J2SE Version (please include all output from java -version flag):
  C:\java\j2sdk1.5.0_beta2\bin>java -version
   java version "1.5.0-beta2"
   Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-beta2-b51)
   Java HotSpot(TM) Client VM (build 1.5.0-beta2-b51, mixed mode, sharing)

Does this problem occur on J2SE 1.4 or 1.4.1 or 1.4.2? Yes / No (pick one)
   NO

Operating System Configuration Information (be specific):
  OS Name Microsoft Windows XP Professional
  Version 5.1.2600 Service Pack 1 Build 2600

Bug Description:
  Behavior of BigDecimal.toString has changed. In J2SE 1.4.x and prior, the
  BigDecimal.toString method returned the string representation of the value
  1E-15 as 0.000000000000001. In J2SE 1.5 the toString method returns the
  value 1E-15 as 1.0E-15.

  While I understand this was done intentionally, this does cause a problem
  in our product which makes J2SE 1.5 not backward compatible with our product.

  It is easy enough to fix in our product, but I felt we should at least point
  out the issue.

Steps to Reproduce (be specific):

BigDecimal bd = new BigDecimal("1E-15");
String val = bd.toString();

                bd = new BigDecimal(".000000000000001");
                val = bd.toString();

The value returned by both two string methods will be different when run against 1.4 vs 1.5

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