Double bracket initialization in Java does the same job as single bracket initialization in C#.
Double brackets create and initialize objects in a single Java expression.
Let us say the following is in Java -
List<String> list = new List<String>() {{ add("One"); add("Two"); add("Three"); add("Four"); }}
is the same as the collection initializer in C# -
List<String> list = new List<String>() {"One","Two", “Three”, “Four”};
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