It sounds like the build is failing because the character encoding of the Java code you downloaded contains non-ASCII characters ... and you have ASCII as the default characterset for your system(s):
Examine the file(s) in question to try to identify the non-ASCII characters, then:
change your default characterset to UTF-8 (or whatever) to match the file encoding, OR
convert the offending files to ASCII using the
native2ascii
tool that comes as part of a standard JDK distribution.
This file "corbar/src/share/classes/javax/transaction/.TransactionRequiredException.java" looks like binary file and I am not sure why it has the prefix ".". Anybody had this issue before? How can I fix it?
Did you try renaming it to get rid of the leading "."?