Development Environment jdk1.5, deployment environment jdk1.4 bigdecimal Problems

The development environment is jdk1.5, the deployment environment is jdk1.4, compiled with antProgram-Source 1.4 has been specified at the time, no problem in the past, a problem has occurred recently. Google, it was found that bigdecimal was used,

From: http://bugs.sun.com/bugdatabase/view_bug.do? Bug_id = 6226858

As part of JSR 13, a new constructor, bigdecimal (INT Val), was added to bigdecimal in JDK 5. Therefore, in 1.4 and earlier

New bigdecimal (1)

In the source resolves to bigdecimal (double) while in 1.5 it resolves to bigdecimal (INT), which is not present in earlier jdks. the-source flag of javac only restricts the constructs in the source using Ge (e.g. assert, generics); it does ** not * restrict or filter the contents of the libraries. therefore, in jdk5 if you compile with "javac-source 1.4" you will still be compiling against the 1.5 version of the libraries. therefore, in cases like the one in this bug, code compiled at a lower language level might not be able to be used with an ealier release supporting that language level.

To match both the language and libraries of an ealier JDK, use-source and the-bootclasspath flag to specify the earlier Rt. jar as well. Of course the ealier JDK cocould be used too.