Change project from java-numbers to java-numbers-3

2020-05-30 05:22:10 +01:00
parent a5f47f8fa8
commit 5cfe661c8a
2 changed files with 3 additions and 1 deletions
@@ -0,0 +1,44 @@
+package com.baeldung.formatNumber;
+
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+import java.text.DecimalFormat;
+import java.text.NumberFormat;
+import java.util.Locale;
+
+public class FormatNumber {
+        public static double withBigDecimal(double value, int places) {
+                if (places < 0)
+                        throw new IllegalArgumentException();
+
+                BigDecimal bigDecimal = new BigDecimal(value);
+                bigDecimal = bigDecimal.setScale(places, RoundingMode.HALF_UP);
+                return bigDecimal.doubleValue();
+        }
+
+        public static double withMathRound(double value, int places) {
+                double scale = Math.pow(10, places);
+                return Math.round(value * scale) / scale;
+        }
+
+        public static double withDecimalFormatPattern(double value, int places) {
+                DecimalFormat df2 = new DecimalFormat("#,###,###,##0.00");
+                DecimalFormat df3 = new DecimalFormat("#,###,###,##0.000");
+                if (places == 2)
+                        return new Double(df2.format(value));
+                else if (places == 3)
+                        return new Double(df3.format(value));
+                else
+                        throw new IllegalArgumentException();
+        }
+
+        public static double withDecimalFormatLocal(double value) {
+                DecimalFormat df = (DecimalFormat) NumberFormat.getNumberInstance(Locale.getDefault());
+                return new Double(df.format(value));
+        }
+
+        public static String withStringFormat(double value, int places) {
+                return String.format("%." + places + "f", value);
+        }
+}
+