OpenJDK rebuilding on windows takes a long time

[Fredrik Öhrström]

2013/2/15 Ioi Lam <ioi.lam at oracle.com>:

> Is there an option in the makefiles to compile ONLY the .java file that's
> changed (assuming I know the changes won't affect other classes)?

Yes, configure with --enable-sjavac.

Then it will recompile exactly the java files you have touched.
And if the public api of the package you changed files in, is changed,
then it will recompile all other packages that import from that package.

Thus add a public method to java/lang/Object.java, type make,
and watch it recompile ~9000 classes.

Change private code in an awt class, and it will recompile only
that package.

Try it! And report how it fares for you!

//Fredrik