Trouble copying Image file from JAR directory

[LucienMontierre]

Here's the code I'm using:

 public void copyFile()throws IOException{
    	  File inputFile = new File("Default.png");
    	   File outputFile = new File("copy.png");
    	   FileReader in = new FileReader(inputFile);
    	   FileWriter out = new FileWriter(outputFile);
    	   int c;

    	   while ((c = in.read()) != -1)
    	     out.write(c);

    	   in.close();
    	   out.close();
    }

Unfortunately, it isn't doing what its supposed to. I have an image file called "Default.png" in the directory where the JAR file is. I have another method confirming that it is able to find this file:

java.net.URL imageURL = getClass().getResource("Default.png");
ImageIcon picture = new ImageIcon(imageURL);

The method is supposed to make a copy of the file "Default.png" called "copy.png". The original snippet of code I got the method top method from actually had hard coded filepaths, e.g. "c://documents," but I need my program to be able to simply look for the file in whatever directory the JAR file is in - the default directory. I thought I'd beable to do that the same way I as I did in another method used to read Text files - by simply putting the name of the file. Not sure why this isn't working. Help is much appreciated. Hopefully I've explained the problem well enough.

[JosAH]

Is that image stored in your .jar file? If so, it isn't a file, it is a jar entry; you can get an input stream from that entry by using the getResourceAsStream( ... ) method; don't use Readers, they handle characters (including their encoding) not bytes.

kind regards,

Jos

[LucienMontierre]

Sorry, the file isn't actually in the .jar file, but the directory that the .jar file is in.

[doWhile]

As Tolls pointed out, don't use Reader/Writer. And to drive the point home, see the API
FileWriter (Java Platform SE 6)
And pay special attention to the following line:

FileWriter is meant for writing streams of characters. For writing streams of raw bytes, consider using a FileOutputStream.

A similar statement can be found on the FileReader API page.

[LucienMontierre]

Swell, thanks! Here's the final code:

 public void copyFile(String filenameoriginal, String filenamecopy)throws IOException{
    	   File destFile = new File(filenamecopy);
    	   if (!destFile.exists()) {
    	       destFile.createNewFile();
    	   }

    	   FileChannel fileSource = new FileInputStream(filenameoriginal).getChannel();
    	   FileChannel destination = new FileOutputStream(filenamecopy).getChannel();
    	   destination.transferFrom(fileSource, 0, fileSource.size());

    	   System.out.println("Success.");
    	   if (fileSource != null) {
    	       fileSource.close();
    	   }
    	   if (destination != null) {
    	       destination.close();
    	   }
    }

[Tolls]

As Tolls pointed out, don't use Reader/Writer.

I did?
;)

[doWhile]

I did?
;)

Now that was a full on brain fart...I mean JosAH

[JosAH]

Now that was a full on brain fart...I mean JosAH

I did? ;-) I don't remember anything and I'll deny any accusations! I didn't do nothing! I was asleep! I mean, where am I? Who are you folks? Don't you stare at me that way! Help! I'm being oppressed!

kind regards,

Jos (innocent as always)

[DarrylBurke]

Now that was a full on brain fart...I mean JosAH

Jos? He hasn't posted anything in this thread.

db (exit, stage right)

[JosAH]

Jos? He hasn't posted anything in this thread.

db (exit, stage right)

See? See? I told you so. case closed.

kind regards,

Jos (runs ---------------------------------------------------------> that a'way)