Cannot find symbol Canvas

Question

My class Window is the following

package com.tutorial.main;

import java.awt.Canvas;

public class Window extends Canavas {

    public Window(int width, int height, String title, Game game){

        JFrame frame = new JFrame(title);

        frame.setPrefferedSize(new Dimension(width, height));
        frame.setMaximumSize(new Dimension(width, height));
        frame.setMinimumSize(new Dimension(width, height));

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setResizable(false);
        frame.setLocationRelativeTo(null);
        frame.add(game);
        frame.setVisible(true);
        game.start();
    }
}

I've imported the abstract window toolkit's Canvass class, so I can't understand why I receive the following errors:

cannot find symbol Canvas

cannot find symbol JFrame

Note that I am not using an IDE, I am using a text editor.

What about importing JFrame in your code and add the Canvas jar to javac ? — Bruno, May 18 '17 at 18:09
It looks like you made a typo, in your code you have `Canavas` instead of `Canvas`. Also, you need to add `import javax.swing.JFrame;` — Jesper, May 18 '17 at 18:10
@BrunoDM Thanks, that eliminated the no Canvas symbol error. — the_prole, May 18 '17 at 18:13

RobCo · Accepted Answer · 2017-05-18T19:17:32.783

Your problem is related to class importing.
You need to import all the classes that you use. There are just two exceptions to this:

classes in the java.lang package
classes in the same package as the current class

In your snippet the following classes are not imported:

Game and Dimension (presumably these are in the same com.tutorial.main package)
Canvas and JFrame. You misspelled Canvas as Canavas (this is where an IDE, or just a spellchecker, comes in), and did not import JFrame.

So the solution for your problem is:
Fix typo: extends Canvas
Add: import javax.swing.JFrame;

Cannot find symbol Canvas

1 Answers1