CODEWITHSUNDEEP
javaif-statementenums
SirFerret
SirFerret

Reputation: 61

Make an IF-like statement with Enum

How would I go about making an If-like statment based on a Enum value.

My Enum gameStatus has the states WON, LOST, CONTINUE, and NOTSTARTED. I want to make a decision based on the current Enum value.

Something that would work like this: 

if(gameStatus == WON)
{
    point++;
}
else if(gameStatus == LOST)
{
    point--;
}

Upvotes: 0

Views: 74

Answers (2)

Amir Afghani
Amir Afghani

Reputation: 38531

You have a third option in your scenario, which is to define an abstract method on the enum class, and override the method so there is no if else or switch at all!

   ...
   point = point + gameStatus.score();
   ...

    enum STATE {
      WIN {
            @Override
            public int score() {
                return 1;
            }
        }, 
      LOSE {
            @Override
            public int score() {
                return -1;
            }
        }
        public abstract int score();
    }

Upvotes: 2

Matt Ball
Matt Ball

Reputation: 359786

You have a few reasonable options. You can either static import the enum fields:

import static com.example.foo.GameStatus.*;

or instead qualify them with the enum type name, so that your code actually looks like

if(gameStatus == GameStatus.WON)
{
    point++;
}
else if(gameStatus == GameStatus.LOST)
{
    point--;
}

or you can avoid both if you use a switch instead of if/else:

switch (gameStatus) {
    case WON:
        point++;
        break;
    case LOST:
        point--;
        break;   
}

Upvotes: 3

Related Questions