抽象 - 封装和多态 - 重载之间的区别

Question

我正在阅读有关这些术语的不同文章，但我无法理解这些术语之间的实际区别。我需要一些真实的示例，例如一些代码示例，以了解抽象和封装是如何工作的。 有人也请告诉我多态性和重载之间的区别。非常感谢您的帮助。

Answer 1

您好，您可以尝试阅读这篇文章，也许会有所帮助：

 Short answer: 
  They are the same. 

 Long Answer, (and yet less revealing): 


  Polymorphism is simply the ability to have many different methods (Or functions, 
 for those who are used to C-Type programs) to have the same name but act differently 
  depending on the type of parameters that were passed to the function. 

 So for example, we may have a method called punch, which accepts no parameters at 
   all, 
 and returns an integer: 

  public int punch() 
 { 
  return 3; 
} 


  We could also have a method named punch that accepts a String and returns a 
boolean. 

public boolean punch(String poorGuyGettingPunched) 
{ 
 if(poorGuyGettingPunched.equals("joe")) 
{ 
 System.out.println("sorry Joe"); 
 return true; 
 } 
 else 
   return false; 
   } 

 That is called polymorphism... And strangely enough, it is also called overloading.