如何为空arg构造函数提供init方法？(How to provide an init method for empty arg constructor?)

 我有一些应该是Serializable类，因此需要一个空参数构造函数。 此外，我想为所有类实现提供一些自定义的init()例程。 
 
 到目前为止，我在无参数构造函数中使用了init() 。 但是，由于我现在需要一个空的无参数构造函数来进行序列化，我如何确保所有实现的自动执行的init()方法？ 
 
 例： 
 
abstract class Foo implements Serializable {
   int id;

   Foo() {
      id = UUID.randomUUID();
   }
}

class Bar extends Foo {
   Bar() {}
   Bar(String param) {
      //...
   }
}
 
 这就是我曾经拥有的。 始终为隐式的任何实现调用Foo()构造函数。 实现不必考虑任何UUID生成。 
 
 当我必须使Foo()成为Serialization的空构造函数时，我怎样才能实现相同的目标？ 

I have some classes that should be Serializable, thus require an empty argument constructor. Further I'd like to have some custom init() routine for all class implementation.
 
So far I had the init() just inside the no argument constructor. But as I now need an empty no-arg constructor for serialization, how can I ensure an auto-executed init() method for all implementations?
 
Example:
 
abstract class Foo implements Serializable {
   int id;

   Foo() {
      id = UUID.randomUUID();
   }
}

class Bar extends Foo {
   Bar() {}
   Bar(String param) {
      //...
   }
}
 
This is what I used to have. The Foo() constructor is always called for any implementations implicit. The implementation does not have to take any UUID generation into account.
 
How can I achieve the same when I have to necessarily make the Foo() an empty constructor for Serialization?

原文：https://stackoverflow.com/questions/15730148