Хэлп

if (a >= b && a >= c && a >= d) System.out.println(a);
else if (b >= a && b >= c && b >= d) System.out.println(b);
else if (c >= a && c >= b && c >= d) System.out.println(c);
else if (d >= a && d >= b && d >= c) System.out.println(d);

System.out.println(Math.max(Math.max(a, b), Math.max(c, d)));

public class Solution {
    public static void main(String[] args) throws Exception {
        BufferedReader r = new BufferedReader(new InputStreamReader(System.in));
        int a = Integer.parseInt(r.readLine());
        int b = Integer.parseInt(r.readLine());
        int c = Integer.parseInt(r.readLine());
        int d = Integer.parseInt(r.readLine());
        System.out.println(max(max(a, b), max(c, d)));
    }
    public static int max(int a, int b) {
        if (a > b) return a;
        else return b;
    }
}