Calender

hello, I am following this tutorial on how to make a calander on a single month in java.
I can't get anything to appear in the grey box when I run it.
Can you tell me where I am going wrong?
thanks
here is my code:

Code:

---

import java.awt.*;

import javax.swing.*;

class cal extends JFrame {
        JPanel months_1;
        JPanel title;
        Container everything;
        public String[] days;

        public cal() {
                title = new JPanel();
                days = new String[] { "monday", "tuesday", "wednesday", "thursday",
                                "friday", "saturday", "sunday" };

                title.add(new JLabel("month of hahaha"));
                everything = getContentPane();
                everything.setLayout(new FlowLayout());
                months_1 = new JPanel();
                months_1.setLayout(new GridLayout(7, 111));

                for (int i = 0; i < 7; i++) {
                        months_1.add(new JLabel(days[i]));
                }

                for (int i = 0; i < 30; i++) {
                        months_1.add(new JLabel(Integer.toString(i)));
                }

                everything.add(title);
                everything.add(months_1);

                setContentPane(everything);

        }
}

---

You'll probably want to provide an SSCCE and use standard naming conventions (for example, classes start with an upper-case letter, variables and methods with a lower-case letter).

Unless you have another file, you are missing your "main" code :
public static void main(String[] args) { ...... }

otherwise, set your cal() object that you create in your main to visible.
Checkout the JComponent document:
JComponent (Java Platform SE 6))

Your code worked for me... there are just a couple of layout issues when I ran it. :)

He said he's getting a gray box, so I doubt it's something as simple as a missing setVisible(). He might be setting the wrong JFrame to visible, but an SSCCE would clear it all up.

I got it working.
It was because I didn't the main method.
Stupid mistake.
thanks all