Thread: Help with swing GUI

I wrote this program and it works perfectly running in the console. I want to use swing dialog boxes. I replaced all my console outputs with
JOptionPanes. But I realize I need to find a way to store my iterations as Strings. How would I store each iteration in a String variable. Here
is my code:

import java.util.*;
import javax.swing.*;
 
public class TelephoneNumber2
{
	static Scanner console = new Scanner(System.in);
	public static void main(String[] args)
	{
		String inputStr, lowerCase, preStr, postStr, phrase1;
		int hyphenIndex, i, j = 0, k, l = 0, h, length, preLength, postLength, num = 0;
		char character, character2;
 
		//System.out.println("Please enter the phone number as a phrase(including hyphen): ");
		JOptionPane jop = new JOptionPane();
 
		inputStr = jop.showInputDialog("Please enter the phone number as a phrase(including hyphen): ");
 
		//inputStr = console.next();
		lowerCase = inputStr.toLowerCase();	
		hyphenIndex = lowerCase.indexOf('-');
		length = lowerCase.length();
		preStr = lowerCase.substring(0, hyphenIndex);
		postStr = lowerCase.substring(hyphenIndex + 1, length);
		preLength = preStr.length();
		postLength = postStr.length();
 
		//System.out.print("The phone number is: ");
		phrase1 = "The phone number is: ";
 
		if(preLength == 3)
		{
		i = preLength - 1;
 
		while(i >= 0)
		{
			character = preStr.charAt(j);
			i--;
			j++;
 
			switch(character)
			{
				case 'a':
 
				case 'b':
 
				case 'c':
					num = 2;
					break;
 
				case 'd':
 
				case 'e':
 
				case 'f':
					num = 3;
					break;
 
				case 'g':
 
				case 'h':
 
				case 'i':
					num = 4;
					break;
 
				case 'j':
 
				case 'k':
 
				case 'l':
					num = 5;
					break;
 
				case 'm':
 
				case 'n':
 
				case 'o':
					num = 6;
					break;
 
				case 'p':
 
				case 'q':
 
				case 'r':
 
				case 's':
					num = 7;
					break;
 
				case 't':
 
				case 'u':
 
				case 'v':
					num = 8;
					break;
 
				case 'w':
 
				case 'x':
 
				case 'y':
 
				case 'z':
					num = 9;
					break;	
			}
 
 
			//System.out.print(num);
			jop.showMessageDialog(null, num, "tele", jop.INFORMATION_MESSAGE);
		}
 
 
			//System.out.print("-");
			jop.showMessageDialog(null, "-", "tele", jop.INFORMATION_MESSAGE);
			}
			else
			{
				j = 0;
				i = 2;
				while(i >= 0)
				{
			character = preStr.charAt(j);
			i--;
			j++;
 
			switch(character)
			{
				case 'a':
 
				case 'b':
 
				case 'c':
					num = 2;
					break;
 
				case 'd':
 
				case 'e':
 
				case 'f':
					num = 3;
					break;
 
				case 'g':
 
				case 'h':
 
				case 'i':
					num = 4;
					break;
 
				case 'j':
 
				case 'k':
 
				case 'l':
					num = 5;
					break;
 
				case 'm':
 
				case 'n':
 
				case 'o':
					num = 6;
					break;
 
				case 'p':
 
				case 'q':
 
				case 'r':
 
				case 's':
					num = 7;
					break;
 
				case 't':
 
				case 'u':
 
				case 'v':
					num = 8;
					break;
 
				case 'w':
 
				case 'x':
 
				case 'y':
 
				case 'z':
					num = 9;
					break;	
			}
 
 
			//System.out.print(num);
			jop.showMessageDialog(null, num, "tele", jop.INFORMATION_MESSAGE);
 
 
		}
			//System.out.print("-");
			jop.showMessageDialog(null, "-", "tele", jop.INFORMATION_MESSAGE);
			}
 
			h = preLength - 4;
			j = 3;
 
			while(h >= 0)
		{
			character = preStr.charAt(j);
			h--;
			j++;
 
			switch(character)
			{
				case 'a':
 
				case 'b':
 
				case 'c':
					num = 2;
					break;
 
				case 'd':
 
				case 'e':
 
				case 'f':
					num = 3;
					break;
 
				case 'g':
 
				case 'h':
 
				case 'i':
					num = 4;
					break;
 
				case 'j':
 
				case 'k':
 
				case 'l':
					num = 5;
					break;
 
				case 'm':
 
				case 'n':
 
				case 'o':
					num = 6;
					break;
 
				case 'p':
 
				case 'q':
 
				case 'r':
 
				case 's':
					num = 7;
					break;
 
				case 't':
 
				case 'u':
 
				case 'v':
					num = 8;
					break;
 
				case 'w':
 
				case 'x':
 
				case 'y':
 
				case 'z':
					num = 9;
					break;	
			}
 
 
			//System.out.print(num);
			jop.showMessageDialog(null, num, "tele", jop.INFORMATION_MESSAGE);
		}
 
			k = 6 - preLength;
 
			while(k >= 0)
			{
				character2 = postStr.charAt(l);
				k--;
				l++;
 
				switch(character2)
			{
				case 'a':
 
				case 'b':
 
				case 'c':
					num = 2;
					break;
 
				case 'd':
 
				case 'e':
 
				case 'f':
					num = 3;
					break;
 
				case 'g':
 
				case 'h':
 
				case 'i':
					num = 4;
					break;
 
				case 'j':
 
				case 'k':
 
				case 'l':
					num = 5;
					break;
 
				case 'm':
 
				case 'n':
 
				case 'o':
					num = 6;
					break;
 
				case 'p':
 
				case 'q':
 
				case 'r':
 
				case 's':
					num = 7;
					break;
 
				case 't':
 
				case 'u':
 
				case 'v':
					num = 8;
					break;
 
				case 'w':
 
				case 'x':
 
				case 'y':
 
				case 'z':
					num = 9;
					break;	
			}
 
			//System.out.print(num);
			jop.showMessageDialog(null, num, "tele", jop.INFORMATION_MESSAGE);	
			}
 
 
 
 
	}	
 
}