Question

My question is simple. I’m trying to make a set of java.net.URLs that are public static final, so that any class can access them from any context, as these URLs won’t change during runtime. However, when I try to create them, I get a compiler error telling me that I must catch or declare thrown a java.net.MalformedURLException, but that is impossible outside a method. Is there any way to circumvent such a constructor that throws a non-java.lang Throwable?

Some dummy code below to visualize my problem:

public class Main
{
    public static final java.net.URL STATIC_URL = new java.net.URL("http://example.com/");
    public static void main(String[] args)
    {
        GUI gui = new GUI();
        gui.setVisible(true);
    }
}

public class GUI extends java.awt.Window
{
    public GUI()
    {
        add(new java.awt.Label(Main.STATIC_URL.toString()));
    }
}

If you try to compile this, it will tell you that you can’t because of line 3. Hence my question.

Answer 1

An “alternative” which I’d prefer to @HosamAly method:

private static final java.net.URL STATIC_URL = makeUrl("http://www.example.com");

public static java.net.URL makeUrl(String urlString) {
    try {
        return new java.net.URL(urlString);
    } catch (java.net.MalformedURLException e) {
        return null; //Or rethrow an unchecked exception
    }
}