PageNumber.java

public class PageNumber {
    private static int limit = 25;

    public static int getStartLimit(int pageNumber) {
        return (pageNumber - 1) * limit;
    }

    public static int getEndLimit(int pageNumber) {
        int fromPage = (pageNumber - 1) * limit;
        return fromPage + limit;
    }

    public static int getLimit(){
        return limit;
    }
}