When you first download and install the MinGW Java compiler (gcc-java), you may find that when you try to compile a Java program with gcj, you get an error saying "cannot find -liconv". This is because gcj automatically attempts to link your program with libiconv, which is not distributed with MinGW and must be downloaded and installed separately. To get your Java program to compile, download libiconv from http://gnuwin32.sourceforge.net/packages/libiconv.htm. You want "Binaries" and "Developer files". Unzip both downloaded files to your MinGW directory.