在HashMap中访问工厂方法对象时出现问题

public class CustomKey {
    private String id;

    @Override
    public int hashCode() {
        return Objects.hash(id);
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) return true;
        if (obj == null || getClass() != obj.getClass()) return false;
        CustomKey other = (CustomKey) obj;
        return Objects.equals(id, other.id);
    }
}

if (map.containsKey(key)) {
    Object value = map.get(key);
    // 处理value
} else {
    // 键不存在的处理逻辑
}

ConcurrentHashMap<KeyType, ValueType> concurrentMap = new ConcurrentHashMap<>();

import java.util.HashMap;
import java.util.Map;

interface Shape {
    void draw();
}

class Circle implements Shape {
    @Override
    public void draw() {
        System.out.println("Drawing a Circle");
    }
}

class ShapeFactory {
    public static Shape createShape(String type) {
        if ("circle".equalsIgnoreCase(type)) {
            return new Circle();
        }
        return null;
    }
}

public class Main {
    public static void main(String[] args) {
        Map<String, Shape> shapeMap = new HashMap<>();
        shapeMap.put("circle", ShapeFactory.createShape("circle"));

        if (shapeMap.containsKey("circle")) {
            Shape shape = shapeMap.get("circle");
            shape.draw();
        }
    }
}