ถ้าผมจะ fork code Java ไปเป็น GUI ต้องทำอย่างไรครับ

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 */

package colorlike;

/**
 *
 * @author วรรณพงษ์
 */
import java.util.Scanner;
public class one {
    private static String a;
        public static void main(String[] args) {
            System.out.println("What color do you like?\n");
            System.out.println("=======================");
            System.out.println("Numbers _ Means");
            System.out.println("1          Pink\n");
            System.out.println("2          Red\n");
            System.out.println("3          Purple\n");
            System.out.println("4          Yellow\n");
            System.out.println("5          Green\n");
            System.out.println("6          Brown\n");
            System.out.println("7          White\n");
            System.out.println("8          Back\n");
                Scanner keyboard = new Scanner(System.in);
    System.out.println("enter :");
    int myint = keyboard.nextInt();
            switch (myint) {
            case 1:  a = "Pink: If you like this color, it means you are charm and romance. You always have beautiful dream and you want everyone takes care of you.";
                     break;
            case 2:  a = "Red :  If you like this color, It means you always want to be the winner and you are sexy.  You have confident . You are impatient, aggressive and outspoken.";
                     break;
            case 3:  a = "Purple: If you like this color, you always like a child because you always image everything around you.";
                     break;
            case 4:  a = "Yellow: If you like this color, it means you are cheerful. You like to find the new thing and you like metamorphism.";
                     break;
            case 5:  a = "Green: If you like this color, it means you are quiet, kind, generous and you have justness.";
                     break;
            case 6:  a = "Brown: If you like this color, it means you always think about what you look like and your health but you don’t have confident.";
                     break;
            case 7:  a = "White: If you like this color, it means you are pure and gentle. You are neat and you have confident.";
                     break;
            case 8:  a = "Back : If you like this color, it means you are deep person.  But sometime it looks sexy. You are indecisive.";
                     break;
            default: a = "Invalid color :(";
                     break;
        }
        System.out.println("Message : " + a); 
        }
    
}