Example usage for java.time.chrono Chronology date

Introduction

In this page you can find the example usage for java.time.chrono Chronology date.

Prototype

ChronoLocalDate date(TemporalAccessor temporal);

Source Link

Document

Obtains a local date in this chronology from another temporal object.

Usage

From source file:Main.java

/**
 * Converts a LocalDate (ISO) value to a ChronoLocalDate date using the
 * provided Chronology, and then formats the ChronoLocalDate to a String using
 * a DateTimeFormatter with a SHORT pattern based on the Chronology and the
 * current Locale./*from   w  w w.j a  v  a2 s  .  co  m*/
 *
 * @param localDate
 *          - the ISO date to convert and format.
 * @param chrono
 *          - an optional Chronology. If null, then IsoChronology is used.
 */
public static String toString(LocalDate localDate, Chronology chrono) {
    if (localDate != null) {
        Locale locale = Locale.getDefault(Locale.Category.FORMAT);
        ChronoLocalDate cDate;
        if (chrono == null) {
            chrono = IsoChronology.INSTANCE;
        }
        try {
            cDate = chrono.date(localDate);
        } catch (DateTimeException ex) {
            System.err.println(ex);
            chrono = IsoChronology.INSTANCE;
            cDate = localDate;
        }
        String pattern = "M/d/yyyy GGGGG";
        DateTimeFormatter dateFormatter = DateTimeFormatter.ofPattern(pattern);
        return dateFormatter.format(cDate);
    } else {
        return "";
    }
}

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From source file:Main.java

/**
 * Parses a String to a ChronoLocalDate using a DateTimeFormatter with a short
 * pattern based on the current Locale and the provided Chronology, then
 * converts this to a LocalDate (ISO) value.
 *
 * @param text/* w  ww.  j ava 2 s .  com*/
 *          - the input date text in the SHORT format expected for the
 *          Chronology and the current Locale.
 *
 * @param chrono
 *          - an optional Chronology. If null, then IsoChronology is used.
 */
public static LocalDate fromString(String text, Chronology chrono) {
    if (text != null && !text.isEmpty()) {
        Locale locale = Locale.getDefault(Locale.Category.FORMAT);
        if (chrono == null) {
            chrono = IsoChronology.INSTANCE;
        }
        String pattern = "M/d/yyyy GGGGG";
        DateTimeFormatter df = new DateTimeFormatterBuilder().parseLenient().appendPattern(pattern)
                .toFormatter().withChronology(chrono).withDecimalStyle(DecimalStyle.of(locale));
        TemporalAccessor temporal = df.parse(text);
        ChronoLocalDate cDate = chrono.date(temporal);
        return LocalDate.from(cDate);
    }
    return null;
}

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