When use Braces block in Java like this?

Question

enter image description here

please see above picture (from Wrox Beginning Spring book)

I have this question that what is { } ?

Is constructor ? Is functional block ? Is block of "accountsMap" ? What is it ?

please explain this feature in java ? what is the name of this feature ?

Note to self: read all question, not just the bits in boxes (I deleted my own comment) — FreudianSlip, Jul 18 '15 at 08:54
It is an [instance initializer](http://stackoverflow.com/questions/6763550/why-java-instance-initializers). — Glorfindel, Jul 18 '15 at 08:54

score 10 · Accepted Answer · answered Jul 18 '15 at 08:54

10

It's an instance initializer block which gets executed each time you create an instance of the class, no matter which constructor is used. It is executed prior to the code of the executed constructor. See JLS 8.6 for more details.

answered Jul 18 '15 at 08:54

Eran

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Amit.rk3 · Answer 2 · 2015-07-18T09:10:14.970

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That's an instance initializer block. Whenever a new instance of any class is created, code inside these braces gets executed prior to constructor invokation. http://www.javatpoint.com/instance-initializer-block

General sequence of blocks execution.

1- Static initializer block (Invoked when class is loaded)

And when new instance is created

2- Instance initializer block
3 - Constructor

edited Jul 18 '15 at 09:10

answered Jul 18 '15 at 08:53

Amit.rk3

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This should have been a comment not answer ! – Ankur Anand Jul 18 '15 at 08:58

When use Braces block in Java like this?

2 Answers2