Что не так?
package com.javarush.task.task25.task2502;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
/*
Машину на СТО не повезем!
*/
public class Solution {
public static enum Wheel {
FRONT_LEFT,
FRONT_RIGHT,
BACK_LEFT,
BACK_RIGHT
}
public static class Car {
protected List<Wheel> wheels;
public Car() throws IllegalArgumentException {
String[] arr = loadWheelNamesFromDB();
if (arr.length != 4) {
throw new IllegalArgumentException();
}
for (String str : arr) {
wheels.add(Wheel.valueOf(str));
}
}
protected String[] loadWheelNamesFromDB() {
//this method returns mock data
return new String[]{"FRONT_LEFT", "FRONT_RIGHT", "BACK_LEFT", "BACK_RIGHT"};
}
}
public static void main(String[] args) {
}
}