Trying to set the filedialog file "type" ... but nothing seems to do this...

[blazedaces]

I've taken a look at the class and you only seem to be able to set the file name, but not it's save type.

Why is this?

Here's some code if you want it, but it doesn't seem to have a method for choosing the type of file to save:

    public void save(double[] x, double[] y) {
        FileDialog fd = new FileDialog(new Frame(), "Choose a text file to save to...", FileDialog.SAVE);
        fd.setFile("*.txt");
        fd.setDirectory(".\\bodyFiles");
        fd.setLocation(50, 50);
        fd.setVisible(true);
 
        try {
            out =  new PrintWriter(new FileOutputStream(fd.getDirectory() + System.getProperty("file.separator") + fd.getFile()));
        }
        catch (FileNotFoundException e) {
            System.out.println("File not found exception: ");
            e.printStackTrace();
        }
 
        StringBuffer sb;
        String ws = ",                                   ";
        if (x.length != y.length) {
            System.out.println("Both inputs to save should have the same number of points\nor the length of the arrays should be the same,\nbut they are not for some reason.");
            System.exit(1);
        }
        for (int i = 0; i < x.length; i++) {
            sb = new StringBuffer(60);
            sb.append(i); sb.append(": "); sb.append(y[i]); sb.append(ws);
            out.print(sb.substring(0, 30));
            out.println(x[i]);
        }
        out.close();
    }
 

Anyone does this before, seems like there should be an obvious solution, sorry that I can't find it...

-blazed

Edit: Yes, if I type file'sName.txt for example it will save as type .txt, but not if I don't include the .txt at the end. I want the type to be set as txt and so I can type fileName in and it will save as a fileName.txt

Thanks again for your help and time...

[JosAH]

Does adding an appropriate FileFilter help you out?

kind regards,

Jos

[blazedaces]

Does adding an appropriate FileFilter help you out?

kind regards,

Jos

I believe this is my answer, thank you very much. I just wish it was more simple...

Filefilter is an interface, so I have to make a class that extends it and then custom-make my own accept parameters...

Wish there was a way to just have a default fileFilter of filenameFilter (don't know the difference really) that I could say new fileFilter(".ex tension");

Note: I realize it's probably very easy to create this class yourself. I will, but I'm in a rush to finish a project with this today, so I'll get back to it.

Again, thank you very much Jos for your help...

-blazed

[JosAH]

I believe this is my answer, thank you very much. I just wish it was more simple...

Filefilter is an interface, so I have to make a class that extends it and then custom-make my own accept parameters...

Wish there was a way to just have a default fileFilter of filenameFilter (don't know the difference really) that I could say new fileFilter(".ex tension");

Note: I realize it's probably very easy to create this class yourself. I will, but I'm in a rush to finish a project with this today, so I'll get back to it.

Again, thank you very much Jos for your help...

-blazed

You're welcome of course. Sun didn't pay attention when they designed their
FileFilter, i.e. they indeed forgot that there already existed a FileNameFilter.
Both do the same thing and indeed the implementations of such a Filter are
easy to build; in your accept method just do this:

return file.getCanonicalPath().endsWith(extension);
 

... that's all there is to it.

kind regards,

Jos