Thread: I dont see why this program is not doing what it is supposed to

This program is supposed to request you to enter a number... Then requires you to confirm the same number but only this time without the last digit.

Like for example: You enter number, e.g. 1234567... then it asks you to verify the number (but this time you only enter the first 6 digits of the same number) e.g. 123456.
Then it will take the last digit of the first entry and put it together with at the end of the second entry so it can give you the full 7 digit number, i.e. 1234567.
If the numbers match it will tell you the ticket is valid.. if not it will tell you the ticket is invalid:

import javax.swing.JOptionPane;
import javax.swing.JFrame;
 
public class Validation
{
public static void main(String[] args) throws Exception
{
//Declaration of strings
String inputOne;
String inputTwo;
 
//Declaration of long numbers
int ticket;
int confirm;
 
//Declaration of integers
 
 
inputOne=JOptionPane.showInputDialog("Please enter the 
 
ticket number: ");
inputTwo=JOptionPane.showInputDialog("Please confirm the 
 
ticket number: ");
 
ticket=Integer.parseInt(inputOne);
confirm=Integer.parseInt(inputTwo);
int remainder = ticket%10;
if ((confirm + remainder)==ticket)
{
JOptionPane.showMessageDialog(null, "The ticket number you 
 
just entered is valid", "Ticket Validator", 
 
JOptionPane.INFORMATION_MESSAGE);
}
else
{
JOptionPane.showMessageDialog(null, "The ticket number you 
 
just entered is invalid", "Ticket Validator", 
 
JOptionPane.INFORMATION_MESSAGE);
}
{
System.exit(0);
}
}
}

Awesome.. thanks.. i tried highlighting every word individually.. but this should work

if ((confirm + remainder)==ticket)

Of course this doesn't work. If first number is 12345 and second number is 1234 then 1234 + 5 = 1239 not 12345. It is much easier if you divide the first number by 10 and compare to second number.

I edited the code and this is what I have:

import javax.swing.JOptionPane;
import javax.swing.JFrame;
 
public class Validation
{
public static void main(String[] args) throws Exception
{
//Declaration of strings
String inputOne;
String inputTwo;
 
//Declaration of integers
int ticket;
int confirm;
 
inputOne=JOptionPane.showInputDialog("Please enter the ticket number: ");
inputTwo=JOptionPane.showInputDialog("Please confirm the ticket number: ");
 
 
ticket=Integer.parseInt(inputOne);
confirm=Integer.parseInt(inputTwo);
int remainder=ticket%10;
 
String newOne=Integer.toString(confirm);
String newTwo=Integer.toString(remainder);
String newThree=Integer.toString(ticket);
 
if ((newOne + newTwo) == newThree)
{
JOptionPane.showMessageDialog(null, "The ticket number you just entered is valid", "Ticket 
 
Validator",JOptionPane.INFORMATION_MESSAGE);
}
else
{
JOptionPane.showMessageDialog(null, "The ticket number you just entered is invalid", "Ticket 
 
Validator",JOptionPane.INFORMATION_MESSAGE);
}
{
System.exit(0);
}
}
}

when it asks me to enter the first number I entered 123456, then it prompted me to enter second number and I entered 12345.
It still tells me the number is invalid.
I have a funny feeling that I did something wrong here...