Design pattern factory or singleton or abstract factory or builder?

Question

Hello i am looking for the design pattern of that code:

FileInputStream fin=new FileInputStream("X.zip");
BufferedInputStream bin=new BufferedInputStream(fin);
ZipInputStream zin=new ZipInputStream(bin);

i think it is a factory design pattern,what do you think guys?

Really there is no pattern,but they told me to give the name of the pattern in one word,it must be a design pattern since they asking me.

really,they ask me to give the corresponding design pattern name in one word so it must be a design pattern somewhere in the code — bassouat, Oct 10 '20 at 12:10
@TonyStark, this has been a common [interview question](https://stackoverflow.com/questions/3068912/what-is-the-most-used-pattern-in-java-io) for years. — jaco0646, Oct 10 '20 at 12:28
@DavidG, this is a common interview question. See the link in my comment above and also [Examples of GoF Design Patterns in Java's core libraries](https://stackoverflow.com/questions/1673841/examples-of-gof-design-patterns-in-javas-core-libraries). — jaco0646, Oct 10 '20 at 12:30

score 0 · Answer 1 · answered Oct 10 '20 at 12:13

0

This is the decorator design pattern. With every new instance you are adding new behavior at runtime.

answered Oct 10 '20 at 12:13

Tony Stark

thank you i think that is what they are looking for as an answer,thanks – bassouat Oct 10 '20 at 12:43

1 Answers1