NumberUtil.java

package com.earth2me.essentials.utils;

import static com.earth2me.essentials.I18n.tl;
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.util.Locale;
import net.ess3.api.IEssentials;


public class NumberUtil
{
	static DecimalFormat twoDPlaces = new DecimalFormat("#,###.##");
	static DecimalFormat currencyFormat = new DecimalFormat("#0.00", DecimalFormatSymbols.getInstance(Locale.US));

	public static String shortCurrency(final BigDecimal value, final IEssentials ess)
	{
		return ess.getSettings().getCurrencySymbol() + formatAsCurrency(value);
	}

	public static String formatDouble(final double value)
	{
		twoDPlaces.setRoundingMode(RoundingMode.HALF_UP);
		return twoDPlaces.format(value);
	}

	public static String formatAsCurrency(final BigDecimal value)
	{
		currencyFormat.setRoundingMode(RoundingMode.FLOOR);
		String str = currencyFormat.format(value);
		if (str.endsWith(".00"))
		{
			str = str.substring(0, str.length() - 3);
		}
		return str;
	}

	public static String displayCurrency(final BigDecimal value, final IEssentials ess)
	{
		return tl("currency", ess.getSettings().getCurrencySymbol(), formatAsCurrency(value));
	}

	public static boolean isInt(final String sInt)
	{
		try
		{
			Integer.parseInt(sInt);
		}
		catch (NumberFormatException e)
		{
			return false;
		}
		return true;
	}
}