Feb 19

The NumberFormat and DecimalFormat classes provide support for parsing and formatting currency values.

For example to parse a string containing a money value in the default locale you can use the following.

   NumberFormat format = NumberFormat.getCurrencyInstance();
   Object value = format.parse("$5.45");

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Feb 16

The NumberFormat class provides support for currency formatting. By current default Locale is used to determine what currency the value should be formatted in.

double value = 6.34;
NumberFormat formatter = NumberFormat.getCurrencyInstance();
String formatted = formatter.format(value);

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May 04

Following shows how to use a loop to determine the breakdown of change for a given amount, minimising the number of notes and coins used.

		int[] denominations = { 500, 200, 100, 50, 20, 10, 5, 2, 1 };
		int amount = 687;
		int[] count = new int[denominations.length];
		for (int i=0; i<denominations.length; i++) {
			while (amount>=denominations[i]) {
				count[i]++;
				amount -= denominations[i];
			}
		}
		System.out.println(Arrays.toString(count));

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