Java DecimalFormat.getInstance方法代码示例

import java.text.DecimalFormat; //导入方法依赖的package包/类
private void build() {
    try {

        if (typeQualifier != null) {
            buildQualifiedNumber();
            return;
        }

        Number value;
        if (number.contains(".")) {
            DecimalFormat decimalFormat = (DecimalFormat) DecimalFormat.getInstance(Locale.US);
            decimalFormat.setParseBigDecimal(true);

            int decSymbolIndex = number.lastIndexOf(".");
            if (decSymbolIndex > -1) {
                int precision = number.substring(decSymbolIndex, number.length() - 1).length();
                decimalFormat.setMaximumFractionDigits(precision);
            }

            value = decimalFormat.parse(number);
        } else {
            value = NumberFormat.getInstance(locale).parse(number);
        }

        set(value);
    } catch (ParseException e) {
        throw new RuntimeException(String.format("Invalid number '%s'", number));
    }
}
 

import java.text.DecimalFormat; //导入方法依赖的package包/类
private String getDecoratedStringFromNumber(long number)
{
    String numberPattern = "#,###,###,###";
    String decoStr = "";

    DecimalFormat formatter = (DecimalFormat) DecimalFormat.getInstance(Locale.getDefault());
    if (_showCommas && !_showCurrency)
        formatter.applyPattern(numberPattern);
    else if (_showCommas && _showCurrency)
        formatter.applyPattern(_currencySymbol + " " + numberPattern);
    else if (!_showCommas && _showCurrency)
        formatter.applyPattern(_currencySymbol + " ");
    else if (!_showCommas && !_showCurrency)
    {
        decoStr = number + "";
        return decoStr;
    }

    decoStr = formatter.format(number);

    return decoStr;
}
 

import java.text.DecimalFormat; //导入方法依赖的package包/类
@Override
public String valStr() {
    int pl = args.get(1).valInt().intValue();
    if (pl < 0)
        pl = 0;
    String local = "en_US";
    if (args.size() == 3)
        local = args.get(2).valStr();
    Locale loc = new Locale(local);
    NumberFormat f = DecimalFormat.getInstance(loc);
    if (args.get(0).isNull() || args.get(1).isNull()) {
        this.nullValue = true;
        return EMPTY;
    }
    BigDecimal bd = args.get(0).valDecimal();
    BigDecimal bdnew = bd.setScale(pl, RoundingMode.HALF_UP);
    return f.format(bdnew);
}
 

import java.text.DecimalFormat; //导入方法依赖的package包/类
/**
 * Convert the specified locale-sensitive input object into an output
 * object of the specified type.
 *
 * @param value The input object to be converted
 * @param pattern The pattern is used for the convertion
 * @return The converted value
 *
 * @throws org.apache.commons.beanutils.ConversionException if conversion
 * cannot be performed successfully
 * @throws ParseException if an error occurs parsing a String to a Number
 */
@Override
protected Object parse(final Object value, final String pattern) throws ParseException {

    if (value instanceof Number) {
        return value;
    }

    // Note that despite the ambiguous "getInstance" name, and despite the
    // fact that objects returned from this method have the same toString
    // representation, each call to getInstance actually returns a new
    // object.
    final DecimalFormat formatter = (DecimalFormat) DecimalFormat.getInstance(locale);

    // if some constructors default pattern to null, it makes only sense
    // to handle null pattern gracefully
    if (pattern != null) {
        if (locPattern) {
            formatter.applyLocalizedPattern(pattern);
        } else {
            formatter.applyPattern(pattern);
        }
    } else {
        log.debug("No pattern provided, using default.");
    }

    return formatter.parse((String) value);
}
 

import java.text.DecimalFormat; //导入方法依赖的package包/类
public TrackPresenterImpl(){
    mDistanceFormater = (DecimalFormat) NumberFormat.getInstance();
    mDistanceFormater.setMinimumFractionDigits(2);
    mDistanceFormater.setMaximumFractionDigits(2);
    mTimeFormater = (DecimalFormat) DecimalFormat.getInstance();
    mTimeFormater.applyPattern("00");
}
 

import java.text.DecimalFormat; //导入方法依赖的package包/类
private void assertThatMaxEntitiesExceeded(SAXParseException exception) {
    DecimalFormat df = (DecimalFormat) DecimalFormat.getInstance();
    df.applyPattern("##,###");
    // Java7u21 and before
    String maxEntitiesExceededMessage_le21 = df.format(64000);
    // after Java7u21
    String maxEntitiesExceededMessage_gt21 = "64000";

    assertThat(
            exception.getMessage(),
            either(containsString(maxEntitiesExceededMessage_le21)).or(
                    containsString(maxEntitiesExceededMessage_gt21)));
}
 

import java.text.DecimalFormat; //导入方法依赖的package包/类
/**
 * Retourne sous forme d'une chaîne de caractères String le temps écoulé depuis la mise
 * à zéro du chronomètre interne.
 *
 * @return le nombre de secondes écoulés jusqu'au 1/1000s
 */
public static String chronoStringElapsedTime() {
  Locale locale = Locale.getDefault();
  DecimalFormat df = (DecimalFormat) DecimalFormat.getInstance(locale);
  df.applyPattern("#,##0.000");
  return df.format(chronoElapsedTime());
}
 

import java.text.DecimalFormat; //导入方法依赖的package包/类
/**
 * 格式化数字 double2string
 */
private CharSequence formatDecimal2String(double decimal) {
    String decimalScaleStr = "";
    String s = mDecimalFill ? "0" : "#";
    for (int i = 0; i < mDecimalScale; i++) {
        decimalScaleStr += s;
    }

    DecimalFormat formatter = (DecimalFormat) DecimalFormat.getInstance(Locale.getDefault());
    if (mShowCommas && !mShowSymbol) { // 显示数字分号 && 不显示数字符号
        formatter.applyPattern(",##0." + decimalScaleStr);
    } else if (mShowCommas) { // 显示数字分号 && 显示数字符号
        formatter.applyPattern(mSymbol + ",##0." + decimalScaleStr);
    } else if (mShowSymbol) { // 不显示数字分号 && 显示数字符号
        formatter.applyPattern(mSymbol + "#0." + decimalScaleStr);
    } else { // 不显示数字分号 && 不显示数字符号
        formatter.applyPattern("#0." + decimalScaleStr);
    }
    formatter.setRoundingMode(RoundingMode.DOWN);

    SpannableStringBuilder result = new SpannableStringBuilder(formatter.format(decimal));
    if (mShowSymbol) {
        if (mSymbolSize == 0) mSymbolSize = getTextSize();
        result.setSpan(new AbsoluteSizeSpan((int) mSymbolSize), 0, mSymbol.length(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
    }

    return result;
}
 

import java.text.DecimalFormat; //导入方法依赖的package包/类
/**
 * 格式化数字 double2string
 */
private CharSequence formatDecimal2String(double decimal) {
    String decimalScaleStr = "";
    String s = mDecimalFill ? "0" : "#";
    for (int i = 0; i < mDecimalScale; i++) {
        decimalScaleStr += s;
    }

    DecimalFormat formatter = (DecimalFormat) DecimalFormat.getInstance(Locale.getDefault());
    if (mShowCommas && !mShowSymbol) { // 显示数字分号 && 不显示数字符号
        formatter.applyPattern(",##0." + decimalScaleStr);
    } else if (mShowCommas) { // 显示数字分号 && 显示数字符号
        formatter.applyPattern(mSymbol + ",##0." + decimalScaleStr);
    } else if (mShowSymbol) { // 不显示数字分号 && 显示数字符号
        formatter.applyPattern(mSymbol + "#0." + decimalScaleStr);
    } else { // 不显示数字分号 && 不显示数字符号
        formatter.applyPattern("#0." + decimalScaleStr);
    }

    SpannableStringBuilder result = new SpannableStringBuilder(formatter.format(decimal));
    if (mShowSymbol) {
        if (mSymbolSize == 0) mSymbolSize = getTextSize();
        result.setSpan(new AbsoluteSizeSpan((int) mSymbolSize), 0, mSymbol.length(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
    }

    return result;
}
 

import java.text.DecimalFormat; //导入方法依赖的package包/类
public String formatToOneDecimalPlace(double value) {
    NumberFormat format = DecimalFormat.getInstance();
    format.setMinimumFractionDigits(1);
    format.setMaximumFractionDigits(1);
    return format.format(value);
}