java - could not send message using net send -

i have done following java program using net send.it says message sent successfully, couldn't see message.here code

  import java.io.*;   import java.net.*;   class sample{    public static void main(string args[]) throws exception     {     try{         runtime r=runtime.getruntime();         process p=null;         string msg;         string trip;         string cmd;         bufferedreader br=new bufferedreader(new inputstreamreader(system.in));         system.out.println("enter ip address of remote host");         trip=br.readline();         system.out.println("enter msg sent remote host");         msg=br.readline();         cmd="net send"+trip+""+msg;         p=r.exec(cmd);         thread.sleep(1000);         system.out.println("msg soc sent sysytem");         }catch(exception e){           system.out.println(e);         }       }     } 

you need more spaces in string:

 cmd="net send "+trip+" "+msg; 

otherwise ipaddress (or whatever string given) directly after send in resulting string.