Missing throws declaration.

[JojOatXGME]

Some methods throws throwables (like excaptions) or call other methods which throws throwables. This methods have to catch them or must have a "throws-declaration".

For example

public void test() {
    throw new Exception();
}

is not a valid method but the decompiler produce methods like that. I think the method should look like this:

public void test() throws Exception {
    throw new Exception();
}

[Storyyeller]

Unfortunately, this is a limitation of the Java language that is not shared by bytecode, so in general, it is not possible to make the decompiled source follow this.

[JojOatXGME]

Yes but it make the produced sources incompilable. If the decompiler checks whether there is a possible unhandled throwable, it would be very helpful.

I don't know how your decompiler works but I think If there would be a (not too difficult) way to implement that, you should think about that. If you don't have enough information to decide it yet, I understand that you don't want to parse the sources or bytecode again only to get this information.

(My english is not very well and I hope you can read it without problems. The comment should not attack you. I just wanted to say my opinion. If you as a developer have a different opinion, I accept it also.)

[Storyyeller]

No decompiler in existence will always produce recompileable code, even for unobfuscated Java. That being said, Procyon tends to do a pretty good job if that's your goal.

The primary goal of Krakatau is to assist reverse engineering of obfuscated Java, so recompilation is not a major concern.