File file = new File(classname);
classname = file.getName();
classname = classname.substring(0, classname.length() - 4);
Interpreter i = new Interpreter(); // Construct an interpreter
BshClassManager bsh = i.getClassManager();
if (!bsh.classExists(classname)) {
i.source(url.getFile());
}
ti = bsh.classForName(classname);
} catch (IOException ex) {
System.err.println("File missing:" + ex);