System (Runtime) execute command for copying the file

Question

Can any one tell me what is wrong with this - it throws an IOException
String sourcepath = "C:"+File.separator+"pbx"+File.separator+"mantra"+File.separator+"vvvvv.mp3";
String destinationpath = "C:"+File.separator+"rrr"+File.separator+"mantra"+File.separator+"mantra.mp3";
Runtime rt=Runtime.getRuntime();
try{
String command="C:"+File.separator+"windows"+File.separator+"command /c copy "+sourcepath+" "+destinationpath;
System.out.println(command);
rt.exec(command);
}catch(IOException ex){System.out.println("exception "+ex); ex.printStackTrace();}
output:-
C:\windows\command /c copy C:\pbx\mantra\vvvvv.mp3 C:\rrr\mantra\mantra.mp3
exception java.io.IOException: CreateProcess: C:\windows\command /c copy C:\pbx\mantra\vvvvv.mp3 C:\
rrr\mantra\mantra.mp3 error=2
java.io.IOException: CreateProcess: C:\windows\command /c copy C:\pbx\mantra\vvvvv.mp3 C:\rrr\mantra
\mantra.mp3 error=2
at java.lang.Win32Process.create(Native Method)
at java.lang.Win32Process.<init>(Win32Process.java:66)
at java.lang.Runtime.execInternal(Native Method)
at java.lang.Runtime.exec(Runtime.java:566)
at java.lang.Runtime.exec(Runtime.java:428)
at java.lang.Runtime.exec(Runtime.java:364)
at java.lang.Runtime.exec(Runtime.java:326)
at Test.main(Test.java:82)

Answer 1

this is clear one...
String sourcepath = "C:"+File.separator+"pbx"+File.separator+"mantra"+File.separator+"vvvvv.mp3";
String destinationpath = "C:"+File.separator+"rrr"+File.separator+"mantra"+File.separator+"mantra.mp3";
Runtime rt=Runtime.getRuntime();
try{
String command="C:"+File.separator+"windows"+File.separator+"cmd /c copy "+sourcepath+" "+destinationpath;
// String command="copy "+sourcepath+" "+destinationpath;
System.out.println(command);
rt.exec(command);
}catch(IOException ex){System.out.println("exception "+ex);
            ex.printStackTrace();}