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Input Checker in Java

Input Checker in Java

It is a java program that will check in the character or string that you have input or entered matches to the criteria set in the program. If a match is found the program will display a message if not a message also displays saying that your input is invalid, which means that it has no match to the given criteria.

Source code:

import javax.swing.*;
public class InputCheckerGUI
{ 
public static void main(String args[]) {

String selected ; 
String cont="n";

do
{
	selected=JOptionPane.showInputDialog(null, "Please select a letter:" + "
" + "a" + "
" + "b" + "
" + "c" + "
" + "d");

if (selected.matches("a")){
	JOptionPane.showMessageDialog(null,selected + " is for apple");
} else if (selected.matches("b")){
	JOptionPane.showMessageDialog(null,selected + " is for ball");
}else if (selected.matches("c")){
	JOptionPane.showMessageDialog(null,selected + " is for cat");
} else if (selected.matches("d")){
	JOptionPane.showMessageDialog(null,selected + " is for dog");
}
else
{
JOptionPane.showMessageDialog(null,"invalid input");	
}

	
	cont =	JOptionPane.showInputDialog(null,"Try Again? (press y or n) ");
	}while (cont.matches("y"));

JOptionPane.showMessageDialog(null,"Program closing"  );


	}
}