Java: Check if enum contains a given string?

Question

Here\'s my problem - I\'m looking for (if it even exists) the enum equivalent of ArrayList.contains();.

Here\'s a sample of my code problem:

<         


        

Answer 1

  Set.of(CustomType.values())
     .contains(customTypevalue) 

Answer 2

I don't think there is, but you can do something like this:

enum choices {a1, a2, b1, b2};

public static boolean exists(choices choice) {
   for(choice aChoice : choices.values()) {
      if(aChoice == choice) {
         return true;
      }
   }
   return false;
}

Edit:

Please see Richard's version of this as it is more appropriate as this won't work unless you convert it to use Strings, which Richards does.

Answer 3

You can use this

YourEnum {A1, A2, B1, B2}

boolean contains(String str){ 
    return Sets.newHashSet(YourEnum.values()).contains(str);
}                                  

Update suggested by @wightwulf1944 is incorporated to make the solution more efficient.

Answer 4

With guava it's even simpler:

boolean isPartOfMyEnum(String myString){

return Lists.newArrayList(MyEnum.values().toString()).contains(myString);

}

Answer 5

solution to check whether value is present as well get enum value in return :

protected TradeType getEnumType(String tradeType) {
    if (tradeType != null) {
        if (EnumUtils.isValidEnum(TradeType.class, tradeType)) {
            return TradeType.valueOf(tradeType);
        }
    }
    return null;
}

Answer 6

public boolean contains(Choices value) {
   return EnumSet.allOf(Choices.class).contains(value);
}