Post by account_disabled on Dec 6, 2023 8:38:44 GMT
We may feel the consequences painfully when we need such inheritance when integrating with a framework or library. However there is a way to do this I will write about how to deal with the situation when we cannot afford to block inheritance for our classes in the next part of the article. The composer goes on a business trip As I mentioned at the beginning we often use inheritance to avoid writing code multiple times. The code becomes a member of the base class and inheriting classes can therefore also benefit from it.
However it turns out that a similar effect can be achieved by extracting the common code into a separate object and then making that object a member of the class . As a result we can say that a class does not inherit some functionality but this functionality is built into it. In more Email Marketing List detail this approach can be divided into two trends aggregation and composition [ ]. We will use the term composition in the rest of the article although it may not be entirely precise. Additionally from now on we will call the incorporated object a delegate because we are actually delegating to it the responsibility for performing some of the tasks of our class. This type of approach is often called composition over inheritance .
How would we accomplish this with our ducks? First of all we would need to create our delegate object . code From ducks to delegations or problems with inheritance in Java Listing Duck behavior delegate Notice that it contains more or less the same thing as the BaseDuck abstract class. This is not surprising after all the delegate is supposed to replace this class. And if so then we remove it because we no longer need it. After removing the abstract class we need to modify the Duck class.
However it turns out that a similar effect can be achieved by extracting the common code into a separate object and then making that object a member of the class . As a result we can say that a class does not inherit some functionality but this functionality is built into it. In more Email Marketing List detail this approach can be divided into two trends aggregation and composition [ ]. We will use the term composition in the rest of the article although it may not be entirely precise. Additionally from now on we will call the incorporated object a delegate because we are actually delegating to it the responsibility for performing some of the tasks of our class. This type of approach is often called composition over inheritance .
How would we accomplish this with our ducks? First of all we would need to create our delegate object . code From ducks to delegations or problems with inheritance in Java Listing Duck behavior delegate Notice that it contains more or less the same thing as the BaseDuck abstract class. This is not surprising after all the delegate is supposed to replace this class. And if so then we remove it because we no longer need it. After removing the abstract class we need to modify the Duck class.