java.text.NumberFormat#setMaximumFractionDigits ( )源码实例Demo

public static void main (String []args) {
	LineSweep dba1 = new LineSweep();
	BruteForceAlgorithm dba2 = new BruteForceAlgorithm();
	NumberFormat nf = NumberFormat.getInstance();
	nf.setMaximumFractionDigits(2);
	nf.setGroupingUsed(false);
	
	TrialSuite db1_suite = testSlidingLadder (dba1);
	TrialSuite db2_suite = testSlidingLadder (dba2);
	
	System.out.println("n\tAvgLS\tAvgBF");
	for (int c = 2; c <= 512; c *= 2) {
		System.out.println(c + "\t" + nf.format(Double.valueOf(db1_suite.getAverage(c))) + "\t" 
				+ nf.format(Double.valueOf(db2_suite.getAverage(c))));
	}
}
 

@Override
public String toPrintableString() {
	NumberFormat nf = NumberFormat.getInstance();

	// format for very small fractional numbers
	NumberFormat ff = NumberFormat.getInstance();
	ff.setMaximumFractionDigits(8);

	return "vertex count: " + nf.format(vertexCount)
		+ "; edge count: " + nf.format(edgeCount)
		+ "; average degree: " + nf.format(getAverageDegree())
		+ "; density: " + ff.format(getDensity())
		+ "; triplet count: " + nf.format(tripletCount)
		+ "; maximum degree: " + nf.format(maximumDegree)
		+ "; maximum triplets: " + nf.format(maximumTriplets);
}
 

public String toString() {
	NumberFormat nf=NumberFormat.getInstance(Locale.UK);
	nf.setGroupingUsed(false);
	nf.setMaximumFractionDigits(6);
	String floatsecs=nf.format(total_seconds);
	return String.format("Timedelta: %d days, %d seconds, %d microseconds (total: %s seconds)", days, seconds, microseconds, floatsecs);
}
 

/**
 * Formats the specified data size in human readable format.
 *
 * @param dataSize Data size in bytes
 * @return Human readable format
 */
public static String formatDataSize(final double dataSize) {
    // initialize the formatter
    final NumberFormat format = NumberFormat.getNumberInstance();
    format.setMaximumFractionDigits(2);

    // check terabytes
    double dataSizeToFormat = dataSize / BYTES_IN_TERABYTE;
    if (dataSizeToFormat > 1) {
        return format.format(dataSizeToFormat) + " TB";
    }

    // check gigabytes
    dataSizeToFormat = dataSize / BYTES_IN_GIGABYTE;
    if (dataSizeToFormat > 1) {
        return format.format(dataSizeToFormat) + " GB";
    }

    // check megabytes
    dataSizeToFormat = dataSize / BYTES_IN_MEGABYTE;
    if (dataSizeToFormat > 1) {
        return format.format(dataSizeToFormat) + " MB";
    }

    // check kilobytes
    dataSizeToFormat = dataSize / BYTES_IN_KILOBYTE;
    if (dataSizeToFormat > 1) {
        return format.format(dataSizeToFormat) + " KB";
    }

    // default to bytes
    return format.format(dataSize) + " bytes";
}
 

private static String convert(long amount)
{
	NumberFormat fmt = NumberFormat.getInstance();
	if (amount < 1024)
		return fmt.format(amount) + "B"; //$NON-NLS-1$

	fmt.setMaximumFractionDigits(2);
	if (amount < 1024 * 1024)
		return fmt.format(((double) amount) / 1024) + "kB"; //$NON-NLS-1$

	return fmt.format(((double) amount) / (1024 * 1024)) + "MB"; //$NON-NLS-1$
}
 

private void addDataset(String pId, XYDataset pDataset) {
    if (chart == null) {
        setupChart(pId, pDataset);
    } else {
        XYPlot plot = (XYPlot) chart.getPlot();
        plot.setDataset(plot.getDatasetCount(), pDataset);
        NumberAxis axis = new NumberAxis(pId);
        NumberFormat nf = NumberFormat.getInstance();
        nf.setMinimumFractionDigits(0);
        nf.setMaximumFractionDigits(0);
        axis.setNumberFormatOverride(nf);
        plot.setRangeAxis(plot.getDatasetCount() - 1, axis);
        plot.setRangeAxisLocation(plot.getDatasetCount() - 1, AxisLocation.TOP_OR_LEFT);
        plot.mapDatasetToRangeAxis(plot.getDatasetCount() - 1, plot.getDatasetCount() - 1);
        XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer();
        renderer.setSeriesLinesVisible(0, jShowLines.isSelected());
        renderer.setSeriesShapesVisible(0, jShowDataPoints.isSelected());
        plot.setRenderer(plot.getDatasetCount() - 1, renderer);
        renderer.setDefaultItemLabelsVisible(jShowItemValues.isSelected());
        renderer.setDefaultItemLabelGenerator(new org.jfree.chart.labels.StandardXYItemLabelGenerator());
        renderer.setDefaultToolTipGenerator(new StandardXYToolTipGenerator(StandardXYToolTipGenerator.DEFAULT_TOOL_TIP_FORMAT, new SimpleDateFormat("dd.MM.yyyy HH:mm:ss"), NumberFormat.getInstance()));
        axis.setAxisLinePaint(plot.getLegendItems().get(plot.getDatasetCount() - 1).getLinePaint());
        axis.setLabelPaint(plot.getLegendItems().get(plot.getDatasetCount() - 1).getLinePaint());
        axis.setTickLabelPaint(plot.getLegendItems().get(plot.getDatasetCount() - 1).getLinePaint());
        axis.setTickMarkPaint(plot.getLegendItems().get(plot.getDatasetCount() - 1).getLinePaint());
    }
}
 

/**
 * 将offset转化成字符串形式<br>
 * 左补零对齐至20位
 */
public static String offset2FileName(final long offset) {
    final NumberFormat nf = NumberFormat.getInstance();
    nf.setMinimumIntegerDigits(20);
    nf.setMaximumFractionDigits(0);
    nf.setGroupingUsed(false);
    return nf.format(offset);
}
 

/**
 * Format the passed value according to the rules specified by the given
 * locale.
 *
 * @param aValue
 *        The value to be formatted. May not be <code>null</code>.
 * @param nFractionDigits
 *        The number of fractional digits to use. Must be &ge; 0.
 * @param aDisplayLocale
 *        The locale to be used. May not be <code>null</code>.
 * @return The formatted string.
 */
@Nonnull
public static String getFormatted (@Nonnull final BigDecimal aValue,
                                   @Nonnegative final int nFractionDigits,
                                   @Nonnull final Locale aDisplayLocale)
{
  ValueEnforcer.notNull (aValue, "Value");
  ValueEnforcer.notNull (aDisplayLocale, "DisplayLocale");

  final NumberFormat aNF = NumberFormat.getInstance (aDisplayLocale);
  aNF.setMinimumFractionDigits (nFractionDigits);
  aNF.setMaximumFractionDigits (nFractionDigits);
  return aNF.format (aValue);
}
 

private CharSequence styleLengthText(@NonNull Context context, double meters, WidgetSettings.LengthUnit units)
{
    NumberFormat formatter = NumberFormat.getInstance();
    formatter.setMinimumFractionDigits(0);
    formatter.setMaximumFractionDigits(2);
    if (meters < Double.POSITIVE_INFINITY)
        return SuntimesUtils.formatAsHeight(context, meters, units, 2, true).toString();
    else return formatter.format(meters);
}
 

static void testFormatting() {
    boolean failed = false;
    Locale[] locales = {
        Locale.US,
        Locale.JAPAN,
        Locale.GERMANY,
        Locale.ITALY,
        new Locale("it", "IT", "EURO") };
    Currency[] currencies = {
        null,
        Currency.getInstance("USD"),
        Currency.getInstance("JPY"),
        Currency.getInstance("DEM"),
        Currency.getInstance("EUR"),
    };
    String[][] expecteds = {
        {"$1,234.56", "$1,234.56", "JPY1,235", "DEM1,234.56", "EUR1,234.56"},
        {"\uFFE51,235", "USD1,234.56", "\uFFE51,235", "DEM1,234.56", "EUR1,234.56"},
        {"1.234,56 \u20AC", "1.234,56 USD", "1.235 JPY", "1.234,56 DM", "1.234,56 \u20AC"},
        {"\u20AC 1.234,56", "USD 1.234,56", "JPY 1.235", "DEM 1.234,56", "\u20AC 1.234,56"},
        {"\u20AC 1.234,56", "USD 1.234,56", "JPY 1.235", "DEM 1.234,56", "\u20AC 1.234,56"},
    };

    for (int i = 0; i < locales.length; i++) {
        Locale locale = locales[i];
        NumberFormat format = NumberFormat.getCurrencyInstance(locale);
        for (int j = 0; j < currencies.length; j++) {
            Currency currency = currencies[j];
            String expected = expecteds[i][j];
            if (currency != null) {
                format.setCurrency(currency);
                int digits = currency.getDefaultFractionDigits();
                format.setMinimumFractionDigits(digits);
                format.setMaximumFractionDigits(digits);
            }
            String result = format.format(1234.56);
            if (!result.equals(expected)) {
                failed = true;
                System.out.println("FAIL: Locale " + locale
                    + (currency == null ? ", default currency" : (", currency: " + currency))
                    + ", expected: " + expected
                    + ", actual: " + result);
            }
        }
    }

    if (failed) {
        throw new RuntimeException();
    }
}
 

public String toString() {
	StringBuffer str = new StringBuffer();

	NumberFormat nf = NumberFormat.getInstance();
	nf.setMaximumFractionDigits(0);

	// append latent variable names
	for (Variable latent : _prior.getVariables()) {
		str.append(latent.getName());
		str.append(" ");
	}

	// append latent states and prior distribution
	str.append("[");

	List<Variable> latents = _prior.getVariables();
	int nLatents = _prior.getDimension();
	int[] states = new int[nLatents];
	int card = getLatentCardinality();

	for (int i = 0; i < card; i++) {
		_prior.computeStates(i, states);

		for (int j = 0; j < nLatents; j++) {
			str.append(latents.get(j).getStates().get(states[j]));
		}

		if (i < card - 1) {
			str.append(";");
		}
	}

	str.append("|");

	double[] prior = _prior.getCells();

	for (int i = 0; i < card; i++) {
		str.append(nf.format(prior[i] * 100));

		if (i < card - 1) {
			str.append(";");
		}
	}

	str.append("]: ");

	// append the list of selected manifest variables
	int nManifests = _selectedManifests.size();
	List<Double> pmiSeq = getSelectedPmiSeq();
	List<Double> cmiSeq = getSelectedCmiSeq();

	for (int i = 0; i < nManifests; i++) {
		Variable manifest = _selectedManifests.get(i);

		// append manifest variable name
		str.append(manifest.getName());
		str.append(" [");

		// append class-conditional probability P(X=1|Y=j)
		for (int j = 0; j < card; j++) {
			str
					.append(nf.format(_ccpds.get(j).get(manifest)
							.getCells()[1] * 100));

			if (j < card - 1) {
				str.append(";");
			}
		}

		str.append("|");

		// append pairwise and cumulative information coverage
		str.append(nf.format(pmiSeq.get(i) * 100 / _tmi));
		str.append(";");
		str.append(nf.format(cmiSeq.get(i) * 100 / _tmi));

		str.append("]");
		if (i < nManifests - 1) {
			str.append(", ");
		}
	}

	return str.toString();
}
 

protected Vector1DFormatAbstractTest() {
    vector1DFormat = Vector1DFormat.getInstance(getLocale());
    final NumberFormat nf = NumberFormat.getInstance(getLocale());
    nf.setMaximumFractionDigits(2);
    vector1DFormatSquare = new Vector1DFormat("[", "]", nf);
}
 

private static String doubleToString(double val, int maxFractionDigits, int minFractionDigits) {
    NumberFormat f = NumberFormat.getNumberInstance(Locale.US); 
    f.setMaximumFractionDigits(maxFractionDigits);
    f.setMinimumFractionDigits(minFractionDigits);
    return f.format(val); 
}
 

public RealMatrixFormatAbstractTest() {
    realMatrixFormat = RealMatrixFormat.getInstance(getLocale());
    final NumberFormat nf = NumberFormat.getInstance(getLocale());
    nf.setMaximumFractionDigits(2);
    realMatrixFormatOctave = new RealMatrixFormat("[", "]", "", "", "; ", ", ", nf);
}
 

@Override
   public List<ItemRatingDTO> getRatingCriteriaDtos(Long contentId, Long toolSessionId, Collection<Long> itemIds,
    boolean isCommentsByOtherUsersRequired, Long userId) {

// fail safe - if there are no items, don't try to look anything up! LDEV-4094
if (itemIds == null || itemIds.isEmpty()) {
    return new LinkedList<>();
}

//initial preparations
NumberFormat numberFormat = NumberFormat.getInstance(Locale.US);
numberFormat.setMaximumFractionDigits(1);
List<RatingCriteria> criterias = getCriteriasByToolContentId(contentId);
boolean isSingleItem = itemIds.size() == 1;
Long singleItemId = isSingleItem ? itemIds.iterator().next() : null;

//handle comments criteria
List<ItemRatingDTO> itemDtos = handleCommentsCriteria(criterias, toolSessionId, itemIds,
	isCommentsByOtherUsersRequired, userId);

//get all data from DB
List<Rating> userRatings = ratingDAO.getRatingsByUser(contentId, userId.intValue());
List<Object[]> itemsStatistics;
if (isSingleItem) {
    itemsStatistics = ratingDAO.getRatingAverageByContentAndItem(contentId, toolSessionId, singleItemId);

    // query DB using itemIds
} else {
    itemsStatistics = ratingDAO.getRatingAverageByContentAndItems(contentId, toolSessionId, itemIds);
}

//handle all criterias except for comments' one
for (ItemRatingDTO itemDto : itemDtos) {
    Long itemId = itemDto.getItemId();
    List<ItemRatingCriteriaDTO> criteriaDtos = new LinkedList<>();
    itemDto.setCriteriaDtos(criteriaDtos);

    for (RatingCriteria criteria : criterias) {
	Long criteriaId = criteria.getRatingCriteriaId();

	//comments' criteria are handled earlier, at the beginning of this function
	if (criteria.getRatingStyle() == 0) {
	    continue;
	}

	ItemRatingCriteriaDTO criteriaDto = new ItemRatingCriteriaDTO();
	criteriaDto.setRatingCriteria(criteria);

	// set user's rating
	Rating userRating = null;
	for (Rating userRatingIter : userRatings) {
	    if (userRatingIter.getItemId().equals(itemId)
		    && userRatingIter.getRatingCriteria().getRatingCriteriaId().equals(criteriaId)) {
		userRating = userRatingIter;
	    }
	}
	String userRatingStr = userRating == null ? "" : numberFormat.format(userRating.getRating());
	criteriaDto.setUserRating(userRatingStr);

	// check if there is any data returned from DB regarding this item and criteria
	Object[] itemStatistics = null;
	for (Object[] itemStatisticsIter : itemsStatistics) {
	    Long itemIdIter = (Long) itemStatisticsIter[0];
	    Long ratingCriteriaIdIter = (Long) itemStatisticsIter[1];

	    if (itemIdIter.equals(itemId) && ratingCriteriaIdIter.equals(criteriaId)) {
		itemStatistics = itemStatisticsIter;
	    }
	}

	if (itemStatistics != null) {
	    Number averageRating = (Number) itemStatistics[2];
	    criteriaDto.setAverageRating(numberFormat.format(averageRating));
	    criteriaDto.setAverageRatingAsNumber(averageRating);
	    criteriaDto.setNumberOfVotes(String.valueOf(itemStatistics[3]));
	} else {
	    criteriaDto.setAverageRating("0");
	    criteriaDto.setAverageRatingAsNumber(0);
	    criteriaDto.setNumberOfVotes("0");
	}

	criteriaDtos.add(criteriaDto);

    }

}

return itemDtos;
   }
 

/**
 * @param args the command line arguments
 */
@SuppressWarnings("ManualArrayToCollectionCopy")
public static void main(String[] args) throws Exception {
       
	BufferedReader aseReader = new BufferedReader(new FileReader("D:\\ASEcheck\\geuvadis_maskAll4_r20_a10_p2_s1_rq17_m1_gatkGenoGq30\\ase_bh.txt"));
       BufferedReader aseReader2 = new BufferedReader(new FileReader("D:\\ASEcheck\\all_maskAll4_r20_a10_p2_s5_rq17_m1_gatkGenoGq30\\ase_bh.txt"));
       
       HashMap<String, AseVariantBean> aseEffects = new HashMap<String, AseVariantBean>();
       HashSet<String> totalEffects = new HashSet<String>();

       String line;
       String[] elements;
       //Header
       aseReader.readLine();
	while ((line = aseReader.readLine()) != null) {
           elements = TAB_PATTERN.split(line);
		aseEffects.put(elements[7],new AseVariantBean(elements));
	}
       aseReader.close();
       
       
	int aseTotalInFile2 = 0;
	int asePresentInBoth = 0;
	int sameDirection = 0;
	int oppositeDirection = 0;

	aseReader2.readLine();//header
	line = null;
	elements = null;
	while ((line = aseReader2.readLine()) != null) {
           ++aseTotalInFile2;
		elements = TAB_PATTERN.split(line);	
           AseVariantBean currentEffect = new AseVariantBean(elements);
           totalEffects.add(currentEffect.getId().toString());
           
           if(aseEffects.containsKey(currentEffect.getId().toString())){
               AseVariantBean otherEffect =  aseEffects.get(currentEffect.getId().toString());
               asePresentInBoth++;
               if(otherEffect.getEffect()<0.5 && currentEffect.getEffect()<0.5){
                   sameDirection++;
               } else if(otherEffect.getEffect()>0.5 && currentEffect.getEffect()>0.5){
                   sameDirection++;
               } else {
                   oppositeDirection++;
               }
           }
	}
       totalEffects.addAll(aseEffects.keySet());
       aseReader2.close();
       
	NumberFormat numberFormat = NumberFormat.getInstance();
	numberFormat.setMinimumFractionDigits(2);
	numberFormat.setMaximumFractionDigits(2);
	System.out.println("Ase effects in file 1: " + aseEffects.size());
       System.out.println("Ase effects in file 2: " + aseTotalInFile2);
       System.out.println("Total unique Ase effects observed : " + totalEffects.size());
	System.out.println("Ase effects identified in both analyses: " + asePresentInBoth + " (" + numberFormat.format(asePresentInBoth / (double) totalEffects.size()) + ")");
	System.out.println(" - Same direction: " + sameDirection + " (" + numberFormat.format(sameDirection / (double) asePresentInBoth) + ")");
	System.out.println(" - Opposite direction: " + oppositeDirection + " (" + numberFormat.format(oppositeDirection / (double) asePresentInBoth) + ")");

}
 

/**
 * Create a default number format.  The default number format is based on
 * {@link NumberFormat#getNumberInstance(java.util.Locale)} with the only
 * customizing is the maximum number of BigFraction digits, which is set to 0.
 * @param locale the specific locale used by the format.
 * @return the default number format specific to the given locale.
 */
protected static NumberFormat getDefaultNumberFormat(final Locale locale) {
    final NumberFormat nf = NumberFormat.getNumberInstance(locale);
    nf.setMaximumFractionDigits(0);
    nf.setParseIntegerOnly(true);
    return nf;
}
 

/**
 * Create a default number format.  The default number format is based on
 * {@link NumberFormat#getNumberInstance(java.util.Locale)} with the only
 * customizing is the maximum number of BigFraction digits, which is set to 0.
 * @param locale the specific locale used by the format.
 * @return the default number format specific to the given locale.
 */
protected static NumberFormat getDefaultNumberFormat(final Locale locale) {
    final NumberFormat nf = NumberFormat.getNumberInstance(locale);
    nf.setMaximumFractionDigits(0);
    nf.setParseIntegerOnly(true);
    return nf;
}
 

/**
 * Create a default number format.  The default number format is based on
 * {@link NumberFormat#getNumberInstance(java.util.Locale)} with the only
 * customizing is the maximum number of BigFraction digits, which is set to 0.  
 * @param locale the specific locale used by the format.
 * @return the default number format specific to the given locale.
 */
protected static NumberFormat getDefaultNumberFormat(final Locale locale) {
    final NumberFormat nf = NumberFormat.getNumberInstance(locale);
    nf.setMaximumFractionDigits(0);
    nf.setParseIntegerOnly(true);
    return nf;
}
 

/**
 * Create a default number format.  The default number format is based on
 * {@link NumberFormat#getInstance(java.util.Locale)} with the only
 * customizing that the maximum number of fraction digits is set to 2.
 * @param locale the specific locale used by the format.
 * @return the default number format specific to the given locale.
 */
protected static NumberFormat getDefaultNumberFormat(final Locale locale) {
    final NumberFormat nf = NumberFormat.getInstance(locale);
    nf.setMaximumFractionDigits(2);
    return nf;
}