\/wp-json\/wp\/v2\/media?parent=362"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.rutake.com\/techmemo\/wp-json\/wp\/v2\/categories?post=362"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.rutake.com\/techmemo\/wp-json\/wp\/v2\/tags?post=362"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}