java - Trouble with my Restaurant Billing program codes and calculating -


i need regarding computation of user order seems options doesn't have value computed please me how put values in every options , 1 more thing need codes checkbox additional order i'm not in programming , effort can do. need pass project right need quick answer , way problem display user?

help with: checkbox codes,computation,joptionpane display

package project2; import java.util.arraylist; import java.util.list; import javax.swing.joptionpane; public class project2 { public static void main(string[] args) { list<string> optionlist = new arraylist<string>(); optionlist.add("1"); optionlist.add("2"); optionlist.add("3"); optionlist.add("4");       double charge;     double tax = 0.0675;     double tiprate = 0.15;     double totalwithtax;     double taxamount;     double tipamount;     double grandtotal;              //selection of food             object[] options = optionlist.toarray();             int value = joptionpane.showoptiondialog(             null,             "please select burger:(1 or 2)\n 1. burger                     $3.00 \n 2. cheese burger      $4.50 "                     + "\n 2. bacon burger        $5.50 \n 2. supreme burger   $7.00",             "pick",             joptionpane.yes_no_option,             joptionpane.question_message,             null,             options,             optionlist.get(0));        //calculate charge , tip     taxamount = charge * tax;     totalwithtax = charge + taxamount;     tipamount = totalwithtax * tiprate;     grandtotal = totalwithtax + tipamount;                //display user             string opt = optionlist.get(value);             joptionpane.showmessagedialog(null,"you picked " + opt"  \n  meal: $" + charge" \n tax: $" + taxamount" \n  meal + tax: $" + totalwithtax" \n  total cost(tip included): $" + grandtotal);     }

}

stepping on compiler issues of example.

you need way map options prices, example...

map<string, double> pricelist = new hashmap<>(4); pricelist.put("1", 3d); pricelist.put("2", 4.5d); pricelist.put("3", 5.5d); pricelist.put("4", 7d);

then, once user has made there choice, can price selected option using like...

double price = pricelist.get(optionlist.get(value));

the problem display comes down number of issues. apart fact it's possible there might variable width font in use, not columns equal length.

a neat trick use html table display value, example


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