FULL PRODUCT VERSION :
java version " 1.8.0-ea "
Java(TM) SE Runtime Environment (build 1.8.0-ea-b99)
Java HotSpot(TM) 64-Bit Server VM (build 25.0-b41, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Linux kisa 3.8.0-26-generic #38-Ubuntu SMP Mon Jun 17 21:43:33 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

A DESCRIPTION OF THE PROBLEM :
Now it easy to create a BigInteger object so large that its methods work incorrectly.
This bug report is about methods BigInteger.doubleValue() and BigInteger.floatValue().
They may return <0.0> on such an object,
I expect that either they return <Infinity> or construction of such an object throws ArithemticException.

This bug is related to
JDK-8011942 : BigInteger returns an int for bitLength()
JDK-6910473 : java.math.BigInteger.bitLength() may return negative " int " on large numbers


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Compile attached test code and run it.


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
ArithmeticException in shiftLeft method

or

bi.floatValue() = Infinity
bi.doubleValue() = Infinity

ACTUAL -
bi.floatValue() = 0.0
bi.doubleValue() = 0.0


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
public class DoubleValueTest {
    
    public static void main(String[] args) {
        BigInteger bi = BigInteger.valueOf(2).shiftLeft(Integer.MAX_VALUE);
        System.out.println( " bi.floatValue() = " + bi.floatValue());
        System.out.println( " bi.doubleValue() = " + bi.doubleValue());
    }
    
}

---------- END SOURCE ----------