relativedateformat.java

jfreechart-1.0.12.zip 可以用来作图

     */
    public String getDaySuffix() {
        return this.daySuffix;
    }

    /**
     * Sets the string that is appended to the day count.
     *
     * @param suffix  the suffix (<code>null</code> not permitted).
     *
     * @see #getDaySuffix()
     */
    public void setDaySuffix(String suffix) {
        if (suffix == null) {
            throw new IllegalArgumentException("Null 'suffix' argument.");
        }
        this.daySuffix = suffix;
    }

    /**
     * Sets the formatter for the hours.
     *
     * @param formatter  the formatter (<code>null</code> not permitted).
     *
     * @since 1.0.11
     */
    public void setHourFormatter(NumberFormat formatter) {
        if (formatter == null) {
            throw new IllegalArgumentException("Null 'formatter' argument.");
        }
        this.hourFormatter = formatter;
    }

    /**
     * Returns the string that is appended to the hour count.
     *
     * @return The string.
     *
     * @see #setHourSuffix(String)
     */
    public String getHourSuffix() {
        return this.hourSuffix;
    }

    /**
     * Sets the string that is appended to the hour count.
     *
     * @param suffix  the suffix (<code>null</code> not permitted).
     *
     * @see #getHourSuffix()
     */
    public void setHourSuffix(String suffix) {
        if (suffix == null) {
            throw new IllegalArgumentException("Null 'suffix' argument.");
        }
        this.hourSuffix = suffix;
    }

    /**
     * Sets the formatter for the minutes.
     *
     * @param formatter  the formatter (<code>null</code> not permitted).
     *
     * @since 1.0.11
     */
    public void setMinuteFormatter(NumberFormat formatter) {
        if (formatter == null) {
            throw new IllegalArgumentException("Null 'formatter' argument.");
        }
        this.minuteFormatter = formatter;
    }

    /**
     * Returns the string that is appended to the minute count.
     *
     * @return The string.
     *
     * @see #setMinuteSuffix(String)
     */
    public String getMinuteSuffix() {
        return this.minuteSuffix;
    }

    /**
     * Sets the string that is appended to the minute count.
     *
     * @param suffix  the suffix (<code>null</code> not permitted).
     *
     * @see #getMinuteSuffix()
     */
    public void setMinuteSuffix(String suffix) {
        if (suffix == null) {
            throw new IllegalArgumentException("Null 'suffix' argument.");
        }
        this.minuteSuffix = suffix;
    }

    /**
     * Returns the string that is appended to the second count.
     *
     * @return The string.
     *
     * @see #setSecondSuffix(String)
     */
    public String getSecondSuffix() {
        return this.secondSuffix;
    }

    /**
     * Sets the string that is appended to the second count.
     *
     * @param suffix  the suffix (<code>null</code> not permitted).
     *
     * @see #getSecondSuffix()
     */
    public void setSecondSuffix(String suffix) {
        if (suffix == null) {
            throw new IllegalArgumentException("Null 'suffix' argument.");
        }
        this.secondSuffix = suffix;
    }

    /**
     * Sets the formatter for the seconds and milliseconds.
     *
     * @param formatter  the formatter (<code>null</code> not permitted).
     */
    public void setSecondFormatter(NumberFormat formatter) {
        if (formatter == null) {
            throw new IllegalArgumentException("Null 'formatter' argument.");
        }
        this.secondFormatter = formatter;
    }

    /**
     * Formats the given date as the amount of elapsed time (relative to the
     * base date specified in the constructor).
     *
     * @param date  the date.
     * @param toAppendTo  the string buffer.
     * @param fieldPosition  the field position.
     *
     * @return The formatted date.
     */
    public StringBuffer format(Date date, StringBuffer toAppendTo,
                               FieldPosition fieldPosition) {
        long currentMillis = date.getTime();
        long elapsed = currentMillis - this.baseMillis;
        String signPrefix;
        if (elapsed < 0) {
            elapsed *= -1L;
            signPrefix = "-";
        }
        else {
            signPrefix = this.positivePrefix;
        }

        long days = elapsed / MILLISECONDS_IN_ONE_DAY;
        elapsed = elapsed - (days * MILLISECONDS_IN_ONE_DAY);
        long hours = elapsed / MILLISECONDS_IN_ONE_HOUR;
        elapsed = elapsed - (hours * MILLISECONDS_IN_ONE_HOUR);
        long minutes = elapsed / 60000L;
        elapsed = elapsed - (minutes * 60000L);
        double seconds = elapsed / 1000.0;

        toAppendTo.append(signPrefix);
        if (days != 0 || this.showZeroDays) {
            toAppendTo.append(this.dayFormatter.format(days) + getDaySuffix());
        }
        if (hours != 0 || this.showZeroHours) {
            toAppendTo.append(this.hourFormatter.format(hours)
                    + getHourSuffix());
        }
        toAppendTo.append(this.minuteFormatter.format(minutes)
                + getMinuteSuffix());
        toAppendTo.append(this.secondFormatter.format(seconds)
                + getSecondSuffix());
        return toAppendTo;
    }

    /**
     * Parses the given string (not implemented).
     *
     * @param source  the date string.
     * @param pos  the parse position.
     *
     * @return <code>null</code>, as this method has not been implemented.
     */
    public Date parse(String source, ParsePosition pos) {
        return null;
    }

    /**
     * Tests this formatter for equality with an arbitrary object.
     *
     * @param obj  the object (<code>null</code> permitted).
     *
     * @return A boolean.
     */
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (!(obj instanceof RelativeDateFormat)) {
            return false;
        }
        if (!super.equals(obj)) {
            return false;
        }
        RelativeDateFormat that = (RelativeDateFormat) obj;
        if (this.baseMillis != that.baseMillis) {
            return false;
        }
        if (this.showZeroDays != that.showZeroDays) {
            return false;
        }
        if (this.showZeroHours != that.showZeroHours) {
            return false;
        }
        if (!this.positivePrefix.equals(that.positivePrefix)) {
            return false;
        }
        if (!this.daySuffix.equals(that.daySuffix)) {
            return false;
        }
        if (!this.hourSuffix.equals(that.hourSuffix)) {
            return false;
        }
        if (!this.minuteSuffix.equals(that.minuteSuffix)) {
            return false;
        }
        if (!this.secondSuffix.equals(that.secondSuffix)) {
            return false;
        }
        if (!this.dayFormatter.equals(that.dayFormatter)) {
            return false;
        }
        if (!this.hourFormatter.equals(that.hourFormatter)) {
            return false;
        }
        if (!this.minuteFormatter.equals(that.minuteFormatter)) {
            return false;
        }
        if (!this.secondFormatter.equals(that.secondFormatter)) {
            return false;
        }
        return true;
    }

    /**
     * Returns a hash code for this instance.
     *
     * @return A hash code.
     */
    public int hashCode() {
        int result = 193;
        result = 37 * result
                + (int) (this.baseMillis ^ (this.baseMillis >>> 32));
        result = 37 * result + this.positivePrefix.hashCode();
        result = 37 * result + this.daySuffix.hashCode();
        result = 37 * result + this.hourSuffix.hashCode();
        result = 37 * result + this.minuteSuffix.hashCode();
        result = 37 * result + this.secondSuffix.hashCode();
        result = 37 * result + this.secondFormatter.hashCode();
        return result;
    }

    /**
     * Returns a clone of this instance.
     *
     * @return A clone.
     */
    public Object clone() {
        RelativeDateFormat clone = (RelativeDateFormat) super.clone();
        clone.dayFormatter = (NumberFormat) this.dayFormatter.clone();
        clone.secondFormatter = (NumberFormat) this.secondFormatter.clone();
        return clone;
    }

    /**
     * Some test code.
     *
     * @param args  ignored.
     */
    public static void main(String[] args) {
        GregorianCalendar c0 = new GregorianCalendar(2006, 10, 1, 0, 0, 0);
        GregorianCalendar c1 = new GregorianCalendar(2006, 10, 1, 11, 37, 43);
        c1.set(Calendar.MILLISECOND, 123);

        System.out.println("Default: ");
        RelativeDateFormat rdf = new RelativeDateFormat(c0.getTime().getTime());
        System.out.println(rdf.format(c1.getTime()));
        System.out.println();

        System.out.println("Hide milliseconds: ");
        rdf.setSecondFormatter(new DecimalFormat("0"));
        System.out.println(rdf.format(c1.getTime()));
        System.out.println();

        System.out.println("Show zero day output: ");
        rdf.setShowZeroDays(true);
        System.out.println(rdf.format(c1.getTime()));
        System.out.println();

        System.out.println("Alternative suffixes: ");
        rdf.setShowZeroDays(false);
        rdf.setDaySuffix(":");
        rdf.setHourSuffix(":");
        rdf.setMinuteSuffix(":");
        rdf.setSecondSuffix("");
        System.out.println(rdf.format(c1.getTime()));
        System.out.println();
    }
}