[Java]DateTimeFormatterのFormatStyle別出力

ロケールを日本

        Locale locale = Locale.JAPAN;
        LocalDateTime now = LocalDateTime.now();

出力プログラム

ofLocalizedDateTimeでフォーマットを行う。

        System.out.println(
                now.format(DateTimeFormatter.ofLocalizedDateTime(FormatStyle.FULL).withLocale(locale))
        );
        System.out.println(
                now.format(DateTimeFormatter.ofLocalizedDateTime(FormatStyle.LONG).withLocale(locale))
        );
        System.out.println(
                now.format(DateTimeFormatter.ofLocalizedDateTime(FormatStyle.MEDIUM).withLocale(locale))
        );
        System.out.println(
                now.format(DateTimeFormatter.ofLocalizedDateTime(FormatStyle.SHORT).withLocale(locale))
        );

実行結果(上から、FULL, LONG, MEDIUM, SHORT)

java.time.DateTimeException: Unable to extract ZoneId from temporal 2019-07-01T07:58:21.538531
java.time.DateTimeException: Unable to extract ZoneId from temporal 2019-07-01T07:58:21.538531
2019/07/01 7:59:30
2019/07/01 7:59

ロケールをアメリカ

実行結果(上から、FULL, LONG, MEDIUM, SHORT)

java.time.DateTimeException: Unable to extract ZoneId from temporal 2019-07-01T07:58:21.538531
java.time.DateTimeException: Unable to extract ZoneId from temporal 2019-07-01T07:58:21.538531
Jul 1, 2019, 7:57:26 AM
7/1/19, 7:57 AM