import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;
import java.util.ArrayList;

public class CharacterSorter {
    public static ArrayList<Character> characterList = new ArrayList<Character>();

    public static void main(String[] args){

        System.out.println("Welcome to Character Sorter Program");
        System.out.println("Please input a string to be sorted");

        Scanner scanner = new Scanner(System.in);
        String character = scanner.nextLine();

        boolean exit = false;
        while (!exit) {
            System.out.println("Please select the option you would like to see");
            System.out.println("");
            System.out.println("1. Display character frequencies alphabetically");
            System.out.println("2. Display sorted frequencies");
            System.out.println("3. Show types of character frequencies");
            System.out.println("4. Exit");

            int select = scanner.nextInt();
            if (select > 4 && select < 0){
                System.out.println("Error, bad input, please enter a number 1-4");
            }
            if (select == 1){
                alphabeticalSort();
            }
            if (select == 2){
                frequencySort();
            }
            if (select == 3){
                charTypes();
            }
            if (select == 4){
                System.out.println("Character Sorter Exited Successfully");
                exit = true;
            }
        }
    }
    public static void alphabeticalSort(String string) {
        for(Character c: string.toCharArray()){
            characterList.add(c);
        }
        Collections.sort(characterList);
        characterList.forEach(c->System.out.print(c));
    }

// characterList.add(character);
    public static void frequencySort(){

    }
    public static void charTypes(){

    }
}