class ST
{
    private String inputString;
    private static String star[];
    private static  int index;
    private static int numtokens;
    private static int start;
    private static int end;



    public ST(String str, String delim)
    {

    star = new String[50];

    String c1; String c2;
    String s;
        numtokens = 0;


    for(int i =0; i<str.length()-1;i++)
    {
        index = 0;


        s = str.substring(i,i+2);
        c1 = s.substring(0,1);
        c2 = s.substring(1);

        //System.out.println("[" + i + "]"  + c1);
        //System.out.println("[" + i + "]" +  c2);

            if(c1 !=(" ") && c2.equals(" "))
            {
                start = i +1;
                star[i] = str.substring(start);
                //System.out.println(" start  = " +  start);
         System.out.println("star[" + i + "] = "+ star[i]);
                 numtokens++;
           }

              if(c1 != (" ") && c2 != (" "))
          {

         end= str.indexOf(' ',start);
         star[i] = str.substring(start, end);
         //j = star[i];
                 //System.out.println("j = " + j);
         System.out.println("star[" + i + "] = "+ star[i]);
         numtokens++;
             }
         if(end>str.length() && start > end)
         {
             star[i] = str.substring(start);
         numtokens++;

                System.out.println("i" + i);



             }

             index =i;

           }
     }

    public static boolean isDelim(String c1, String delim)
    {
        for(int i = 0; i<delim.length()-1;i++)
    {
        if(c1.equals(" "))
         {
          return true;
             }

     }
         return false;
     }


    public ST(String str)
    {
        this(str," ");
    }

    public int countTokens()
    {
        return(numtokens-index);
    }

    public String nextToken()
    {
        return star[index++];
    }

    public boolean hasMoreTokens()
    {
        return(numtokens > index);
    }
 }









public class Lab6
{
    public static void main(String argv[])
    {
        String str;


        str = "Hello world";
        ST stok= new ST(str);

        System.out.println("[" + str + "]");

        while (stok.hasMoreTokens())
        {
            System.out.println("#tokens = " + stok.countTokens());
            System.out.println("token: " + stok.nextToken());
        }
        System.out.println("#tokens = " + stok.countTokens());
        System.out.println("token: " + stok.nextToken());
        System.out.println("\n\n");


        /*str = "    Hello    world   ";
        stok= new StringTokenizer(str);

        System.out.println(str);

        while (stok.hasMoreTokens())
        {
            System.out.println("#tokens = " + stok.countTokens());
            System.out.println("token: " + stok.nextToken());
        }
        System.out.println("#tokens = " + stok.countTokens());
        System.out.println("\n\n");

    //3)
        str = "root:x:0:0:root:/root:/bin/bash";
        stok = new StringTokenizer(str, ":");

        System.out.println(str);


        int n = stok.countTokens();
        System.out.println("#tokens = " + n);

        for (int i=0; i<n; i++)
        {
            System.out.println("token " + stok.nextToken());
        }

        //System.out.println("username = " + stok.nextToken());
        //System.out.println("password = " + stok.nextToken());
        //System.out.println("userid   = " + stok.nextToken());
        //System.out.println("groupid  = " + stok.nextToken());
        //System.out.println("comment  = " + stok.nextToken());
        //System.out.println("home dir = " + stok.nextToken());
        //System.out.println("shell    = " + stok.nextToken());
        //System.out.println("\n\n");

    //4)
        str = "Hello-world.It is!a nice day,today";
        stok= new StringTokenizer(str,"-.!, ");

        System.out.println(str);

        while (stok.hasMoreTokens())
        {
            System.out.println("#tokens = " + stok.countTokens());
            System.out.println("token: " + stok.nextToken());
        }
        System.out.println("#tokens = " + stok.countTokens());*/
    }
}