Java create enum from String

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Lookup Java enum by string value 23 answers

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添加并使用这种方法

public static PaymentType parse(String type) {
    for (PaymentType paymentType : PaymentType.values()) {
        if (paymentType.getType().equals(type)) {
            return paymentType;
        }
    }
    return null; //or you can throw exception
}

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Enum does not have ready to use method for this. You either need to use exact field names:

PaymentType.valueOf("SUBSCRIPTION_MODIFY");

Or write your own method, for example:

public static PaymentType fromString(String string) {
  for (PaymentType pt : values()) {
    if (pt.getType().equals(string)) {
      return pt;
    }
  }
  throw new NoSuchElementException("Element with string " + string + " has not been found");
}

So this code:

public static void main(String[] args) {
  System.out.println(PaymentType.fromString("subscr_modify"));
}

Prints:

SUBSCRIPTION_MODIFY

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valueOf returns the enum item whose identifier matches the string you passed in.
For instance:

PaymentType t = PaymentType.valueOf("SUBSCRIPTION_NEW");

If you want to get the enum item whose type field matches a given string, write a static method on PaymentType that loops through PaymentType.values() and returns the matching item.

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