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);
}
}
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