Question

When I ran this program:

import javax.swing.*;
import java.awt.*;

public class DrawApplet extends JApplet{

    public void init () {

        Container content_pane = getContentPane ();
        // Create an instance of DrawingPanel
        int x=1000, y=1000;

        content_pane.setSize(x, y);

        // And add the DrawingPanel to the content pane.
        main_panel drawing_panel = new main_panel(x,y);
        content_pane.add(drawing_panel);
    }
}

it showed an error:

DrawApplet.java:16: error: cannot find symbol
main_panel drawing_panel = new main_panel(x,y);
     ^
symbol:   class main_panel
location: class DrawApplet
DrawApplet.java:16: error: cannot find symbol
main_panel drawing_panel = new main_panel(x,y);
                                    ^
symbol:   class main_panel
location: class DrawApplet
2 errors

Answer 1

Is my a class you created? If so, it doesn’t follow typical naming standards – as classes should begin with a capital letter. Is it on the classpath?

Furthermore, your error doesn’t match the code you’ve posted (my vs. main_panel). Make sure your files and your build are up-to-date.