Calculate Bill Calculation Program Using Java

                /*CLOTH PURCHASE*/
import java.io.*;
import java.lang.*;

class ssva11
{
   public static void main(String args[]) throws IOException
    {
         double netamt = 0;
         double amt=0,dis=0;
         int tag=0;
         int x;
         String type="";

         do
         {
            BufferedReader obj = new BufferedReader(new InputStreamReader(System.in));

            System.out.println("\tCLOTH PURCHASE\n");
            System.out.print("\nENTER THE CLOTH PURCHASE AMOUNT : ");
            amt = Integer.parseInt(obj.readLine());
            System.out.print("\nENTER THE TYPE(m/h) : ");
            type = obj.readLine();
            if(type.equals("m"))
            tag = 0;
            else
            tag = 1;
            switch(tag)
            {
            case 0:
                   {
                       System.out.print("\nTHE SELECTED CLOTH IS MILL CLOTH ");
                       if(amt >100 && amt <201)
                        netamt = (amt - (amt/100.)* 5);
                        if(amt >200 && amt <301)
                         netamt = (amt - (amt/100.)*7.5);
                        if(amt > 300)
                         netamt = (amt - (amt/100.)*10);
                         break;
                    }
            case 1:
                    {
                       System.out.print("\nTHE SELECTED CLOTH IS HANDLOOM CLOTH ");
                        if(amt >100 && amt <201)
                         netamt = (amt - (amt/100.0)*7.5);
                        if(amt >200 && amt <301)
                         netamt = (amt - (amt/100.0)*10);
                        if(amt > 300)
                         netamt = (amt - (amt/100.0)*15);
                         break;
                    }
             }
             System.out.print("\n\nNET AMOUNT IS : "+netamt);
             System.out.print("\n\nDO YOU WANT TO CONTINUE[1/0] :");
             x=Integer.parseInt(obj.readLine());
         }
         while(x==1);
     }
}