Question

public class SupplierCalculatorApplet extends JApplet{
...
public void init(){
    loadProperties();
    ...
}   

...

private void loadProperties() {
    language = "en-us";//getParameter("Language");
    prop = new Properties();
            try {
                URL urlToProps = this.getClass().getResource("config/" + language + ".properties");
                prop.load(urlToProps.openStream());//Exception Caught Here
            } catch (IOException e) {
            }   
}

Exception is found at the line indicated above. Whether language is a valid properties file or not, I catch the same exception on the same line.

Answer 1

Change to:

prop.load(this.getClass().getResourceAsStream("/config/" + language + ".properties"));