Split util classes.

Essentials/src/com/earth2me/essentials/utils/NumberUtil.java

@@ -0,0 +1,56 @@
+package com.earth2me.essentials.utils;
+
+import static com.earth2me.essentials.I18n._;
+import com.earth2me.essentials.IEssentials;
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+import java.text.DecimalFormat;
+import java.text.DecimalFormatSymbols;
+import java.util.Locale;
+
+
+public class NumberUtil
+{
+	static DecimalFormat threeDPlaces = 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)
+	{
+		threeDPlaces.setRoundingMode(RoundingMode.HALF_UP);
+		return threeDPlaces.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 _("currency", ess.getSettings().getCurrencySymbol(), formatAsCurrency(value));
+	}
+
+	public static boolean isInt(final String sInt)
+	{
+		try
+		{
+			Integer.parseInt(sInt);
+		}
+		catch (NumberFormatException e)
+		{
+			return false;
+		}
+		return true;
+	}
+}