What I have done wrong

package com.codegym.task.task12.task1210; /* Three methods and a maximum */ public class Solution { public static int max(int a, int b) { if (a > b) return a; else return b; } public static long max(long a, long b) { if (a > b) return a; else return b; } public static double max(double a, double b) { if (a > b) return a; else return b; } }