import javax.swing.JOptionPane;  // import class JOptionPane

public class Addition {

   public static void main( String args[] )

   {

      String firstNumber,   // first string entered by user

             secondNumber; // second string entered by user

      int number1,          // first number to add

          number2,          // second number to add

          sum,  // sum of number1 and number2

          mul ,sub,div;

      // read in first number from user as a string

      firstNumber =

         JOptionPane.showInputDialog( "Enter first integer" );

      // read in second number from user as a string

      secondNumber =

         JOptionPane.showInputDialog( "Enter second integer" );

      // convert numbers from type String to type int

      number1 = Integer.parseInt( firstNumber );

      number2 = Integer.parseInt( secondNumber );

      // add the numbers

      sum = number1 + number2;

      mul = number1*number2;

      sub = number1-number2;

      div = number1/number2;

      String a;

       a=JOptionPane.showInputDialog("please choose formula mode  sum  sub  mul  div");

      // display the results

       if(a.equals("+"))

      JOptionPane.showMessageDialog(

         null, "The sum is " + sum, "Results",

         JOptionPane.PLAIN_MESSAGE );

       if(a.equals("-"))

    	   JOptionPane.showMessageDialog(

    		         null, "The sum is " + sub, "Results",

    		         JOptionPane.PLAIN_MESSAGE );

       if(a.equals("*"))

    	   JOptionPane.showMessageDialog(

    		         null, "The sum is " + mul, "Results",

    		         JOptionPane.PLAIN_MESSAGE );

       if(a.equals("/"))

    	   JOptionPane.showMessageDialog(

    		         null, "The sum is " + div, "Results",

    		         JOptionPane.PLAIN_MESSAGE );

        System.exit( 0 );   // terminate the program

   }

}