Get index of enum from string?

I might not understand you question, but the same code works for enums too:

int index = Arrays.asList(YourEnum.values()).indexOf(YourEnum.ENUM_ITEM);

Or you can get:

int index = YourEnum.valueOf("ENUM_ITEM").ordinal();

Not sure if I understand you correctly but based on question title you may be looking for

YourEnum.valueOf("VALUE").ordinal();

1. YourEnum.valueOf("VALUE") returns enum value with name "VALUE"
2. each enum value knows its position (indexed from zero) which we can get by calling ordinal() method on it.

If you want to retrieve the index, you can use ordinal. If you want to assign some specific value to String, you may define your own method to retrieve it.

 enum DAY
 {
  MONDAY(10),
  TUESDAY(20);
  int value;
  DAY(int x)
  {
   this.value = x;
  }
  public int getValue()
  {
    return value;
   }

Now value and ordinal can be retrieved as :

    for(DAY s : DAY.values() )
    {
        System.out.println(s.ordinal());
        System.out.println(s.getValue());
    }

Try this simple solution:

Fruit.values()[index]