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Push Down

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Title: Push Down  
Author: World Heritage Encyclopedia
Language: English
Subject: Code refactoring
Collection: Code Refactoring
Publisher: World Heritage Encyclopedia
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Push Down

In software engineering, Push Down refactoring involves moving a method from a superclass into a subclass. Compare the following Java classes before and after the Push Down refactor is applied:

   public class SuperClass{
       void methodA() {
           //do something        
       }
       void methodB() {
           //do something else
       }
   }
   public class SubClass extends SuperClass {
       void methodC() {
           //do something
       }
   }

After the Push Down refactor is applied:

   public class SuperClass{
       void methodA() {
           //do something        
       }
   }
   public class SubClass extends SuperClass{
       void methodB() {
           //do something
       }
       void methodC() {
           //do something else
       }
   }

See also

Pull Up refactoring

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