供参考，这是HashMap的替代解决方案：
enum CrimeCategory { ASBO("Anti Social Behaviour"), BURG("Burglary"), CRIMDAM("Criminal Damage And Arson"), DRUGS("Drugs"), OTHTHEFT("Other Theft"), PUPDISOR("Public Disorder And Weapons"), ROBBERY("Robbery"), SHOPLIF("Shoplifting"), VEHICLE("Vehicle Crime"), VIOLENT("Violent Crime"), OTHER("Other Crime"); private static final Map<String, CrimeCategory> map = new HashMap<>(values().length, 1); static { for (CrimeCategory c : values()) map.put(c.category, c); } private final String category; private CrimeCategory(String category) { this.category = category; } public static CrimeCategory of(String name) { CrimeCategory result = map.get(name); if (result == null) { throw new IllegalArgumentException("Invalid category name: " + name); } return result; }}
