CODEWITHSUNDEEP
javasyntaxdouble-brace-initialize
gWombat
gWombat

Reputation: 517

Java instanciation syntax explanation

Reading a Java project on GitHub, I found a code syntax that I have never seen before and I would some explanation, please. Here is the code:

Book book = new BookBuilder() {
    {
        description("blabla");
        author("blabla");
        title("blabla");
        isbn("123456789");
        category(category);
    }
}.build();

BookBuilder seems to be a standard java class and each of methods called (description, author...) return a BookBuilder object.
My question is, what does the syntax book = new BookBuilder() {{ ... }} means?

Upvotes: 0

Views: 33

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