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Add NumberFormatter #1793

Merged
merged 1 commit into from Sep 6, 2018
Merged

Add NumberFormatter #1793

merged 1 commit into from Sep 6, 2018

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@jodastephen
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@jodastephen jodastephen commented Sep 5, 2018

Thread-safe wrapper around DecimalFormat/NumberFormat.
ThreadLocal is 2.5x faster than clone() for common cases.

Thread-safe wrapper around DecimalFormat/NumberFormat
ThreadLocal is 2.5x faster than clone() for common cases
@jodastephen jodastephen requested a review from cjkent Sep 5, 2018
* The integer part will be grouped if the flag is set.
* The decimal part will never be grouped or truncated.
* The implementation uses English locale data, which uses commas as a separator and a decimal point (dot).
* Numbers will be rounded using {@link RoundingMode#HALF_EVEN}

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@cjkent

cjkent Sep 6, 2018
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Why HALF_EVEN and not HALF_UP? HALF_UP is the "standard" rounding mode everyone learns at school. From the Javadocs for HALF_UP

Note that this is the rounding mode commonly taught at school.

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@jodastephen

jodastephen Sep 6, 2018
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It is what DecimalFormat uses.

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@cjkent

cjkent Sep 6, 2018
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So it does. That surprises me.

@cjkent
cjkent approved these changes Sep 6, 2018
@cjkent cjkent merged commit b3a799c into master Sep 6, 2018
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@cjkent cjkent deleted the topic/number-formatter branch Sep 6, 2018
@jodastephen jodastephen added this to the v2.1 milestone Oct 24, 2018
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