Java Internapzation - Formatting Patterns

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.

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

IOTester.java

import java.text.DecimalFormat;

pubpc class I18NTester {
   pubpc 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
1,2345,6789.12

Java Internapzation - Formatting Patterns

Output

友情链接