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Getting error for line of code. What should i Import?
import javax.media.opengl.*;
import java.awt.Color;
import java.awt.Frame;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.media.opengl.GL;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLCanvas;
import javax.media.opengl.GLEventListener;
import java.awt.Canvas;
import javax.swing.JPanel;


public class Forest{//open forest

public static void main(String[] args)
{
    Frame frame = new Frame("Hello World");

20:    GLCanvas canvas = GLDrawableFactory.getFactory().createGLCanvas(new GLCapabilities());
    frame.add(canvas);

    frame.setSize(300, 300);
    frame.setBackground(Color.WHITE);

    frame.addWindowListener(new WindowAdapter()
    {
        public void windowClosing(WindowEvent e)
        {
            System.exit(0);
        }
    });

    frame.show();

}//close forest
}