if (GlobalConfiguration.jarsToWatch != null) {
    // 1.3 feature, can watch jars!
    String urlstring = url.toString();
    // example path: jar:file:/var/folders/cn/p3n4rh_n6z7gm6zwk53mtfc80000gp/T/_sl308369570226517394/foo.jar!/Foo.class
    int bangSlash = urlstring.lastIndexOf("!/");
    if (bangSlash != -1) {
        String pathInJar = urlstring.substring(bangSlash + 2);
        String remainingPrefix = urlstring.substring(0, bangSlash);
        int lastSlash = remainingPrefix.lastIndexOf(File.separator);
        String jarname = remainingPrefix.substring(lastSlash + 1);
        for (String jarToWatch : GlobalConfiguration.jarsToWatch) {
            if (jarname.equals(jarToWatch)) {
                reloadable = true;
                jarEntry = true;
            }
        }
    }
}

int lastSlash = remainingPrefix.lastIndexOf(File.separator);