trouble with ProcessBuilder

Question

// following code works fine n open notepad... 
class demo
{
public static void main(String args[])
{
 try{
 ProcessBuilder pb=new ProcessBuilder("notepad");
 pb.start();
 }catch(Exception e)
 {System.out.print(e);}
}
}
 //however the above code throws an exception when any other system program is executed
class demo
{
public static void main(String args[])
{
 try{
 ProcessBuilder pb=new ProcessBuilder("calculator");
 pb.start();
 }catch(Exception e)
 {System.out.print(e);}
}
}

the above program throws following exception:

java.io.IOException: Cannot run program "Calculator": CreateProcess error=2, The system cannot find the file specified

Answer 1

You should include the full path to the executable (including the directories and the .exe extension).

Should actually be apparent from the error message you got :-)

(The reason "notepad" worked indicates that it will search %PATH% and try to append .exe if necessary. This leads me to believe that "calc" may also work :-)