{"width":"100%","url":"https://vist764.hatenablog.com/entry/2022/05/11/122446","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fvist764.hatenablog.com%2Fentry%2F2022%2F05%2F11%2F122446\" title=\"\u3010Java\u3011null\u30c1\u30a7\u30c3\u30af - \u30a2\u30eb\u30d1\u30ab\u30ce\u30d5\u30f3\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","provider_name":"Hatena Blog","author_url":"https://blog.hatena.ne.jp/vist764/","description":"Null\u30c1\u30a7\u30c3\u30af isNull/nonNull ==null/!=null \u7a7a\u6587\u5b57\u30c1\u30a7\u30c3\u30af isEmpty ==\"\"/!=\"\" \u7a7a\u6587\u5b57\uff0b\u7a7a\u767d\u30c1\u30a7\u30c3\u30af isBlank Null\uff0b\u7a7a\u6587\u5b57\u30c1\u30a7\u30c3\u30af isEmpty/isNotEmpty Null\uff0b\u7a7a\u6587\u5b57\uff0b\u7a7a\u767d\u30c1\u30a7\u30c3\u30af isBlank/isNotBlank Null\u30c1\u30a7\u30c3\u30af isNull/nonNull \u203bnonNull\u306f\u7d50\u679c\u304c\u9006\u306b\u306a\u308b \u203bJava 8\u4ee5\u964d\u306e\u307f Objects.isNull(hoge) Objects.nonNull(hoge) \u5024 \u7d50\u679c null true \"\" false \" \" false \" \" false ==null/!=n\u2026","image_url":null,"blog_url":"https://vist764.hatenablog.com/","title":"\u3010Java\u3011null\u30c1\u30a7\u30c3\u30af","height":"190","categories":["\u2605\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0","\u30fbJava"],"blog_title":"\u30a2\u30eb\u30d1\u30ab\u30ce\u30d5\u30f3","version":"1.0","published":"2022-05-11 12:24:46","type":"rich","author_name":"vist764","provider_url":"https://hatena.blog"}