JDK-8039915 : Wrong NumberFormat.format() HALF_UP rounding when last digit exactly at rounding position greater than 5
- Type: Bug
- Component: core-libs
- Sub-Component: java.text
- Affected Version: 8,9
- Priority: P3
- Status: Closed
- Resolution: Fixed
- OS: generic
- CPU: generic
- Submitted: 2014-04-09
- Updated: 2019-05-15
- Resolved: 2014-10-14
The Version table provides details related to the release that this issue/RFE will be addressed.
Unresolved : Release in which this issue/RFE will be addressed.
Resolved: Release in which this issue/RFE has been resolved.
Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.
To download the current JDK release, click here.
Unresolved : Release in which this issue/RFE will be addressed.
Resolved: Release in which this issue/RFE has been resolved.
Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.
To download the current JDK release, click here.
| JDK 8 | JDK 9 |
|---|---|
8u40Fixed  |
9 b36Fixed |
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Description
FULL PRODUCT VERSION :
java version "1.8.0"
Java(TM) SE Runtime Environment (build 1.8.0-b132)
Java HotSpot(TM) Server VM (build 25.0-b70, mixed mode)
ADDITIONAL OS VERSION INFORMATION :
Linux paris 2.6.32-220.4.1.el6.i686 #1 SMP Mon Feb 6 16:10:45 CET 2012 i686 i686 i386 GNU/Linux
A DESCRIPTION OF THE PROBLEM :
Formating 0.950000550000 to a six fraction digits works properly, I get "0.950001".
Formating 0.950000600000 to a six fraction digits works wrong, I get "0.95" instead of "0.950001".
REGRESSION. Last worked in version 7u51
REPRODUCIBILITY :
This bug can be reproduced always.
---------- BEGIN SOURCE ----------
@Test
public void test_roundingOfDoubleValues() {
NumberFormat format = DecimalFormat.getInstance( Locale.US );
format.setGroupingUsed( false );
format.setMaximumFractionDigits( 6 );
format.setRoundingMode( RoundingMode.HALF_UP );
String val95000055 = format.format( 0.950000550000 );
assertEquals( "0.950001", val95000055 ); // this is okay
String val95000060 = format.format( 0.950000600000 );
assertEquals( "0.950001", val95000060 ); // this provides an error
}
---------- END SOURCE ----------
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