PIbd-23_Panina_A.D.Cruiser.Hard/GenericCreate.java

import javax.swing.*;
import java.awt.*;
import java.util.Random;
import java.util.ArrayList;
public class GenericCreate<T extends EntityCruiser, U extends IDop> {
    ArrayList<T> _EntityCruiser;
    ArrayList<U> _Wheels;
    int pointerCruiser = 0;
    int pointerWheels = 0;
    public ArrayList<T> getEntities(){
        return _EntityCruiser;
    }
    public ArrayList<U> getWheels(){
        return _Wheels;
    }
    public GenericCreate(int countEntities,int countWheels){
        _EntityCruiser=new ArrayList<>(countEntities);
        _Wheels=new ArrayList<>(countWheels);
    }
    public int Add(T cruiser){
        if(pointerCruiser <= _EntityCruiser.size()){
            _EntityCruiser.add(cruiser);
            pointerCruiser++;
            return pointerCruiser;
        }
        return -1;
    }
    public int Add(U wheels){
        if(pointerWheels <= _Wheels.size()){
            _Wheels.add(wheels);
            pointerWheels++;
            return pointerWheels;
        }
        return -1;
    }
    public DrawingCruiser DrawingGeneratedCruiser()
    {
        Random rand=new Random();
        if (_EntityCruiser.size() == 0 || _Wheels.size() == 0){
            return null;
        }
        T entity = (_EntityCruiser.get(rand.nextInt(pointerCruiser)));
        U wheel = (_Wheels.get(rand.nextInt(pointerWheels)));
        if(entity instanceof EntityAdvancedCruiser){
            return new DrawingAdvancedCruiser((EntityAdvancedCruiser) entity, wheel);
        }
        return new DrawingCruiser(entity, wheel);
    }
    public DrawingCruiser[] DrawEntitiesCruiser(Graphics g, int startX, int startY) {
        DrawingCruiser[] drawingCruisers = new DrawingCruiser[_EntityCruiser.size()];
        int height = 70;
        DrawingCruiser cruiser;
        DrawingAdvancedCruiser advancedcruiser;
        for (int i = 0; i < _EntityCruiser.size(); i++) {
            if (_EntityCruiser.get(i) instanceof EntityAdvancedCruiser) {
                advancedcruiser = new DrawingAdvancedCruiser((EntityAdvancedCruiser) _EntityCruiser.get(i), null);
                advancedcruiser.SetPosition(startX , startY + i * height);
                advancedcruiser.DrawTransport(g);
            } else {
                cruiser = new DrawingCruiser(_EntityCruiser.get(i), null);
                cruiser.SetPosition(startX , startY + i * height);
                cruiser.DrawTransport(g);
            }
        }
        return drawingCruisers;
    }
}