如何在代码中实现聚合和关联？

Question

代码中的聚合和关联是什么？（Java或C＃）
我找不到“聚合和关联”的代码示例。

Answer 1

协会示例：员工有地址

public class Employee  
{         
   public Address address; //Employee HAS-A Address  
}

汇总示例：员工有很多地址

public class Employee  
{         
  public List<Address> address; //Employee HAS-Many Address  
}

请参阅：C# code for association, aggregation, composition