Bug ID: JDK-6806261 BigDecimal.longValueExact() method throws NullPointerException

Type: Bug
Component: core-libs
Sub-Component: java.math
Affected Version: 6u14

Priority: P2
Status: Resolved
Resolution: Fixed
OS: generic
CPU: generic

Submitted: 2009-02-17
Updated: 2010-05-11
Resolved: 2009-03-07

JDK 6	JDK 7
6u14 b03Fixed	7Fixed

BigDecimal.longValueExact() method throws NullpointerException with 6u14-b01 build.
Following testcase could be used to reproduce the issue.

<Code>

import java.math.BigDecimal;
class BigDecimalTest
{
 public static void main(String... args){
        try {
			  String longValue = "9223372036854775807.0";
              BigDecimal bd = new BigDecimal(longValue);
              long longvalue= bd.longValue();
              long longValueExact = bd.longValueExact();
              System.out.println("Test passed ");
        } catch(ArithmeticException e) {             
			 System.out.println("Test failed ");
             e.printStackTrace();
        }

    }
}

</Code>

<Output>
Exception in thread "main" java.lang.NullPointerException
        at java.math.BigDecimal$LongOverflow.check(BigDecimal.java:2974)
        at java.math.BigDecimal.longValueExact(BigDecimal.java:2962)
        at BigDecimalTest.main(BigDecimalTest.java:9)

</Output>

java version "1.6.0_14"
Java(TM) SE Runtime Environment (build 1.6.0_14-b01)
Java HotSpot(TM) Client VM (build 11.2-b01, mixed mode)


This test passes with the 6u12-b04 promoted build. Fix for the bug 6622432 may have caused this regression.

EVALUATION The root cause of the NullPointerException in the test case is that we try to refer intVal before actually calling inflate(). The fix is to add inflate() call.

17-02-2009

Relates :	JDK-6876282 - BigDecimal's divide(BigDecimal bd, RoundingFormat r) produces incorrect result
Relates :	JDK-6622432 - RFE: Performance improvements to java.math.BigDecimal