你不是要实现Joshua Bloch的类型安全的异构容器模式吗？基本上：
public class Favorites { private Map<Class<?>, Object> favorites = new HashMap<Class<?>, Object>(); public <T> void setFavorite(Class<T> klass, T thing) { favorites.put(klass, thing); } public <T> T getFavorite(Class<T> klass) { return klass.cast(favorites.get(klass)); } public static void main(String[] args) { Favorites f = new Favorites(); f.setFavorite(String.class, "Java"); f.setFavorite(Integer.class, 0xcafebabe); String s = f.getFavorite(String.class); int i = f.getFavorite(Integer.class); }}
