1  import java.util.Scanner;

  2  

  3  /**

  4     This program calculates the value of an expression 

  5     consisting of numbers, arithmetic operators, and parentheses.

  6  */

  7  public class ExpressionCalculator

  8  {

  9     public static void main(String[] args)

 10     {

 11        Scanner in = new Scanner(System.in);

 12        System.out.print("Enter an expression: ");

 13        String input = in.nextLine();

 14        Evaluator e = new Evaluator(input);

 15        int value = e.getExpressionValue();

 16        System.out.println(input + "=" + value);

 17     }

 18  }