How to get an enum value from a string value in Java?

Question

I have an enum,

public enum Blah

{

  Q,W,E,R

}

And I want to find the enum value of a string, for example, "Q"  which would be Blah.Q . How can I do this?

Is the Enum.valueOf() the method I need? If so, how would I use this?

Answer 1

Yes, Enum.valueOf() will work fine.

Blah.valueOf("Q") will give you Blah.Q.

Here’s the method you can use to find the enum value of a string:

 /**

* A general method for all enums since they can't have another base class

* @param <T> Enum type

* @param c enum type. All enums must be all caps.

* @param string case insensitive

* @return corresponding enum, or null

*/

public static <T extends Enum<T>> T getEnumFromString(Class<T> c, String string) {

   if( c != null && string != null ) {

       try {

           return Enum.valueOf(c, string.trim().toUpperCase());

       } catch(IllegalArgumentException ex) {

       }

   }

   return null;

}

0) : "length is too short"));

 

If you have any doubts, mention them in the comment section below.