initializer, instance and static initializer blocks

Hi guys,.

I have read the foregoing, mentioned in the JLS and also in a book before, but I still do not understand, what is the use of these. I have sort of a rough idea, but not exactly. I mean, what is the purpose of the initializer for instance and static initializer blocks, how can be useful? I understand that I can run pieces of code that initialize instance and static variables accordingly, but what is the difference then to use a constructor to initialize these areas? Are these pieces of code executed before the execution of any manufacturer, or when otherwise?

Sorry for my noob, I learn.

PR.

Static initializer blocks are executed when the class is loaded, once (a classloader). So that they have some use. Initializers for instance differ a lot of builders (I think that code in the initializers of the instance has been copied to each manufacturer), but they can be useful with anonymous inner classes for example (since you cannot define constructors it (well, you can, but you can't call them)).

They have a limited use, but it is good to recognize them if you see them.

Tags: Java

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