Topic awaiting preservation: Java question (Page 1 of 1)

Yeah, I know- 'This is for server side stuff, not applications programing'. But I didn't know where else to post this one...

So I'm going thru sun's core Java fundamentals vol 1, trying to evolve from a mere scripter into a programmer, but it seems like my compiler hates me....and keeps spitting out this error message:

/Users/normknowles/java/Image.java:9: incompatible types

found   : java.awt.Image

required: Image

        image=Toolkit.getDefaultToolkit().getImage("me_Icon.gif");

Here is a look at the offending code:

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;



class ImagePanel extends JPanel

{

    public ImagePanel()

    {

        image=Toolkit.getDefaultToolkit().getImage("me_Icon.gif");

        MediaTracker tracker=new MediaTracker(this);

        tracker.addImage(image,0);

        try{tracker.waitForID(0);}

        catch(InterruptedException e){}

    }

    

    public void painComponent(Graphics g)

    {

        super.paintComponent(g);

        Dimension d=getSize;

        

        int clientWidth=d.width;

        int clientHeight=d.Height;

        int imageWidth=image.getWidth(this);

        int imageHeight= image.getHeight(this);

        

        g.drawImage(image,0,0,this);



        for(int i=0; i*imageWidth<=clientWidth;i++)

        {

            for(int j=0;j*imageHeight<=clientHeight;j++)

            {

                if (i+j>0)

                {

                    g.copyArea(0,0,imageWidth,imageHeight,i*imageWidth,j*imageHeight);

                 }

                 

             }  

              

          }

            

            

    }

        private Image image;

}

The image file is in the same directory as the program I'm trying to build, I've double checked the filename.

Where am I screwing up here?

/* Sure, go ahead and code in your fancy IDE. Just remember: it's all fun and games until someone puts an $i out */

I get the program to compile with 3 changes, but I didn't test your code.

I changed lines 19, 22, and 43.

line 19: Dimension d=getSize();
line 22: int clientHeight=d.height;
line 43: private java.awt.Image image;

also, when I compiled your original code, i recieved the following error message, which might clarify things for you...

F:\>javac Image.java

.\Image.java:9: duplicate class: ImagePanel

class ImagePanel extends JPanel

^

Image.java:47: cannot access Image

bad class file: .\Image.java

file does not contain class Image

Please remove or make sure it appears in the correct subdirectory of the classpa

th.

        private Image image;

                ^

2 errors

thanks jdauie, I changed those lines and now it compiles!

Now I just have to figure out why the image doesn't show up on the frame when I invoke frame.show()....but those mistakes are probably in the code I didn't post.


/* Sure, go ahead and code in your fancy IDE. Just remember: it's all fun and games until someone puts an $i out */

Try your original code, but add the following:

import java.awt.image.*;

I suspect that the class java.awt.Image relies on classes in the package java.awt.image, and if java.awt.image.* are not loaded, java.awt.Image won't work either. Don't confuse java.awt.image (the package) with java.awt.Image (the class). This is just a guess, but it's an educated one.

Cell 1250 :: alanmacdougall.com :: Illustrator tips

I added import java.awt.image.* , but still no picture shows up in the frame ( which is a shame because it is a very good picture of me).

this is the rest of my code, I've gone over and over and over this and still can't see what is wrong:

class ImageFrame extends JFrame

    {

        public ImageFrame()

        {

            setTitle("Image Test");

            setSize(300,200);



            addWindowListener(new WindowAdapter()

            {

                public void windowClosing(WindowEvent e)

                {

                    System.exit(0);

                }



            } );



            Container contentPane=getContentPane();

            contentPane.add(new ImagePanel());

            

        }

        

    }

    

    

    public class Image

    {

        public static void main (String [] args)

        {

            JFrame frame=new ImageFrame();

            frame.show();

        }

    }

/* Sure, go ahead and code in your fancy IDE. Just remember: it's all fun and games until someone puts an $i out */

You mispelled a method:

public void paintComponent(Graphics g)

I checked it with an image and it displays it.
[edit] I assume that it displays correctly, perhaps not [/edit]

[This message has been edited by jdauie (edited 01-26-2004).]

My thanks to both of you.

I made my JAR and now when I double-click it, up pops a picture of the best looking bald guy I know....This Java stuff might just turn out to be fun!

/* Sure, go ahead and code in your fancy IDE. Just remember: it's all fun and games until someone puts an $i out */