import java.util.Scanner;

public class Main {

public static void main(String[] args) {

    List list = new List();

    int value;
    int color;

    Scanner scan = new Scanner(System.in);

    System.out.println("Menu");
    System.out.println("1 - Make list" + "n" + "2 - Show massive" + "n" + "3 - Show number of elements" + "n" +
            "4 - Show cards by the value" + "n" + "5 - Show cards by color" + "n" + "6 - Remove" + "n" + "7 - Quit" + "n");

    byte functuion = scan.nextByte();

    boolean isQuit = false;

    while (!isQuit){

        switch (functuion){

            case 1 : list.makeList();
                break;

            case 2 :
                if (!list.isEmpty())
                list.showList();
                break;

            case 3 :
                System.out.println("Number of elements: ");
                list.showNumberOfElements();
                break;

            case 4 :
                System.out.println("Enter value for search: ");
                scan.nextLine();
                value = scan.nextInt();
                list.showByValue();
                break;

            case 5 :
                System.out.println("Enter color for search: ");
                scan.nextLine();
                color = scan.nextInt();
                list.showByColor();
                break;

            case 6 :
                System.out.println("Enter value of card that you want to remove: ");
                value = scan.nextInt();
                System.out.println("Enter color of card that you want to remove: ");
                color = scan.nextInt();
                Card key = new Card(value, color);
                list.remove(key);
                break;

            case 7 :
                isQuit = true;
                break;

        }
    }

}
}

import java.util.Random;

public class List {

private Element first;

public List() {

    first = null;

}

public boolean isEmpty(){

    return (first == null);

}

public void makeList() {

    Random random = new Random();

    int mValue = random.nextInt(14) + 1;
    int mColor = random.nextInt(3);

    insertFirst(new Card(mValue, mColor));

}

public void insertFirst(Card cd) {

    Element newElement = new Element(cd);
    newElement.next = first;
    first = newElement;

}

public void showList() {

    Element current = first;

    int i = 1;

    while (current != null){

        System.out.println(i + " element: ");
        current.showElement();
        current = current.next;
        i++;

    }

}

public void showNumberOfElements() {



}

public void showByValue() {



}

public void showByColor() {



}

public Element remove(Card key) {

    Element current = first;
    Element previous = first;

    while (current.cardData != key){

        if (current.next == null)
            return null;
        else {

            previous = current;
            current = current.next;

        }

    }

    if (current == first)
        first = first.next;
    else
        previous.next = current.next;

    return current;
}
}

public class Element {

public Card cardData;
public Element next;

public Element(Card cd) {

    this.cardData = cd;

}

protected void showElement(){

    System.out.println("Value: " + cardData.getCardValue() + "n" + "Color: " + cardData.getCardColor() + "n");

}
}

public class Card {

int cardValue;
int cardColor;

public Card(int value, int color) {

    this.cardValue = cardValue;
    this.cardColor = cardColor;

}

public int getCardValue() {
    return cardValue;
}

public int getCardColor() {
    return cardColor;
}
}