Thread: JAVA Calculator Problem

Please Help me solve my problem in using switch and also the answer would be output required decimal places. its for my final exam. thanks a lot.

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: ");
	int x = Integer.parseInt(x);
	JOptionPane.showInputDialog("Enter second number: ");
	int y = Integer.parseInt(y);
 
 
	int choice = Integer.parseInt(input);
	if((choice<=5) && (choice>0))
	{
 
	switch (choice)
	{
 
	case 1: //addition 1 decimal place
		JOptionPane.showMessageDialog(null, x + " plus " +  y + " = " + (x + y);
	break;
 
	case 2: //subtraction no decimal place
		JOptionPane.showMessageDialog(x + " minus " + y + " = " + (x - y) );
	break;
 
	case 3: //multiplication 3 decimal place
		JOptionPane.showMessageDialog(x + " times " + y + " = " + (x * y) );
	break;
 
	case 4: //division 4 decimal place
		JOptionPane.showMessageDialog(x + " divided by " + y + " = " + (x / y) );
	break;
 
	case 5: //modulo
		JOptionPane.showMessageDialog(x + " modulo " + y + " = " + (x % y) );
	//break;
	}
 
	}
	else
	{
	System.out.println("Please enter a 1, 2, 3, 4 or 5.");
	}
}
}

Originally Posted by lordrey

Please Help me solve my problem in using switch

What is your problem in using switch?
Does it compile? Is there an error?

If you need help, ask a question besides the implied "give me a working solution"

Hello.
Thats simple.
If you want floating or double values then change the type of the variables x and y respectively. You will have to use the parseXxx() of the corresponding wrapper class.
In simpler words the way you are doing for integers the same way you do for floats/doubles.

Thanks,
Syed.