I've done some programming in Java. The only problem with Java is also its strength; it's not fully compiled. This is great because it makes it cross-compatible without the developer having to compile it for every operating system. But this also slows down the execution of Java programs. I'd like to be able to compile them to binary. I found out that there's a compiler called GCJ which can compile Java programs to OS X binary. However, I don't know how to compile it. I found some instructions on the GCJ website, but they weren't very helpful. How do you compile GCJ in OS X?