I have done a rebuild [1] of Java packages using Java 8. About 20 % of
packages currently fail, but mostly for reasons not related directly to
Java 8.
Some of problems I have found:
1) Some collection iterators return elements in different order - most
common problem, which breaks tests in many packages and who knows what
else.
Solution: work with upstream to fix buggy code that relies on order of
elements in unordered collections.
2) Assertion failure jn javadoc - rhbz#1082186
3) Some new methods were added, which breaks existing code. Examples:
java.util.Map - remove(K,V)
java.util.List - sort(Comparator)
java.lang.reflect.TypeVariable - getAnnotatedBounds()
sun.security.jgss.spi.GSSCredentialSpi - impersonate(GSSNameSpi)
Solution: patch code to implement new methods
4) java.lang.reflect.Proxy - fields of proxy classes cannot be accessed
using reflection any longer?
[1] The rebuild was done for testing purposes only. Resulting Builds
are not included in Fedora.
--
Mikolaj Izdebski
Software Engineer, Red Hat
IRC: mizdebsk