[Okta Webinar] Learn how to a build a cloud-first strategyRegister Now

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 916
  • Last Modified:

Desktop File operations not working

The code below does nothing. No file opened, no exception thrown.
What can I do to discover the problem?
It does execute the desktop.open(file) line.
Using JDK 1.16.0_81
Running Win XP
I'm running this from the Eclipse IDE.

Running the demo here:
http://java.sun.com/developer/technicalArticles/J2SE/Desktop/javase6/desktop_api/
the browse and mail functionality works, but not the file functionality, again same result, just nothing.

package desktopdemo;

import java.awt.Desktop;
import java.io.File;
import java.io.IOException;

public class MyDesktopDemo {

	public MyDesktopDemo() {

		// have tried .txt, .rtf, .pptx all with no effect
		String pathAndFileString = "C:\\my.pptx";
		File file = new File(pathAndFileString);
		if (Desktop.isDesktopSupported()) {
			Desktop desktop = Desktop.getDesktop();
			if (desktop.isSupported(Desktop.Action.OPEN )) {
				try {
					System.out.println("desktop.open(" + pathAndFileString + ")"); // gets here
					desktop.open(file); // but nothing happens
				} catch (IOException e1) {
					e1.printStackTrace();
				}
			}
			else {
				System.out.println("Desktop.Action.OPEN not supported");
			}
		}
		else {
			System.out.println("Desktop not supported");
		}

	}

    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new MyDesktopDemo();
            }
        });
    }
    
}

Open in new window


0
allelopath
Asked:
allelopath
  • 9
  • 9
  • 8
  • +1
3 Solutions
 
VanNamCommented:
Hi Allelopath,

I've tested it with C:\\my.txt file, it opened file my.txt properly without any error. Have you got the right file that you want to open on your computer?

BR,
VanNam
0
 
allelopathAuthor Commented:
The file is definitely there. If I change the name to a non-existent file, eg. "myZZZ.pptx", then it throws an exception. I've also tried files with various extensions, like txt, pdf, rtf, with no difference.
0
 
CEHJCommented:
Are you certain no exception is thrown?
0
Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

 
CEHJCommented:
If the answer to that is yes, you might like to try jdic: it does much the same thing, and i'd guess (i have to guess since there's probably no native source for  what you're currently using.

Looking at it and running it could give you some clues

https://jdic.dev.java.net
0
 
objectsCommented:
does the file open ok if you double click on it?
0
 
allelopathAuthor Commented:
>>does the file open ok if you double click on it?
yes
0
 
objectsCommented:
>             String pathAndFileString = "C:\\my.pptx";

does it still fail if you change that to:


            String pathAndFileString = "/my.pptx";
0
 
CEHJCommented:
Can you run your code from the command line (i.e. not in Eclipse) and tell us what you get?
0
 
VanNamCommented:

Hi Allelopath,

When I change the file extension to 'abc', and got the error on the console windows:

Failed to open file:/C:/my.abc. Error message: No application is associated with the specified file for this operation.


And change the file to 'my.txt'. It's open ok, with the msg on the console windows:

desktop.open(C:\my.txt)


Maybe there's no application that is associated to your file?
0
 
CEHJCommented:
>>Maybe there's no application that is associated to your file?

There is, or it wouldn't open on double-click
0
 
objectsCommented:
May well be a bug, there are a few Desktop on XP bugs in the db
0
 
allelopathAuthor Commented:
objects:
/my.pptx makes no differences. good idea though.
0
 
objectsCommented:
what service pack?
0
 
CEHJCommented:
What happened outside Eclipse ?
0
 
objectsCommented:
eclipse (or not) won't make a difference
0
 
CEHJCommented:
It could well make a difference to perceived errors
0
 
objectsCommented:
so please enlighten us with why?
0
 
allelopathAuthor Commented:
Microsoft Windows
Version 5.1 (Build 2600.xpsp_sp3_gdr100427-1636: Service Pack 3)
0
 
allelopathAuthor Commented:
CEHJ:
To assure there were no exceptions being missing, I added code to catch any exception:

package desktopdemo;

import java.awt.Desktop;
import java.io.File;
import java.io.IOException;

public class MyDesktopDemo {

	public MyDesktopDemo() {

		// have tried .txt, .rtf, .pptx all with no effect
		String pathAndFileString = "/my.txt";
		File file = new File(pathAndFileString);
		if (Desktop.isDesktopSupported()) {
			Desktop desktop = Desktop.getDesktop();
			if (desktop.isSupported(Desktop.Action.OPEN )) {
				try {
					System.out.println("desktop.open(" + pathAndFileString + ")"); // gets here
					desktop.open(file); // but nothing happens
				} catch (IOException e1) {
					e1.printStackTrace();
				} catch (Exception e1) {
					e1.printStackTrace();
				}			}
			else {
				System.out.println("Desktop.Action.OPEN not supported");
			}
		}
		else {
			System.out.println("Desktop not supported");
		}

	}

	public static void main(String args[]) {
		java.awt.EventQueue.invokeLater(new Runnable() {
			public void run() {
				new MyDesktopDemo();
			}
		});
	}

}

Open in new window

0
 
objectsCommented:
> To assure there were no exceptions being missing

you're original code wouldn't miss any exceptions
still waiting on him to explain why he thinks it would
0
 
allelopathAuthor Commented:
I jar'd the class and ran it, with no difference (from running in Eclipse)
0
 
CEHJCommented:
OK - worth a try
0
 
CEHJCommented:
If you were on Unix you could use strace. You might try this for Windows

http://www.intellectualheaven.com/default.asp?BH=projects&H=strace.htm

(or some alternative)
0
 
CEHJCommented:
Have you tried simply upgrading (or marginally downgrading) the runtime?
0
 
allelopathAuthor Commented:
Currently using JRE 1.6.0_18, dont' want to go any further than _20 because of this:
http://it.slashdot.org/story/10/07/28/2121259/Oracles-Java-Company-Change-Breaks-Eclipse
but I could try _20.

0
 
objectsCommented:
most likely its a bug, lots of Desktop bugs on XP
0
 
VanNamCommented:

You can try it on the another computer with windows xp (maybe virtual machine)
0

Featured Post

[Webinar] Cloud and Mobile-First Strategy

Maybe you’ve fully adopted the cloud since the beginning. Or maybe you started with on-prem resources but are pursuing a “cloud and mobile first” strategy. Getting to that end state has its challenges. Discover how to build out a 100% cloud and mobile IT strategy in this webinar.

  • 9
  • 9
  • 8
  • +1
Tackle projects and never again get stuck behind a technical roadblock.
Join Now