X-Git-Url: http://gitweb.fperrin.net/?p=GpsPrune.git;a=blobdiff_plain;f=src%2Ftim%2Fprune%2Fdata%2FNumberUtils.java;fp=src%2Ftim%2Fprune%2Fdata%2FNumberUtils.java;h=652e8243af2fc85d01dfb2940bc007bc0c755927;hp=0000000000000000000000000000000000000000;hb=ce6f2161b8596f7018d6a76bff79bc9e571f35fd;hpb=2d8cb72e84d5cc1089ce77baf1e34ea3ea2f8465

diff --git a/src/tim/prune/data/NumberUtils.java b/src/tim/prune/data/NumberUtils.java
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+++ b/src/tim/prune/data/NumberUtils.java
@@ -0,0 +1,55 @@
+package tim.prune.data;
+
+import java.text.DecimalFormat;
+import java.text.NumberFormat;
+import java.util.Locale;
+
+/**
+ * Abstract class to offer general number manipulation functions
+ */
+public abstract class NumberUtils
+{
+	/** UK-specific number formatter object to avoid lots of instantiations */
+	private static final NumberFormat UK_FORMAT = NumberFormat.getNumberInstance(Locale.UK);
+	// Select the UK locale for this formatter so that decimal point is always used (not comma)
+	static {
+		if (UK_FORMAT instanceof DecimalFormat) ((DecimalFormat) UK_FORMAT).applyPattern("0.000");
+	}
+
+	/**
+	 * Find the number of decimal places represented in the String
+	 * @param inString String to check
+	 * @return number of decimal places, or 0 for integer value
+	 */
+	public static int getDecimalPlaces(String inString)
+	{
+		if (inString == null || inString.equals("")) {return 0;}
+		int places = 0;
+		final int sLen = inString.length();
+		for (int i=sLen-1; i>=0; i--) {
+			char c = inString.charAt(i);
+			if (c >= '0' && c <= '9') {
+				// Numeric character found
+				places++;
+			}
+			else {
+				// Non-numeric character found, return places
+				return places;
+			}
+		}
+		// No non-numeric characters found, so must be integer
+		return 0;
+	}
+
+	/**
+	 * Format the given number in UK format (decimal point) to the given number of decimal places
+	 * @param inNumber double number to format
+	 * @param inDecimalPlaces number of decimal places
+	 */
+	public static String formatNumberUk(double inNumber, int inDecimalPlaces)
+	{
+		UK_FORMAT.setMaximumFractionDigits(inDecimalPlaces);
+		UK_FORMAT.setMinimumFractionDigits(inDecimalPlaces);
+		return UK_FORMAT.format(inNumber);
+	}
+}
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