The assignment is to have the user put 3 words into a JOptionPane box, and then

Question

The assignment is to have the user put 3 words into a JOptionPane box, and then have those words be displayed as an acronym.  I have all of that down in the code below, but I also need the code to display an error message if exactly 3 words are not entered. How would I go about adding displaying that error message to the following code:

import javax.swing.*;

public class LetterAcronym

{

public static void main(String[] args)

{

String str = JOptionPane.showInputDialog(null,"Please enter three words");

String;

String two = "";

String three = "";

String acronym;

char c;

int counter = 0;

int stringLength = str.length();

one = Character.toString(str.charAt(0));

counter = 1;

for(int i = 1; i < stringLength; i++)

{

c=str.charAt (i);

if(Character.isWhitespace(c))

{

if(counter == 1)

{

two = Character.toString(str.charAt (i+1));

counter ++;

}

else if(counter == 2)

{

three = Character.toString(str.charAt(i+1));

counter ++;

break;

}

}

}

acronym = one.toUpperCase() + two.toUpperCase() + three.toUpperCase();

JOptionPane.showMessageDialog(null, "The Original phrase was: "+ str + " Three letter acronym is " + acronym);

}

}

Explanation / Answer

we will check if the string inputted is empty and also check that it is not a number

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