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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
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tree976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/java/text/NumberFormat.java
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+/* NumberFormat.java -- Formats and parses numbers
+ Copyright (C) 1998, 1999, 2000, 2001, 2003, 2004, 2007
+ Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package java.text;
+
+import gnu.java.locale.LocaleHelper;
+
+import java.io.IOException;
+import java.io.InvalidObjectException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+
+import java.text.spi.NumberFormatProvider;
+
+import java.util.Currency;
+import java.util.Locale;
+import java.util.MissingResourceException;
+import java.util.ResourceBundle;
+import java.util.ServiceLoader;
+
+/**
+ * This is the abstract superclass of all classes which format and
+ * parse numeric values such as decimal numbers, integers, currency values,
+ * and percentages. These classes perform their parsing and formatting
+ * in a locale specific manner, accounting for such items as differing
+ * currency symbols and thousands separators.
+ * <p>
+ * To create an instance of a concrete subclass of <code>NumberFormat</code>,
+ * do not call a class constructor directly. Instead, use one of the
+ * static factory methods in this class such as
+ * <code>getCurrencyInstance</code>.
+ *
+ * @author Tom Tromey (tromey@cygnus.com)
+ * @author Aaron M. Renn (arenn@urbanophile.com)
+ * @date March 4, 1999
+ */
+/* Written using "Java Class Libraries", 2nd edition, plus online
+ * API docs for JDK 1.2 from http://www.javasoft.com.
+ * Status: Believed complete and correct to 1.2, except getAvailableLocales.
+ */
+public abstract class NumberFormat extends Format implements Cloneable
+{
+ /**
+ * This is a constant used to create a <code>FieldPosition</code> object
+ * that will return the integer portion of a formatted number.
+ */
+ public static final int INTEGER_FIELD = 0;
+
+ /**
+ * This is a constant used to create a <code>FieldPosition</code> object
+ * that will return the fractional portion of a formatted number.
+ */
+ public static final int FRACTION_FIELD = 1;
+
+ public static class Field extends Format.Field
+ {
+ static final long serialVersionUID = 7494728892700160890L;
+
+ /**
+ * Attribute set to all characters containing digits of the integer
+ * part.
+ */
+ public static final NumberFormat.Field INTEGER
+ = new Field("integer");
+
+ /**
+ * Attribute set to all characters containing digits of the fractional
+ * part.
+ */
+ public static final NumberFormat.Field FRACTION
+ = new Field("fraction");
+
+ /**
+ * Attribute set to all characters containing digits of the exponential
+ * part.
+ */
+ public static final NumberFormat.Field EXPONENT
+ = new Field("exponent");
+
+ /**
+ * Attribute set to all characters containing a decimal separator.
+ */
+ public static final NumberFormat.Field DECIMAL_SEPARATOR
+ = new Field("decimal separator");
+
+ /**
+ * Attribute set to all characters containing a sign (plus or minus).
+ */
+ public static final NumberFormat.Field SIGN
+ = new Field("sign");
+
+ /**
+ * Attribute set to all characters containing a grouping separator (e.g.
+ * a comma, a white space,...).
+ */
+ public static final NumberFormat.Field GROUPING_SEPARATOR
+ = new Field("grouping separator");
+
+ /**
+ * Attribute set to all characters containing an exponential symbol (e.g.
+ * 'E')
+ */
+ public static final NumberFormat.Field EXPONENT_SYMBOL
+ = new Field("exponent symbol");
+
+ /**
+ * Attribute set to all characters containing a percent symbol (e.g. '%')
+ */
+ public static final NumberFormat.Field PERCENT
+ = new Field("percent");
+
+ /**
+ * Attribute set to all characters containing a permille symbol.
+ */
+ public static final NumberFormat.Field PERMILLE
+ = new Field("permille");
+
+ /**
+ * Attribute set to all characters containing the currency unit.
+ */
+ public static final NumberFormat.Field CURRENCY
+ = new Field("currency");
+
+ /**
+ * Attribute set to all characters containing the exponent sign.
+ */
+ public static final NumberFormat.Field EXPONENT_SIGN
+ = new Field("exponent sign");
+
+ /**
+ * Private fields to register all fields contained in this descriptor.
+ */
+ private static final NumberFormat.Field[] allFields =
+ {
+ INTEGER, FRACTION, EXPONENT, DECIMAL_SEPARATOR, SIGN,
+ GROUPING_SEPARATOR, EXPONENT_SYMBOL, PERCENT,
+ PERMILLE, CURRENCY, EXPONENT_SIGN
+ };
+
+ /**
+ * This constructor is only used by the deserializer. Without it,
+ * it would fail to construct a valid object.
+ */
+ @SuppressWarnings("unused")
+ private Field()
+ {
+ super("");
+ }
+
+ /**
+ * Create a Field instance with the specified field name.
+ *
+ * @param field_name Field name for the new Field instance.
+ */
+ protected Field(String field_name)
+ {
+ super (field_name);
+ }
+
+ /**
+ * This function is used by the deserializer to know which object
+ * to use when it encounters an encoded NumberFormat.Field in a
+ * serialization stream. If the stream is valid it should return
+ * one of the above field. In the other case we throw an exception.
+ *
+ * @return a valid official NumberFormat.Field instance.
+ *
+ * @throws InvalidObjectException if the field name is invalid.
+ */
+ protected Object readResolve() throws InvalidObjectException
+ {
+ String s = getName();
+ for (int i = 0; i < allFields.length; i++)
+ if (s.equals(allFields[i].getName()))
+ return allFields[i];
+
+ throw new InvalidObjectException("no such NumberFormat field called "
+ + s);
+ }
+ }
+
+ /**
+ * This method is a specialization of the format method that performs
+ * a simple formatting of the specified <code>long</code> number.
+ *
+ * @param number The <code>long</code> to format.
+ *
+ * @return The formatted number
+ */
+ public final String format (long number)
+ {
+ StringBuffer sbuf = new StringBuffer(50);
+ format (number, sbuf, new FieldPosition(0));
+ return sbuf.toString();
+ }
+
+ /**
+ * @specnote this method was final in releases before 1.5
+ */
+ public StringBuffer format (Object obj, StringBuffer sbuf,
+ FieldPosition pos)
+ {
+ if (obj instanceof Number)
+ return format(((Number) obj).doubleValue(), sbuf, pos);
+
+ throw new
+ IllegalArgumentException("Cannot format given Object as a Number");
+ }
+
+ /**
+ * This method formats the specified <code>double</code> and appends it to
+ * a <code>StringBuffer</code>.
+ *
+ * @param number The <code>double</code> to format.
+ * @param sbuf The <code>StringBuffer</code> to append the formatted number
+ * to.
+ * @param pos The desired <code>FieldPosition</code>.
+ *
+ * @return The <code>StringBuffer</code> with the appended number.
+ */
+ public abstract StringBuffer format (double number,
+ StringBuffer sbuf, FieldPosition pos);
+
+ /**
+ * This method formats the specified <code>long</code> and appends it to
+ * a <code>StringBuffer</code>.
+ *
+ * @param number The <code>long</code> to format.
+ * @param sbuf The <code>StringBuffer</code> to append the formatted number
+ * to.
+ * @param pos The desired <code>FieldPosition</code>.
+ *
+ * @return The <code>StringBuffer</code> with the appended number.
+ */
+ public abstract StringBuffer format (long number,
+ StringBuffer sbuf, FieldPosition pos);
+
+ /**
+ * This method tests the specified object for equality against this object.
+ * This will be <code>true</code> if the following conditions are met:
+ * <p>
+ * <ul>
+ * <li>The specified object is not <code>null</code>.
+ * <li>The specified object is an instance of <code>NumberFormat</code>.
+ * </ul>
+ * <p>
+ * Since this method does not test much, it is highly advised that
+ * concrete subclasses override this method.
+ *
+ * @param obj The <code>Object</code> to test against equality with
+ * this object.
+ *
+ * @return <code>true</code> if the specified object is equal to
+ * this object, <code>false</code> otherwise.
+ */
+ public boolean equals (Object obj)
+ {
+ if (! (obj instanceof NumberFormat))
+ return false;
+ NumberFormat nf = (NumberFormat) obj;
+ return (groupingUsed == nf.groupingUsed
+ && maximumFractionDigits == nf.maximumFractionDigits
+ && maximumIntegerDigits == nf.maximumIntegerDigits
+ && minimumFractionDigits == nf.minimumFractionDigits
+ && minimumIntegerDigits == nf.minimumIntegerDigits
+ && parseIntegerOnly == nf.parseIntegerOnly);
+ }
+
+ /**
+ * This method returns a list of locales for which concrete instances
+ * of <code>NumberFormat</code> subclasses may be created.
+ *
+ * @return The list of available locales.
+ */
+ public static Locale[] getAvailableLocales ()
+ {
+ Locale[] list = new Locale[1];
+ list[0] = Locale.US;
+ return list;
+ }
+
+ private static NumberFormat computeInstance(Locale loc, String resource,
+ String def)
+ throws MissingResourceException
+ {
+ if (loc.equals(Locale.ROOT))
+ return new DecimalFormat(def, DecimalFormatSymbols.getInstance(loc));
+ ResourceBundle res =
+ ResourceBundle.getBundle("gnu.java.locale.LocaleInformation",
+ loc, ClassLoader.getSystemClassLoader());
+ String fmt;
+ try
+ {
+ fmt = res == null ? def : res.getString(resource);
+ }
+ catch (MissingResourceException x)
+ {
+ fmt = def;
+ }
+ DecimalFormatSymbols dfs = DecimalFormatSymbols.getInstance(loc);
+ return new DecimalFormat (fmt, dfs);
+ }
+
+ /**
+ * This method returns an instance of <code>NumberFormat</code> suitable
+ * for formatting and parsing currency values in the default locale.
+ *
+ * @return An instance of <code>NumberFormat</code> for handling currencies.
+ */
+ public static final NumberFormat getCurrencyInstance ()
+ {
+ return getCurrencyInstance (Locale.getDefault());
+ }
+
+ /**
+ * This method returns an instance of <code>NumberFormat</code> suitable
+ * for formatting and parsing currency values in the specified locale.
+ *
+ * @return An instance of <code>NumberFormat</code> for handling currencies.
+ */
+ public static NumberFormat getCurrencyInstance (Locale loc)
+ {
+ try
+ {
+ NumberFormat format;
+
+ format = computeInstance (loc, "currencyFormat",
+ "\u00A4#,##0.00;(\u00A4#,##0.00)");
+ format.setMaximumFractionDigits(format.getCurrency().getDefaultFractionDigits());
+ return format;
+ }
+ catch (MissingResourceException e)
+ {
+ for (NumberFormatProvider p :
+ ServiceLoader.load(NumberFormatProvider.class))
+ {
+ for (Locale l : p.getAvailableLocales())
+ {
+ if (l.equals(loc))
+ {
+ NumberFormat nf = p.getCurrencyInstance(loc);
+ if (nf != null)
+ return nf;
+ break;
+ }
+ }
+ }
+ return getCurrencyInstance(LocaleHelper.getFallbackLocale(loc));
+ }
+ }
+
+ /**
+ * This method returns a default instance for the default locale. This
+ * will be a concrete subclass of <code>NumberFormat</code>, but the
+ * actual class returned is dependent on the locale.
+ *
+ * @return An instance of the default <code>NumberFormat</code> class.
+ */
+ public static final NumberFormat getInstance ()
+ {
+ return getInstance (Locale.getDefault());
+ }
+
+ /**
+ * This method returns a default instance for the specified locale. This
+ * will be a concrete subclass of <code>NumberFormat</code>, but the
+ * actual class returned is dependent on the locale.
+ *
+ * @param loc The desired locale.
+ *
+ * @return An instance of the default <code>NumberFormat</code> class.
+ */
+ public static NumberFormat getInstance (Locale loc)
+ {
+ // For now always return a number instance.
+ return getNumberInstance (loc);
+ }
+
+ /**
+ * This method returns the maximum number of digits allowed in the fraction
+ * portion of a number.
+ *
+ * @return The maximum number of digits allowed in the fraction
+ * portion of a number.
+ */
+ public int getMaximumFractionDigits ()
+ {
+ return maximumFractionDigits;
+ }
+
+ /**
+ * This method returns the maximum number of digits allowed in the integer
+ * portion of a number.
+ *
+ * @return The maximum number of digits allowed in the integer
+ * portion of a number.
+ */
+ public int getMaximumIntegerDigits ()
+ {
+ return maximumIntegerDigits;
+ }
+
+ /**
+ * This method returns the minimum number of digits allowed in the fraction
+ * portion of a number.
+ *
+ * @return The minimum number of digits allowed in the fraction
+ * portion of a number.
+ */
+ public int getMinimumFractionDigits ()
+ {
+ return minimumFractionDigits;
+ }
+
+ /**
+ * This method returns the minimum number of digits allowed in the integer
+ * portion of a number.
+ *
+ * @return The minimum number of digits allowed in the integer
+ * portion of a number.
+ */
+ public int getMinimumIntegerDigits ()
+ {
+ return minimumIntegerDigits;
+ }
+
+ /**
+ * This method returns a default instance for the specified locale. This
+ * will be a concrete subclass of <code>NumberFormat</code>, but the
+ * actual class returned is dependent on the locale.
+ *
+ * @return An instance of the default <code>NumberFormat</code> class.
+ */
+ public static final NumberFormat getNumberInstance ()
+ {
+ return getNumberInstance (Locale.getDefault());
+ }
+
+ /**
+ * This method returns a general purpose number formatting and parsing
+ * class for the default locale. This will be a concrete subclass of
+ * <code>NumberFormat</code>, but the actual class returned is dependent
+ * on the locale.
+ *
+ * @return An instance of a generic number formatter for the default locale.
+ */
+ public static NumberFormat getNumberInstance (Locale loc)
+ {
+ try
+ {
+ return computeInstance (loc, "numberFormat", "#,##0.###");
+ }
+ catch (MissingResourceException e)
+ {
+ for (NumberFormatProvider p :
+ ServiceLoader.load(NumberFormatProvider.class))
+ {
+ for (Locale l : p.getAvailableLocales())
+ {
+ if (l.equals(loc))
+ {
+ NumberFormat nf = p.getNumberInstance(loc);
+ if (nf != null)
+ return nf;
+ break;
+ }
+ }
+ }
+ return getNumberInstance(LocaleHelper.getFallbackLocale(loc));
+ }
+ }
+
+ /**
+ * This method returns an integer formatting and parsing class for the
+ * default locale. This will be a concrete subclass of <code>NumberFormat</code>,
+ * but the actual class returned is dependent on the locale.
+ *
+ * @return An instance of an integer number formatter for the default locale.
+ * @since 1.4
+ */
+ public static final NumberFormat getIntegerInstance()
+ {
+ return getIntegerInstance (Locale.getDefault());
+ }
+
+ /**
+ * This method returns an integer formatting and parsing class for the
+ * default locale. This will be a concrete subclass of <code>NumberFormat</code>,
+ * but the actual class returned is dependent on the locale.
+ *
+ * @param locale the desired locale.
+ *
+ * @return An instance of an integer number formatter for the desired locale.
+ * @since 1.4
+ */
+ public static NumberFormat getIntegerInstance(Locale locale)
+ {
+ try
+ {
+ NumberFormat format = computeInstance (locale,
+ "integerFormat", "#,##0");
+ format.setMaximumFractionDigits(0);
+ format.setParseIntegerOnly (true);
+ return format;
+ }
+ catch (MissingResourceException e)
+ {
+ for (NumberFormatProvider p :
+ ServiceLoader.load(NumberFormatProvider.class))
+ {
+ for (Locale l : p.getAvailableLocales())
+ {
+ if (l.equals(locale))
+ {
+ NumberFormat nf = p.getIntegerInstance(locale);
+ if (nf != null)
+ return nf;
+ break;
+ }
+ }
+ }
+ return getIntegerInstance(LocaleHelper.getFallbackLocale(locale));
+ }
+ }
+
+ /**
+ * This method returns an instance of <code>NumberFormat</code> suitable
+ * for formatting and parsing percentage values in the default locale.
+ *
+ * @return An instance of <code>NumberFormat</code> for handling percentages.
+ */
+ public static final NumberFormat getPercentInstance ()
+ {
+ return getPercentInstance (Locale.getDefault());
+ }
+
+ /**
+ * This method returns an instance of <code>NumberFormat</code> suitable
+ * for formatting and parsing percentage values in the specified locale.
+ *
+ * @param loc The desired locale.
+ *
+ * @return An instance of <code>NumberFormat</code> for handling percentages.
+ */
+ public static NumberFormat getPercentInstance (Locale loc)
+ {
+ try
+ {
+ return computeInstance (loc, "percentFormat", "#,##0%");
+ }
+ catch (MissingResourceException e)
+ {
+ for (NumberFormatProvider p :
+ ServiceLoader.load(NumberFormatProvider.class))
+ {
+ for (Locale l : p.getAvailableLocales())
+ {
+ if (l.equals(loc))
+ {
+ NumberFormat nf = p.getPercentInstance(loc);
+ if (nf != null)
+ return nf;
+ break;
+ }
+ }
+ }
+ return getPercentInstance(LocaleHelper.getFallbackLocale(loc));
+ }
+ }
+
+ /**
+ * This method returns a hash value for this object.
+ *
+ * @return The hash code.
+ */
+ public int hashCode ()
+ {
+ int hash = super.hashCode();
+ hash ^= (maximumFractionDigits + maximumIntegerDigits
+ + minimumFractionDigits + minimumIntegerDigits);
+ if (groupingUsed)
+ hash ^= 0xf0f0;
+ if (parseIntegerOnly)
+ hash ^= 0x0f0f;
+ return hash;
+ }
+
+ /**
+ * This method tests whether or not grouping is in use. Grouping is
+ * a method of marking separations in numbers, such as thousand separators
+ * in the US English locale. The grouping positions and symbols are all
+ * locale specific. As an example, with grouping disabled, the number one
+ * million would appear as "1000000". With grouping enabled, this number
+ * might appear as "1,000,000". (Both of these assume the US English
+ * locale).
+ *
+ * @return <code>true</code> if grouping is enabled,
+ * <code>false</code> otherwise.
+ */
+ public boolean isGroupingUsed ()
+ {
+ return groupingUsed;
+ }
+
+ /**
+ * This method tests whether or not only integer values should be parsed.
+ * If this class is parsing only integers, parsing stops at the decimal
+ * point.
+ *
+ * @return <code>true</code> if only integers are parsed,
+ * <code>false</code> otherwise.
+ */
+ public boolean isParseIntegerOnly ()
+ {
+ return parseIntegerOnly;
+ }
+
+ /**
+ * This is a default constructor for use by subclasses.
+ */
+ protected NumberFormat ()
+ {
+ }
+
+ /**
+ * This method parses the specified string into a <code>Number</code>. This
+ * will be a <code>Long</code> if possible, otherwise it will be a
+ * <code>Double</code>. If no number can be parsed, no exception is
+ * thrown. Instead, the parse position remains at its initial index.
+ *
+ * @param sourceStr The string to parse.
+ * @param pos The desired <code>ParsePosition</code>.
+ *
+ * @return The parsed <code>Number</code>
+ */
+ public abstract Number parse (String sourceStr, ParsePosition pos);
+
+ /**
+ * This method parses the specified string into a <code>Number</code>. This
+ * will be a <code>Long</code> if possible, otherwise it will be a
+ * <code>Double</code>. If no number can be parsed, an exception will be
+ * thrown.
+ *
+ * @param sourceStr The string to parse.
+ *
+ * @return The parsed <code>Number</code>
+ *
+ * @exception ParseException If no number can be parsed.
+ */
+ public Number parse (String sourceStr) throws ParseException
+ {
+ ParsePosition pp = new ParsePosition (0);
+ Number r = parse (sourceStr, pp);
+ if (r == null)
+ {
+ int index = pp.getErrorIndex();
+ if (index < 0)
+ index = pp.getIndex();
+ throw new ParseException ("couldn't parse number", index);
+ }
+ return r;
+ }
+
+ /**
+ * This method parses the specified string into an <code>Object</code>. This
+ * will be a <code>Long</code> if possible, otherwise it will be a
+ * <code>Double</code>. If no number can be parsed, no exception is
+ * thrown. Instead, the parse position remains at its initial index.
+ *
+ * @param sourceStr The string to parse.
+ * @param pos The desired <code>ParsePosition</code>.
+ *
+ * @return The parsed <code>Object</code>
+ */
+ public final Object parseObject (String sourceStr, ParsePosition pos)
+ {
+ return parse (sourceStr, pos);
+ }
+
+ /**
+ * This method sets the grouping behavior of this formatter. Grouping is
+ * a method of marking separations in numbers, such as thousand separators
+ * in the US English locale. The grouping positions and symbols are all
+ * locale specific. As an example, with grouping disabled, the number one
+ * million would appear as "1000000". With grouping enabled, this number
+ * might appear as "1,000,000". (Both of these assume the US English
+ * locale).
+ *
+ * @param newValue <code>true</code> to enable grouping,
+ * <code>false</code> to disable it.
+ */
+ public void setGroupingUsed (boolean newValue)
+ {
+ groupingUsed = newValue;
+ }
+
+ /**
+ * This method sets the maximum number of digits allowed in the fraction
+ * portion of a number to the specified value. If this is less than the
+ * current minimum allowed digits, the minimum allowed digits value will
+ * be lowered to be equal to the new maximum allowed digits value.
+ *
+ * @param digits The new maximum fraction digits value.
+ */
+ public void setMaximumFractionDigits (int digits)
+ {
+ maximumFractionDigits = digits;
+ if (getMinimumFractionDigits () > maximumFractionDigits)
+ setMinimumFractionDigits (maximumFractionDigits);
+ }
+
+ /**
+ * This method sets the maximum number of digits allowed in the integer
+ * portion of a number to the specified value. If this is less than the
+ * current minimum allowed digits, the minimum allowed digits value will
+ * be lowered to be equal to the new maximum allowed digits value.
+ *
+ * @param digits The new maximum integer digits value.
+ */
+ public void setMaximumIntegerDigits (int digits)
+ {
+ maximumIntegerDigits = digits;
+ if (getMinimumIntegerDigits () > maximumIntegerDigits)
+ setMinimumIntegerDigits (maximumIntegerDigits);
+ }
+
+ /**
+ * This method sets the minimum number of digits allowed in the fraction
+ * portion of a number to the specified value. If this is greater than the
+ * current maximum allowed digits, the maximum allowed digits value will
+ * be raised to be equal to the new minimum allowed digits value.
+ *
+ * @param digits The new minimum fraction digits value.
+ */
+ public void setMinimumFractionDigits (int digits)
+ {
+ minimumFractionDigits = digits;
+ if (getMaximumFractionDigits () < minimumFractionDigits)
+ setMaximumFractionDigits (minimumFractionDigits);
+ }
+
+ /**
+ * This method sets the minimum number of digits allowed in the integer
+ * portion of a number to the specified value. If this is greater than the
+ * current maximum allowed digits, the maximum allowed digits value will
+ * be raised to be equal to the new minimum allowed digits value.
+ *
+ * @param digits The new minimum integer digits value.
+ */
+ public void setMinimumIntegerDigits (int digits)
+ {
+ minimumIntegerDigits = digits;
+ if (getMaximumIntegerDigits () < minimumIntegerDigits)
+ setMaximumIntegerDigits (minimumIntegerDigits);
+ }
+
+ /**
+ * This method sets the parsing behavior of this object to parse only
+ * integers or not.
+ *
+ * @param value <code>true</code> to parse only integers,
+ * <code>false</code> otherwise.
+ */
+ public void setParseIntegerOnly (boolean value)
+ {
+ parseIntegerOnly = value;
+ }
+
+ /**
+ * This method is a specialization of the format method that performs
+ * a simple formatting of the specified <code>double</code> number.
+ *
+ * @param number The <code>double</code> to format.
+ *
+ * @return The formatted number
+ */
+ public final String format (double number)
+ {
+ StringBuffer sbuf = new StringBuffer(50);
+ FieldPosition position = new FieldPosition(0);
+
+ format (number, sbuf, position);
+ return sbuf.toString();
+ }
+
+ // These field names are fixed by the serialization spec.
+ boolean groupingUsed;
+ int maximumFractionDigits;
+ private byte maxFractionDigits;
+ int maximumIntegerDigits;
+ private byte maxIntegerDigits;
+ int minimumFractionDigits;
+ private byte minFractionDigits;
+ int minimumIntegerDigits;
+ private byte minIntegerDigits;
+ boolean parseIntegerOnly;
+ private int serialVersionOnStream;
+ private static final long serialVersionUID = -2308460125733713944L;
+
+ private void readObject(ObjectInputStream stream)
+ throws IOException, ClassNotFoundException
+ {
+ stream.defaultReadObject();
+ if (serialVersionOnStream < 1)
+ {
+ maximumFractionDigits = maxFractionDigits;
+ maximumIntegerDigits = maxIntegerDigits;
+ minimumFractionDigits = minFractionDigits;
+ minimumIntegerDigits = minIntegerDigits;
+ serialVersionOnStream = 1;
+ }
+ }
+
+ private void writeObject(ObjectOutputStream stream) throws IOException
+ {
+ maxFractionDigits = maximumFractionDigits < Byte.MAX_VALUE ?
+ (byte) maximumFractionDigits : Byte.MAX_VALUE;
+ maxIntegerDigits = maximumIntegerDigits < Byte.MAX_VALUE ?
+ (byte) maximumIntegerDigits : Byte.MAX_VALUE;
+ minFractionDigits = minimumFractionDigits < Byte.MAX_VALUE ?
+ (byte) minimumFractionDigits : Byte.MAX_VALUE;
+ minIntegerDigits = minimumIntegerDigits < Byte.MAX_VALUE ?
+ (byte) minimumIntegerDigits : Byte.MAX_VALUE;
+ serialVersionOnStream = 1;
+ stream.defaultWriteObject();
+ }
+
+ /**
+ * Returns the currency used by this number format when formatting currency
+ * values.
+ *
+ * The default implementation throws UnsupportedOperationException.
+ *
+ * @return The used currency object, or null.
+ *
+ * @throws UnsupportedOperationException If the number format class doesn't
+ * implement currency formatting.
+ *
+ * @since 1.4
+ */
+ public Currency getCurrency()
+ {
+ throw new UnsupportedOperationException();
+ }
+
+ /**
+ * Sets the currency used by this number format when formatting currency
+ * values.
+ *
+ * The default implementation throws UnsupportedOperationException.
+ *
+ * @param currency The new currency to be used by this number format.
+ *
+ * @throws NullPointerException If currenc is null.
+ * @throws UnsupportedOperationException If the number format class doesn't
+ * implement currency formatting.
+ *
+ * @since 1.4
+ */
+ public void setCurrency(Currency currency)
+ {
+ if (currency == null)
+ throw new NullPointerException("currency may not be null");
+
+ throw new UnsupportedOperationException();
+ }
+}