java - 构造函数内的代码

Question

我有以下 Java 类:

public class MyClass{
    private List<MyObject> lst;

    public MyClass(){
        //----Starting initial code-----
        MyAdditionalObject obj=new MyAdditionalObject();
        Event e= new Event()
        obj.attacheEvent(e);
        //----initial code end-----
        lst.add(e);
    }
}

将此类初始代码放入构造函数中是一种不好的做法吗？

Answer 1

如果您有重载构造函数，请使用初始化 block 以避免代码重复。

public class MyClass{
   private List<MyObject> lst;

   //Initialization block
   {
       //----Starting initial code-----
       MyAdditionalObject obj=new MyAdditionalObject();
       Event e= new Event()
       obj.attacheEvent(e);
       //----initial code end-----
   }

   public MyClass(){...}

   public MyClass(int i){...}

   public MyClass(String i){...}

}