我想根据其字段值获取一个特定的枚举.
枚举：
public 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 String category;
private CrimeCategory (String category) {
this.category = category;
}
public String returnString() {
return category;
}
}
获得新的枚举：
aStringRecivedFromJson = "Anti Social BehavIoUr" CrimeCategory crimeCategoryEnum; crimeCategoryEnum = CrimeCategory.valueOf(aStringRecivedFromJson);
我一直在试图找出一个方法,以便上面提供一个枚举,以便它可以通过与其他犯罪信息一起散布在Hashmap中.
预期成果：ASBO
解决方法
作为参考,这里有一个替代解决方案与HashMap：
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;
}
}
