Java Program to check the Year is Centurion Leap Year or not

import java.io.*;
import java.util.*;
public class Year2{
    Scanner scan=new Scanner(System.in);
    int year=0;
    public void input()throws Exception{
        System.out.println("Enter any Year: ");
        year=scan.nextInt();
        do{
            if(year<400){
                do{                
                    System.out.println("Re-enter the year (year>=400): ");
                    year=scan.nextInt();
                    if(year<400){
                        for(int i=1; ; i++){
                            System.out.println("Re-enter the year (year>=400): ");
                            year=scan.nextInt();
                        }
                    }
                }
                while(year<400);
            }
        }
        while(year<400);
    }

    public void compute(){
        if(year%400==0)
            System.out.println("Year "+year+" is Centurien Leap Year.");
        else
            System.out.println("Year "+year+" is not Centurien Leap Year.");
    }

    public static void main(String[] args)throws Exception{
        Year2 obj=new Year2();
        obj.input();
        obj.compute();
    }
}