{"version":"1.0","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Firof.hateblo.jp%2Fentry%2F2025%2F08%2F05%2F202226\" title=\"Objects.requireNonNull\u3092\u4f7f\u308f\u306a\u3044\u65b9\u304c\u307e\u3057\u306a\u5834\u5408\u304c\u3042\u308b\u8a71 - \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>","blog_title":"\u65e5\u3005\u5e38\u3005","type":"rich","author_url":"https://blog.hatena.ne.jp/irof/","provider_name":"Hatena Blog","provider_url":"https://hatena.blog","width":"100%","author_name":"irof","title":"Objects.requireNonNull\u3092\u4f7f\u308f\u306a\u3044\u65b9\u304c\u307e\u3057\u306a\u5834\u5408\u304c\u3042\u308b\u8a71","blog_url":"https://irof.hateblo.jp/","description":"\u3053\u3046\u8a00\u3046\u306e\u304c\u3042\u3063\u3066\u3002 class Hoge { public static void main(String[] args) { Object hoge = null; hoge.toString(); } } \u5b9f\u884c\u3059\u308b\u3068\u5f53\u7136NPE\u306b\u306a\u308b\u3093\u3060\u3051\u3069\u3001\u3053\u3093\u306a\u611f\u3058\u3067\u51fa\u308b\u3002 % java Hoge.java Exception in thread \"main\" java.lang.NullPointerException: Cannot invoke \"Object.toString()\" because \"<local1>\" is null at Hoge.main(Hoge.java:8) \u4e00\u6614\u524d\u2026","published":"2025-08-05 20:22:26","height":"190","categories":["Java"],"url":"https://irof.hateblo.jp/entry/2025/08/05/202226","image_url":null}