use of Runtime.getRuntime().exec

[jaspreet manchinda]

what does Runtime.getRuntime().exec() means and what it is used for
i read it some where that it is used to open different executable files using java
by using this command can i open drives or non-executable files if not then how can i open it ??

[Tim Moores]

Start by reading this article.

Also check out the java.lang.ProcessBuilder class, which is the more modern variant of Runtime.exec.

[jaspreet manchinda]

thank you Tim for your reply but how can i open different drives and different files and folder in that drive for example i got some music file of any other file or folder in that drive how can i make it act like it acts on double click by mouse please help...

[Tim Moores]

Check out the java.awt.Desktop class.

[jaspreet manchinda]

thats really cool but when I try to open a media file its giving

java.io.IOException: Failed to open file:/E:/MUZIC/INGLISH/01%20lose%20yourself%
20-%20no%20skips%20-%20guaran.mp3. Error message: Unspecified error

at sun.awt.windows.WDesktopPeer.ShellExecute(Unknown Source)
at sun.awt.windows.WDesktopPeer.open(Unknown Source)
at java.awt.Desktop.open(Unknown Source)
at RuntimeExec.main(RuntimeExec.java:17)

[Winston Gutkowski]

jaspreet manchinda wrote:thats really cool but when I try to open a media file its giving
java.io.IOException: Failed to open file:/E:/MUZIC/INGLISH/01%20lose%20yourself%
20-%20no%20skips%20-%20guaran.mp3. Error message: Unspecified error

Do you actually have a file with that name? Looks like a URL specifier to me.

Winston

[jaspreet manchinda]

that is url of that media file that i tried to open

[Jeff Verdegan]

jaspreet manchinda wrote:that is url of that media file that i tried to open

URL != file.

Did you look at the docs for that method? Do they say anything about taking a URL for a parameter?

[jaspreet manchinda]

i mean address of th file i tried to open

[Campbell Ritchie]

Too difficult for “beginning”. Moving discussion.

[jaspreet manchinda]

alright sir

[jaspreet manchinda]

but m still not getting how to open the drives and different media or different format of file

[Tim Moores]

Did you understand what Jeff said? Did you read the javadocs for that method and understand those?

[jaspreet manchinda]

ye Tim i did

[jaspreet manchinda]

This will give you an idea

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

public class RuntimeExec
{
			
 
public static void main(String[] args)
	{
		
		
		try
  		{
			
			File f = new File("E:\\MUZIC\\Eminem - Recovery 2010\\Eminem-Recovery-2010\\3. On Fire.mp3");
			if (f.exists()) 
			{
			if (Desktop.isDesktopSupported()) 
				{
				Desktop.getDesktop().open(f);
				} 
				
				else 
				{
					System.out.println("File is not exists!");
				}
 
				System.out.println("Done");
  			
			}
		}
		catch (IOException e)
  		{
 		e.printStackTrace();
  		}
  	}
}

java.io.IOException: Failed to open file:/E:/MUZIC/Eminem%20-%20Recovery%202010/
Eminem-Recovery-2010/3.%20On%20Fire.mp3. Error message: Unspecified error

at sun.awt.windows.WDesktopPeer.ShellExecute(Unknown Source)
at sun.awt.windows.WDesktopPeer.open(Unknown Source)
at java.awt.Desktop.open(Unknown Source)
at RuntimeExec.main(RuntimeExec.java:21)