java代码如何判断服务是否启动？

public static boolean getProcess() {
  boolean flag = false;
  try {
   Process p = Runtime.getRuntime().exec("cmd /c tasklist ");
   ByteArrayOutputStream baos = new ByteArrayOutputStream();
   InputStream os = p.getInputStream();
   byte b[] = new byte[256];
   while (os.read(b) > 0)
    baos.write(b);
   String s = baos.toString();
   // System.out.println(s);
   if (s.indexOf("smss.exe  ") >= 0) {
    System.out.println("yes ");
    flag = true;
   }
   else {
    System.out.println("no ");
    flag = false;
   }
  } catch (java.io.IOException ioe) {
  }
  return flag;
 }
 
 public static void main(String[] args) {
  if(getProcess()){
   System.out.println("********* ok *********");
  }else{
   System.out.println("********* no *********");
  }
 }