新元号に対応したjdkは今後リリースされるはずだけど、そんな簡単にアップデートできない方(自分含む)に。 前提 Oracle JDK 8u92 $JAVA_HOME設定済み 諸々文字コードはutf-8 確認用コード import java.text.*; import java.util.*; public class JapaneseEra { public static void main(String[] args) throws ParseException { DateFormat df = new SimpleDateFormat("GGGGy年M月d日", new Locale("ja", "JP", "JP")); System.out.println(df.format(new Date(System.currentTimeMillis()))); System.out.
![Javaで新元号に対応する - Qiita](https://cdn-ak-scissors.b.st-hatena.com/image/square/faf81dea8eb0ff744a4f8fa788f1cc13be1d5360/height=288;version=1;width=512/https%3A%2F%2Fqiita-user-contents.imgix.net%2Fhttps%253A%252F%252Fcdn.qiita.com%252Fassets%252Fpublic%252Farticle-ogp-background-412672c5f0600ab9a64263b751f1bc81.png%3Fixlib%3Drb-4.0.0%26w%3D1200%26mark64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTk3MiZoPTM3OCZ0eHQ9SmF2YSVFMyU4MSVBNyVFNiU5NiVCMCVFNSU4NSU4MyVFNSU4RiVCNyVFMyU4MSVBQiVFNSVBRiVCRSVFNSVCRiU5QyVFMyU4MSU5OSVFMyU4MiU4QiZ0eHQtYWxpZ249bGVmdCUyQ3RvcCZ0eHQtY29sb3I9JTIzMjEyMTIxJnR4dC1mb250PUhpcmFnaW5vJTIwU2FucyUyMFc2JnR4dC1zaXplPTU2JnM9MGQ1MGMzY2QwODZjNTAxYWJkNzYyN2U0ODE5NzhkYzA%26mark-x%3D142%26mark-y%3D57%26blend64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZoPTc2Jnc9NzcwJnR4dD0lNDBuaXNoaW0mdHh0LWNvbG9yPSUyMzIxMjEyMSZ0eHQtZm9udD1IaXJhZ2lubyUyMFNhbnMlMjBXNiZ0eHQtc2l6ZT0zNiZ0eHQtYWxpZ249bGVmdCUyQ3RvcCZzPTRmZjk3ZDNjM2I5MGE2ZTY4YTEzZjc5Njg4MTJhMGVm%26blend-x%3D142%26blend-y%3D486%26blend-mode%3Dnormal%26s%3Db38abe928959817a67f09cdaddb39ed9)