Java Programming

Hi,

i have problem using Runtime.getRuntime() to change working directory and then list it
anyone know how to do it

basically i want 2 things to be done
1. cd c:/exploded-temp
2. dir /w

below is my partial code

	 cmd[0] = "cmd.exe" ;
                 cmd[1] = "/C" ;
                 cmd[2] = "cd C:/exploded-temp";
                     
            
            Runtime rt = Runtime.getRuntime();
                       Process proc = rt.exec(cmd);
            
              
            // any error message?
            StreamGobbler errorGobbler = new      StreamGobbler(proc.getErrorStream(), "ERROR");            
            
            // any output?
            StreamGobbler outputGobbler = new 
                StreamGobbler(proc.getInputStream(), "OUTPUT");
                
            // kick them off
            errorGobbler.start();
            outputGobbler.start();
            
                                              
            // any error???
            int exitVal = proc.waitFor();
            System.out.println("ExitValue: " + exitVal);   
            
            cmd[0] = "cmd.exe" ;
            cmd[1] = "/C" ;
            cmd[2] = "dir /w";
            proc = rt.exec(cmd);
            
 errorGobbler = new      StreamGobbler(proc.getErrorStream(), "ERROR");            
            
            // any output?
             outputGobbler = new 
                StreamGobbler(proc.getInputStream(), "OUTPUT");
                
            // kick them off
            errorGobbler.start();
            outputGobbler.start();

but the code above seems doesnt work
it only list whatever directory i run this java class from

anyone know how to solve it?
thanks