Java Internationalization - Formatting Patterns

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Followings is the use of characters in formatting patterns.

Sr.No. Class & Description
1

0

To display 0 if less digits are present.
2

#

To display digit ommitting leading zeroes.
3

.

Decimal separator.
4

,

Grouping separator.
5

E

Mantissa and Exponent separator for exponential formats.
6

;

Format separator.
7

-

Negative number prefix.
8

%

Shows number as percentage after multiplying with 100.
9

?

Shows number as mille after multiplying with 1000.
10

X

To mark character as number prefix/suffix.
11

'

To mark quote around special characters.

Example

In this example, we're formatting numbers based on different patterns.

 import java.text.DecimalFormat; public class I18NTester { public static void main(String[] args) { String pattern = "###.###"; double number = 123456789.123; DecimalFormat numberFormat = new DecimalFormat(pattern); System.out.println(number); //pattern ###.### System.out.println(numberFormat.format(number)); //pattern ###.# numberFormat.applyPattern("###.#"); System.out.println(numberFormat.format(number)); //pattern ###,###.## numberFormat.applyPattern("###,###.##"); System.out.println(numberFormat.format(number)); number = 9.34; //pattern 000.### numberFormat.applyPattern("000.##"); System.out.println(numberFormat.format(number)); } }

Output

It will print the following result.

 1.23456789123E8 123456789.123 123456789.1 123,456,789.12 009.34
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