Thread: Java calculator using swing and applet

import java.io.*;
import java.util.*;
import javax.swing.JOptionPane;

public class exercise1
{

public static void main(String args[]){
String input = JOptionPane.showInputDialog("Selection from the choices below:\n\n 1. Addition\n 2. Subtraction\n 3. Multiplication\n 4. Division\n 5. Modulo\n\n Your choice?");


JOptionPane.showInputDialog("\nEnter first number: ");
float x = kbReader.nextFloat();
JOptionPane.showInputDialog("Enter second number: ");
float y = kbReader.nextFloat();


Scanner kbReader = new Scanner(System.in);
int choice = kbReader.nextInt();


if((choice<=5) && (choice>0))
{

switch (choice)
{

case 1: //addition 1 decimal
System.out.println(x + " plus " + y + " = " + (x + y) );
break;

case 2: //subtraction no decimal
System.out.println(x + " minus " + y + " = " + (x - y) );
break;

case 3: //multiplication 3 decimal
System.out.println(x + " times " + y + " = " + (x * y) );
break;

case 4: //division 4 decimal
System.out.println(x + " divided by " + y + " = " + (x / y) );
break;

case 5: //modulo
System.out.println(x + " modulo " + y + " = " + (x % y) );
//break;
}

}
else
{
System.out.println("Please enter a 1, 2, 3, 4 or 5.");
}
}
}

--- Update ---

please help me solve my code its for my final exam. the code doesn't continue to its input number

Hello.
You are first reading the operation using JOptionpane. So you don't need Scanner anymore.
Just replace the scanner code with this line. It should work.
//Scanner kbReader = new Scanner(System.in);
//int choice = kbReader.nextInt();

int choice=Integer.parseInt(input);

Thats it.

Thanks,
Syed.

Originally Posted by syedbhai

Hello.
You are first reading the operation using JOptionpane. So you don't need Scanner anymore.
Just replace the scanner code with this line. It should work.
//Scanner kbReader = new Scanner(System.in);
//int choice = kbReader.nextInt();

int choice=Integer.parseInt(input);

Thats it.

Thanks,
Syed.

tons of thanks sir. now my problem is how to convert those int to float and displays required decimal places.

Originally Posted by lordrey

tons of thanks sir. now my problem is how to convert those int to float and displays required decimal places.

What did you try?
Your homework is meant for you to figure out, to give you the ability to solve the problem. Not to see how someone on a forum would solve the problem.