Summary

Adding support for the compact/short number formatting in JDK.

Problem

The existing NumberFormat APIs provide support for formatting/parsing general purpose numbers e.g. decimal, currency, and percentage, but the support for formatting in compact forms of numbers is not available.

Solution

Add the support for formatting the numbers in compact forms. Each locale has different compact forms for representing a number, hence a number can be formatted in multiple ways across locales.

For Example:

• 1000 can be formatted as "1K", and 1000000 as 1M in "en_US" locale
• 1000 can be formatted as "1 हज़ार", and 50000000 as "5 क." In "hi_IN" locale

CLDR provides patterns for compact number formatting. These resources can be utilized to add locale specific compact number formatting support.

Following major public APIs are introduced for compact number formatting feature:

CompactNumberFormat class targeted for compact number formatting

public class CompactNumberFormat extends NumberFormat

NumberFormat.Style enum for specifying the format style

public static enum NumberFormat.Style

Addition of two fields in "java.text.NumberFormat.Field" which can be used to track the position of prefix and suffix in the resulting output.

public static final NumberFormat.Field PREFIX
public static final NumberFormat.Field SUFFIX

public factory methods in NumberFormat.java to obtain CompactNumberFormat instance

public static NumberFormat getCompactNumberInstance()
public static NumberFormat getCompactNumberInstance(Locale locale,
                                             NumberFormat.Style formatStyle)

Provider method in java/text/spi/NumberFormatProvider

public NumberFormat getCompactNumberInstance(Locale locale, NumberFormat.Style formatStyle)

Specification

http://cr.openjdk.java.net/~arapte/nishjain/8177552/specdiff_cnf.21/overview-summary.html

Serialized form

http://cr.openjdk.java.net/~arapte/nishjain/8177552/specdiff_cnf.21/serialized-form.html#java.text.CompactNumberFormat