Java Calculator (1 error) -

this teachers java calculator program. compiler jcreator , keeps saying 1 error , don't know mistakes , should do. need run , i'm running out of time.

 public class calculator {  static double number1;  static double number2;  static string y;   public static void main(string[] args); {   {    system.out.println("this calculator . . . not sure if expecting cool intro");    system.out.println("");    system.out.println("this possible in head ... ");    system.out.println("");     system.out.println("enter thee first number press enter key");    double number1 = expo.enterdouble();     system.out.println("");    system.out.println("enter second number press enter key ");    double number2 = expo.enterdouble();     system.out.println("");    system.out.println("would add, subtract, multiply, or divide?");    system.out.println("");    string calc = expo.enterstring();    .touppercase();     switch ((calc)) {     case "add":      system.out.println(number1 + " + " + number2 + " = " + calculationsadd(number1, number2));      break;     case "subtract":      system.out.println(number1 + " - " + number2 + " = " + +calculationssubtract(number1, number2));      break;     case "multiply":      system.out.println(number1 + " * " + number2 + " = " + +calculationsmultiply(number1, number2));      break;     case "divide":      system.out.println(number1 + " / " + number2 + " = " + +calculationsdivide(number1, number2));      break;    }     system.out.println("");    system.out.println("do want more ca lculations ... yes or no?");    y = expo.enterstring();    system.out.println("");    } while (y.equals("yes"));  }   public static double calculationsadd(double number1, double number2) {   double add = number1 + number2;   return add;  }   public static double calculationssubtract(double number1, double number2) {   double subtract = number1 - number2;   return subtract;  }   public static double calculationsmultiply(double number1, double number2) {   double multiply = number1 * number2;   return multiply;  }   public static double calculationsdivide(double number1, double number2) {   double divide = number1 / number2;   return divide;  } } 

first of remove ; behind main method:

public static void main(string[] args); 

second one:

.touppercase(); 

what uppercase??? remove or use inside string:

string calc=expo.enterstring().touppercase(); 

third one:

import class expo in case not inside same package...

i dont know ide using common ide's should give information problems. furthermore offers possibility format code ;-)