[Java Interview] Talk about the design patterns you know

"Talk about the design patterns you know!"

It's a simple question, but getting the interviewer to agree with your answer can take some work.

Hi, my name is Mic, a Java programmer who has been working for 14 years.

Today, I would like to share with you how to answer such a relatively general type of question in order to satisfy the interviewer.

I organized the text version into the 15W word interview document, you can get it from me

Check out the experts' answers below.

Expert:

Roughly classified according to the application target of the pattern, the design pattern can be divided into the creation pattern, the structural pattern and the behavior pattern.

The creational pattern is a summary of various problems and solutions in the object creation process, including various factory patterns, singleton patterns, builder patterns, and prototype patterns.

Structural pattern is a summary of software design structure, focusing on the practical experience of class, object inheritance, and composition.

Common structural patterns, including bridge pattern, adapter pattern, decorator pattern, proxy pattern, composition pattern, appearance pattern, flyweight pattern, etc.

A behavioral pattern is a pattern summarized from the perspective of interaction and division of responsibilities between classes or objects.

The more common behavioral patterns are strategy pattern, interpreter pattern, command pattern, observer pattern, iterator pattern, template method pattern, and visitor pattern.

Summarize

This question mainly examines the degree of mastery of job seekers to design patterns.

During the answering process, you can choose some common design patterns and give some cases and usage scenarios.

Such as singleton mode, decorator mode, factory mode, proxy mode, etc.

Better to deepen the interviewer's recognition of you.

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