How to invoke the command interpreter to run the "NS.exe" using Runtime?

Question

hi,everyone
I need to invoke the command interpreter,and enter the disk directory "c:/ns2/bin/",then run the "ns myfilename" command.My program is followed:
try{
String s[]=new String[4];
s[0]="cmd.exe";
s[1]="/c";
s[2]="cd c:/ns2/bin";
s[3]="ns.exe c:/ns2/bin/100n-500k-5.tcl";
Runtime R=Runtime.getRuntime();
Process p=R.exec(s);
int exitVal = p.waitFor();
System.out.println("Process exitValue: " + exitVal);
But this doesn't work!
please help me! thanks!

Answer 1

hi,everyone
I need to invoke the command interpreter,and
and enter the disk directory "c:/ns2/bin/",then run
the "ns myfilename" command.My program is followed:
try{
String s[]=new String[4];
s[0]="cmd.exe";
s[1]="/c";
s[2]="cd c:/ns2/bin";
s[3]="ns.exe c:/ns2/bin/100n-500k-5.tcl";
Runtime R=Runtime.getRuntime();
Process p=R.exec(s);
int exitVal = p.waitFor();
System.out.println("Process exitValue: " +
alue: " + exitVal);
But this doesn't work!
please help me! thanks!CDing will not change the directory.
should write:
String cmd= "cmd /c c:\\ns2\\bin\\ns.exe c\\ns2\\bin\\100n-500k-5.tcl"
for further details on how to use Runtime.exec(), see http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html