This try and catch(Exception e) is only catching the exception

Question

Main Class:

public class Table extends java.applet.Applet implements Runnable
{
     public void init()
     {
         try
         {
             Balla.addBall();
         }
         catch(Exception e)
         {
         }
     }
}

Method:

 public class Balla
 {
    public static int balls=0;
    public static void addBall()throws IOException
    {
    Random generator = new Random();
    Ball b = new Ball(100,100,8,Color.blue,generator.nextInt(4)+1,generator.nextInt(4)+1);
        FileWriter fw = new FileWriter("C:\\temp_Jon\\BallData.ballz",true);
        PrintWriter pw = new PrintWriter(fw,true);
        pw.print(b.getX()+" "+b.getY()+" "+b.getRadius()+" "+b.color+" "+b.speedX+" "+b.speedY+"\n");
        System.out.println("qqq");
        pw.close();
        fw.close();
    balls++;
    }
 }

It never actually does what I want it to do and I used the try and catch in the first place because I could not apply throws IOException to the init method.

Please tag with the programming language you're using, instead of useless random keywords like "file" and "throws". — Wooble, May 11 '14 at 04:53
"It never actually does what I want it to do" - and what exactly are you trying to do ? — Nir Alfasi, May 11 '14 at 04:54
This is java and I would like it to write/create the file in which I have selected. — JWPM77, May 11 '14 at 04:56
Try adding `e.printStackTrace();` in your catch block and you should be able to see where the error is more easily. — josaphatv, May 11 '14 at 05:20
Oh it's applet,Sandboxing problem because applets cannot read or write files on the file system. — akash, May 11 '14 at 05:38
[Try This Answer](http://stackoverflow.com/questions/7406871/is-it-possible-to-read-write-a-file-from-an-applet) — akash, May 11 '14 at 05:42

score 0 · Answer 1 · edited May 23 '17 at 10:33

0

Or in other words it is not calling the method addBall()

I do not see where you have instantiated Balla. Are you getting a NullPointerException ?

Also, your Exception block is empty. Add an e.printStackTrace() there and post the stack trace. That'll give u a clue as to what is going wrong.

This seems like a sandboxed applet and hence cannot write to a file. Quoting from the docs:

They cannot access client resources such as the local filesystem, executable files, system clipboard, and printers.

Sources:
1. What Applets Can and Cannot Do
2. How can an applet Read/Write files on the local file-system?

edited May 23 '17 at 10:33

Community

1
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answered May 11 '14 at 05:15

An SO User

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Balla is static and doesn't need an object – JWPM77 May 11 '14 at 05:22
@JWPM77 addBall is static Balla need to be class where this method is declared. – akash May 11 '14 at 05:23
1

@TAsk I agree with u! – An SO User May 11 '14 at 05:28
That is what I meant but yes I have it in the class Balla let me fix that on the question. – JWPM77 May 11 '14 at 05:29

This try and catch(Exception e) is only catching the exception

1 Answers1