Re: Q: easiest possible file select dialog

From:

RedGrittyBrick <RedGrittyBrick@SpamWeary.foo>

Newsgroups:

comp.lang.java.help

Date:

Tue, 12 Jun 2007 23:19:35 +0100

Message-ID:

<o6ednf_w3KtshvLbRVnyjwA@bt.com>

Malcolm Dew-Jones wrote:

Hello

I have some command line java utilities running on windows NT/XP/etc and I
would like them to pop up a file select dialog box if no file is entered
as a parameter.

I have seen an example using JFileChooser but even though this says it
takes just two lines, in fact it appears to assume you already have a gui
app (awt, swing ?) and the examples have a whole bunch of code before they
gets to the part where you get to pop up the dialog to ask for a filename.

Is there more trivial way to popup a file select dialog from a java
command line program on Windows?

Something that pops up a dialog is, by definition, not a command line app.

public class ChooseApp {
     public static void main(String[] args) {
         String filename;
         if (args.length > 0)
             filename = args[0];
         else {
             JFileChooser fc = new JFileChooser();
             int returnVal = fc.showOpenDialog(null);
             if (returnVal == JFileChooser.APPROVE_OPTION) {
                 filename = fc.getSelectedFile().getName();
             } else {
                 System.out.println("Cancelled.");
        System.exit(1);
             }
         }
         System.out.printf("You chose file '%s'\n", filename);
     }
}

Whether this sort of thing is sensible or safe I have little idea.