Java から複数の CMD コマンドを実行するにはどうすればよいですか?

String[] command = {"cmd"};
Process p = Runtime.getRuntime().exec(command);

// Thread to handle error stream
new Thread(new SyncPipe(p.getErrorStream(), System.err)).start();

// Thread to handle input stream
new Thread(new SyncPipe(p.getInputStream(), System.out)).start();

// PrintWriter to write to the output stream
PrintWriter stdin = new PrintWriter(p.getOutputStream());

// Write the "dir" command
stdin.println("dir c:\ /A /Q");

// Close the stdin stream
stdin.close();

// Wait for the process to complete
int returnCode = p.waitFor();

// Print the return code
System.out.println("Return code = " + returnCode);