number2String with grouping and max fraction digit added

jlolling · May 19, 2021 · 71c9dfe · 71c9dfe
1 parent 6add1e7
commit 71c9dfe
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Showing 2 changed files with 37 additions and 2 deletions.
diff --git a/src/routines/NumberUtil.java b/src/routines/NumberUtil.java
@@ -436,7 +436,7 @@ public static String numberToPercent2Scale(Double number) {
      */
 	public static String numberToString(Number number) {
 		if (number != null) {
-			NumberFormat nf = NumberFormat.getInstance(Locale.GERMANY);
+			NumberFormat nf = NumberFormat.getInstance(Locale.ENGLISH);
 			return nf.format(number);
 		} else {
 			return "";
@@ -451,6 +451,32 @@ public static String numberToString(Number number) {
      * {talendTypes} String
      * 
      * {param} double(2.5) number: number to format
+     * {param} boolean(false) german: number to format
+     * {param} boolean(false) grouping: number to format
+     * {param} int(2) maxfraction: number to format
+     * 
+     * {example} numberToString(1234.12345,false,false,2) result: "1,234.12345"
+     * 
+     */
+	public static String numberToString(Number number, boolean german, boolean grouping, int maxFractionDigits) {
+		if (number != null) {
+			NumberFormat nf = NumberFormat.getInstance(german ? Locale.GERMAN : Locale.ENGLISH);
+			nf.setGroupingUsed(grouping);
+			nf.setMaximumFractionDigits(maxFractionDigits);
+			return nf.format(number);
+		} else {
+			return "";
+		}
+	}
+
+	/**
+     * formats the number
+     * 
+     * {Category} NumberUtil
+     * 
+     * {talendTypes} String
+     * 
+     * {param} double(2.5) number: number to format
      * 
      * {example} numberToStringRoundScale2(1234.12345) result: "1.234,12"
      * 

diff --git a/src_test/routines/test/TestNumberUtil.java b/src_test/routines/test/TestNumberUtil.java
@@ -19,7 +19,7 @@ public void testSortLongNumberList() throws Exception {
 
 	@Test
 	public void testRoundScaleN() {
-		double expected = 6.675d;
+		double expected = 6.68d;
 		double test = 6.675000000000003d;
 		int precision = 2;
 		double actual = NumberUtil.roundScaleN(test, precision);
@@ -37,4 +37,13 @@ public void testEqualsWithPrecision() {
 		assertTrue("Positive test failed", NumberUtil.equals(t1, t2, precision));
 	}
 
+	@Test
+	public void testNumber2String() {
+		double d = 100000000d;
+		String expected = "100000000";
+		String actual = NumberUtil.numberToString(d, false, false, 4);
+		System.out.println(actual);
+		assertEquals("Format wrong", expected, actual);
+	}
+
 }