PageRequest in Spring Boot undefined

I'm trying to implement pagination controller in my Springboot application, but I got this error:

The constructor PageRequest(int, int) is undefined) (problem #1)
​

I add an argument to match pagerequest (int, int, sort) to fix the problem, but the sort class is protected, so it says that the constructor PageRequest(int, int, Sort) is not visible (problem #2)

Problem #1:

@GetMapping("/list")
@ResponseBody
public Page<Posts> Pagination(@RequestParam(defaultValue="0") int page) {

return PostsRepository.findAll(new PageRequest(page,4));

}


Problem #2:

@GetMapping("/list")
@ResponseBody
public Page<Posts> Pagination(@RequestParam(defaultValue="0") int page) {

return PostsRepository.findAll(new PageRequest(page,4,null));

}

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