Emacs. Specific formatting autopair for "{" - emacs

Question

I have found many ways to automatically insert "}" after typing "{" but never found the following implementation:
After typing "{" it moved on the next line (with indented if necessary), next is an empty string with the cursor, and "}" on the next line:
if (i == 0)*here we typing "{"*
and get the following:
if (i == 0)
{
|
}
and for nested brackets:
if (i == 0)
{
if (j == 0)
{
|
}
}
How to do this?
Note: I already use yasnipped but it does not work for functions.

Answer 1

If you are using electric-pair-mode, you can supply your own function:
(defun my-electric-pair-open-newline-between-pairs()
"Indent paired char and empty line"
(when (and (eq last-command-event ?\n)
(< (1+ (point-min)) (point) (point-max))
(eq (save-excursion
(skip-chars-backward "\t\s")
(char-before (1- (point))))
(matching-paren (char-after))))
(save-excursion
(insert "\n")
(indent-according-to-mode))
(indent-according-to-mode))
nil)
(setq-default electric-pair-open-newline-between-pairs 'my-electric-pair-open-newline-between-pairs)
(electric-pair-mode 1)
It will do what you describe only if you hit return between empty brackets.

Answer 2

I did something similar to this to try to emulate Eclipse's newline functionality.
(defun my-newline ()
(interactive)
(let ((s (buffer-substring (point-at-bol) (point))))
(cond
((string-match ".*{$" s) ; matching a line ending with {
(move-end-of-line nil)
(insert "}") ; insert }. Can be removed if already being inserted
(backward-char 2)
(newline-and-indent)
(forward-char)
(newline-and-indent)
(move-beginning-of-line nil)
(backward-char 1)
(newline-and-indent))
(t (newline-and-indent)))))
You can then attach it to whatever keybinding you like. I overrode C-j as that was what I was used to.
(defun my-newline-hook ()
(local-set-key (kbd "C-j") 'my-newline))
(add-hook 'java-mode-hook 'my-java-hook)
The regex and steps taken can be adjusted to fit your needs.