Java NumberFormat.format方法代码示例

import com.ibm.icu.text.NumberFormat; //导入方法依赖的package包/类
/**
 * Normalize double value to avoid error precision.
 * 
 * @param value
 * @return normalized value of specified double.
 */
public static Number normalizeDouble( Double value )
{
	if ( value.isNaN( ) )
	{
		return 0;
	}
	
	NumberFormat df = createDefaultNumberFormat( value, ULocale.ENGLISH );

	// Normalize double value to avoid double precision error.
	String sValue = df.format( value );
	try
	{
		return df.parse( sValue );
	}
	catch ( ParseException e )
	{
		logger.log( e );
	}
	
	return value;
}
 

import com.ibm.icu.text.NumberFormat; //导入方法依赖的package包/类
/**
 * Returns the default percent symbol position for given locale
 * 
 * @param locale
 * @return
 */
public static String getDefaultSymbolPosition( ULocale locale )
{
	if ( locale == null )
	{
		locale = ULocale.getDefault( );
	}

	NumberFormat formater = NumberFormat.getPercentInstance( locale );
	String result = formater.format( 1 );
	if ( result.endsWith( "%" ) ) //$NON-NLS-1$
	{
		return FormatNumberPattern.SYMBOL_POSITION_AFTER;
	}
	else
	{
		return FormatNumberPattern.SYMBOL_POSITION_BEFORE;
	}
}
 

import com.ibm.icu.text.NumberFormat; //导入方法依赖的package包/类
@SuppressWarnings("deprecation")
com.ibm.icu.text.PluralRules.FixedDecimal toFixedDecimal(double n) {
    NumberFormat nf = getNumberFormat();

    StringBuffer sb = new StringBuffer();
    FieldPosition fp = new FieldPosition(DecimalFormat.FRACTION_FIELD);
    nf.format(n, sb, fp);

    int v = fp.getEndIndex() - fp.getBeginIndex();
    long f = 0;
    if (v > 0) {
        ParsePosition pp = new ParsePosition(fp.getBeginIndex());
        f = nf.parse(sb.toString(), pp).longValue();
    }
    return new com.ibm.icu.text.PluralRules.FixedDecimal(n, v, f);
}
 

import com.ibm.icu.text.NumberFormat; //导入方法依赖的package包/类
/**
 * Returns the default currency symbol position for given locale. Returns
 * <code>null</code> if no symbol needed by default.
 * 
 * @param locale
 * @return
 */
public static String getDefaultSymbolPosition( ULocale locale )
{
	if ( locale == null )
	{
		locale = ULocale.getDefault( );
	}

	Currency currency = Currency.getInstance( locale );
	if ( currency != null )
	{
		String symbol = currency.getSymbol( );
		if ( symbol == null )
		{
			return null;
		}
		NumberFormat formater = NumberFormat.getCurrencyInstance( locale );
		String result = formater.format( 1 );
		if ( result.endsWith( symbol ) )
		{
			return FormatNumberPattern.SYMBOL_POSITION_AFTER;
		}
		else
		{
			return FormatNumberPattern.SYMBOL_POSITION_BEFORE;
		}
	}
	return null;
}
 

import com.ibm.icu.text.NumberFormat; //导入方法依赖的package包/类
/**
 * Returns the if symbol space is used by default for given locale.
 * 
 * @param locale
 * @return
 */
public static boolean getDefaultUsingSymbolSpace( ULocale locale )
{
	if ( locale == null )
	{
		locale = ULocale.getDefault( );
	}

	Currency currency = Currency.getInstance( locale );
	if ( currency != null )
	{
		String symbol = currency.getSymbol( );
		if ( symbol == null )
		{
			return false;
		}
		NumberFormat formater = NumberFormat.getCurrencyInstance( locale );
		String result = formater.format( 1 );
		if ( result.endsWith( symbol ) )
		{
			result = result.substring( 0, result.indexOf( symbol ) );

			for ( int i = result.length( ) - 1; i >= 0; i-- )
			{
				if ( UCharacter.isSpaceChar( result.codePointAt( i ) ) )
				{
					return true;
				}
			}
		}
		else
		{
			result = result.substring( result.indexOf( symbol )
					+ symbol.length( ) );

			for ( int i = 0; i < result.length( ); i++ )
			{
				if ( UCharacter.isSpaceChar( result.codePointAt( i ) ) )
				{
					return true;
				}
			}
		}
	}
	return false;
}
 

import com.ibm.icu.text.NumberFormat; //导入方法依赖的package包/类
public String formatNumber(final Number n, final LotusNumberOptions lno) {
	NumberFormat nf;
	/*
	 * It would have been more convenient to use NumberFormat.getInstance(locale, style),
	 * but this method is private in com.ibm.icu_3.8.1.v20120530.jar.
	 * (Seems to be public as of ICU 4.2.)
	 */
	if (lno.format == 'C')
		nf = NumberFormat.getCurrencyInstance(iLocale);
	else if (lno.format == 'S')
		nf = NumberFormat.getScientificInstance(iLocale);
	else if (lno.format == '%')
		nf = NumberFormat.getPercentInstance(iLocale);
	else
		nf = NumberFormat.getNumberInstance(iLocale);
	nf.setGroupingUsed(lno.useGrouping);
	nf.setMaximumIntegerDigits(1000);
	if (lno.fractionDigits != -1) {
		nf.setMinimumFractionDigits(lno.fractionDigits);
		nf.setMaximumFractionDigits(lno.fractionDigits);
	} else
		nf.setMaximumFractionDigits(1000);
	String ret = nf.format(n);
	do {
		if (lno.format != 'G' || ret.length() <= 15)
			break;
		/*
		 * In this case, Lotus implicitly switches to scientific style.
		 * When useGrouping is in effect, the limit decreases from 15 to 12 in Lotus
		 * (i.e. the grouping bytes are likewise counted), but we are not going to
		 *  imitate this strange behaviour.
		 */
		String tester = ret;
		if (lno.useGrouping) {
			nf.setGroupingUsed(false);
			tester = nf.format(n);
		}
		int minus = (tester.charAt(0) == '-') ? 1 : 0;
		int lh = tester.length();
		if (lh - minus <= 15)
			break;
		int komma = minus;
		for (; komma < lh; komma++)
			if (!Character.isDigit(tester.charAt(komma)))
				break;
		if (komma - minus <= 15)
			break;
		nf = NumberFormat.getScientificInstance(iLocale);
		nf.setGroupingUsed(lno.useGrouping);
		ret = nf.format(n);
	} while (false);
	if (lno.negativeAsParentheses && ret.charAt(0) == '-')
		ret = '(' + ret.substring(1) + ')';
	return ret;
}
 

import com.ibm.icu.text.NumberFormat; //导入方法依赖的package包/类
/**
 * Use default number format pattern to format number value. If value < 1
 * then at most remains 3 significant figures but the total decimal digits
 * can't exceed 9, else use default format instance of system to format
 * number.
 * 
 * @param value
 * @param locale
 * @return
 */
private static final String formatNumber( Number value, ULocale locale )
{
	NumberFormat format = createDefaultNumberFormat( value, locale );
	return format.format(  value  );
}