How do I open an image in the default image viewer using Java on Windows? -

i have button view image attached log entry , when user clicks button want open image in user's default image viewer on windows machine?

how know viewer in default image viewer?

right i'm doing doesn't work:

string filename = "\""+(string)attachmentscombobox.getselecteditem()+"\""; runtime.getruntime().exec("rundll32.exe c:\\windows\\system32\\shimgvw.dll,imageview_fullscreen "+filename); 

and doesn't work mean doesn't anything. tried run command in command line , nothing happened. no error, nothing.

try cmd /c start

public class test2 {   public static void main(string[] args) throws exception {     string filename = "c:\\temp\\test.bmp";     string [] commands = {         "cmd.exe" , "/c", "start" , "\"dummytitle\"", "\"" + filename + "\""     };     process p = runtime.getruntime().exec(commands);     p.waitfor();     system.out.println("done.");  } } 

this start default photo viewer associated file extension.

a better way use java.awt.desktop.

import java.awt.desktop; import java.io.file;  public class test2 {   public static void main(string[] args) throws exception {     file f = new file("c:\\temp\\test.bmp");     desktop dt = desktop.getdesktop();     dt.open(f);     system.out.println("done.");  } } 

see launch application associated file extension