+ * A significant part of dealing with dates and times is the localization. + * This class acts as a central point for accessing the information. + * + *
+ * This uses standard ASCII characters for zero, positive, negative and a dot for the decimal point.
+ */
+ public static final DateTimeFormatSymbols STANDARD = new DateTimeFormatSymbols('0', '+', '-', '.');
+ /**
+ * The cache of symbols instances.
+ */
+ private static final ConcurrentMap
+ * The locale 'en_US' will always be present.
+ *
+ * @return an array of locales for which localization is supported
+ */
+ public static Locale[] getAvailableLocales() {
+ return DecimalFormatSymbols.getAvailableLocales();
+ }
+
+ /**
+ * Obtains symbols for the default locale.
+ *
+ * This method provides access to locale sensitive symbols.
+ *
+ * @return the info, not null
+ */
+ public static DateTimeFormatSymbols ofDefaultLocale() {
+ return of(Locale.getDefault(Locale.Category.FORMAT));
+ }
+
+ /**
+ * Obtains symbols for the specified locale.
+ *
+ * This method provides access to locale sensitive symbols.
+ *
+ * @param locale the locale, not null
+ * @return the info, not null
+ */
+ public static DateTimeFormatSymbols of(Locale locale) {
+ Objects.requireNonNull(locale, "locale");
+ DateTimeFormatSymbols info = CACHE.get(locale);
+ if (info == null) {
+ info = create(locale);
+ CACHE.putIfAbsent(locale, info);
+ info = CACHE.get(locale);
+ }
+ return info;
+ }
+
+ private static DateTimeFormatSymbols create(Locale locale) {
+ DecimalFormatSymbols oldSymbols = DecimalFormatSymbols.getInstance(locale);
+ char zeroDigit = oldSymbols.getZeroDigit();
+ char positiveSign = '+';
+ char negativeSign = oldSymbols.getMinusSign();
+ char decimalSeparator = oldSymbols.getDecimalSeparator();
+ if (zeroDigit == '0' && negativeSign == '-' && decimalSeparator == '.') {
+ return STANDARD;
+ }
+ return new DateTimeFormatSymbols(zeroDigit, positiveSign, negativeSign, decimalSeparator);
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Restricted constructor.
+ *
+ * @param zeroChar the character to use for the digit of zero
+ * @param positiveSignChar the character to use for the positive sign
+ * @param negativeSignChar the character to use for the negative sign
+ * @param decimalPointChar the character to use for the decimal point
+ */
+ private DateTimeFormatSymbols(char zeroChar, char positiveSignChar, char negativeSignChar, char decimalPointChar) {
+ this.zeroDigit = zeroChar;
+ this.positiveSign = positiveSignChar;
+ this.negativeSign = negativeSignChar;
+ this.decimalSeparator = decimalPointChar;
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Gets the character that represents zero.
+ *
+ * The character used to represent digits may vary by culture.
+ * This method specifies the zero character to use, which implies the characters for one to nine.
+ *
+ * @return the character for zero
+ */
+ public char getZeroDigit() {
+ return zeroDigit;
+ }
+
+ /**
+ * Returns a copy of the info with a new character that represents zero.
+ *
+ * The character used to represent digits may vary by culture.
+ * This method specifies the zero character to use, which implies the characters for one to nine.
+ *
+ * @param zeroDigit the character for zero
+ * @return a copy with a new character that represents zero, not null
+
+ */
+ public DateTimeFormatSymbols withZeroDigit(char zeroDigit) {
+ if (zeroDigit == this.zeroDigit) {
+ return this;
+ }
+ return new DateTimeFormatSymbols(zeroDigit, positiveSign, negativeSign, decimalSeparator);
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Gets the character that represents the positive sign.
+ *
+ * The character used to represent a positive number may vary by culture.
+ * This method specifies the character to use.
+ *
+ * @return the character for the positive sign
+ */
+ public char getPositiveSign() {
+ return positiveSign;
+ }
+
+ /**
+ * Returns a copy of the info with a new character that represents the positive sign.
+ *
+ * The character used to represent a positive number may vary by culture.
+ * This method specifies the character to use.
+ *
+ * @param positiveSign the character for the positive sign
+ * @return a copy with a new character that represents the positive sign, not null
+ */
+ public DateTimeFormatSymbols withPositiveSign(char positiveSign) {
+ if (positiveSign == this.positiveSign) {
+ return this;
+ }
+ return new DateTimeFormatSymbols(zeroDigit, positiveSign, negativeSign, decimalSeparator);
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Gets the character that represents the negative sign.
+ *
+ * The character used to represent a negative number may vary by culture.
+ * This method specifies the character to use.
+ *
+ * @return the character for the negative sign
+ */
+ public char getNegativeSign() {
+ return negativeSign;
+ }
+
+ /**
+ * Returns a copy of the info with a new character that represents the negative sign.
+ *
+ * The character used to represent a negative number may vary by culture.
+ * This method specifies the character to use.
+ *
+ * @param negativeSign the character for the negative sign
+ * @return a copy with a new character that represents the negative sign, not null
+ */
+ public DateTimeFormatSymbols withNegativeSign(char negativeSign) {
+ if (negativeSign == this.negativeSign) {
+ return this;
+ }
+ return new DateTimeFormatSymbols(zeroDigit, positiveSign, negativeSign, decimalSeparator);
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Gets the character that represents the decimal point.
+ *
+ * The character used to represent a decimal point may vary by culture.
+ * This method specifies the character to use.
+ *
+ * @return the character for the decimal point
+ */
+ public char getDecimalSeparator() {
+ return decimalSeparator;
+ }
+
+ /**
+ * Returns a copy of the info with a new character that represents the decimal point.
+ *
+ * The character used to represent a decimal point may vary by culture.
+ * This method specifies the character to use.
+ *
+ * @param decimalSeparator the character for the decimal point
+ * @return a copy with a new character that represents the decimal point, not null
+ */
+ public DateTimeFormatSymbols withDecimalSeparator(char decimalSeparator) {
+ if (decimalSeparator == this.decimalSeparator) {
+ return this;
+ }
+ return new DateTimeFormatSymbols(zeroDigit, positiveSign, negativeSign, decimalSeparator);
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Checks whether the character is a digit, based on the currently set zero character.
+ *
+ * @param ch the character to check
+ * @return the value, 0 to 9, of the character, or -1 if not a digit
+ */
+ int convertToDigit(char ch) {
+ int val = ch - zeroDigit;
+ return (val >= 0 && val <= 9) ? val : -1;
+ }
+
+ /**
+ * Converts the input numeric text to the internationalized form using the zero character.
+ *
+ * @param numericText the text, consisting of digits 0 to 9, to convert, not null
+ * @return the internationalized text, not null
+ */
+ String convertNumberToI18N(String numericText) {
+ if (zeroDigit == '0') {
+ return numericText;
+ }
+ int diff = zeroDigit - '0';
+ char[] array = numericText.toCharArray();
+ for (int i = 0; i < array.length; i++) {
+ array[i] = (char) (array[i] + diff);
+ }
+ return new String(array);
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Checks if these symbols equal another set of symbols.
+ *
+ * @param obj the object to check, null returns false
+ * @return true if this is equal to the other date
+ */
+ @Override
+ public boolean equals(Object obj) {
+ if (this == obj) {
+ return true;
+ }
+ if (obj instanceof DateTimeFormatSymbols) {
+ DateTimeFormatSymbols other = (DateTimeFormatSymbols) obj;
+ return (zeroDigit == other.zeroDigit && positiveSign == other.positiveSign &&
+ negativeSign == other.negativeSign && decimalSeparator == other.decimalSeparator);
+ }
+ return false;
+ }
+
+ /**
+ * A hash code for these symbols.
+ *
+ * @return a suitable hash code
+ */
+ @Override
+ public int hashCode() {
+ return zeroDigit + positiveSign + negativeSign + decimalSeparator;
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Returns a string describing these symbols.
+ *
+ * @return a string description, not null
+ */
+ @Override
+ public String toString() {
+ return "Symbols[" + zeroDigit + positiveSign + negativeSign + decimalSeparator + "]";
+ }
+
+}