Enum in Java. Advantages?

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You get free compile time checking of valid values. Using

public static int OPTION_ONE = 0;
public static int OPTION_TWO = 1;

does not ensure 

void selectOption(int option) {
...
}

will only accept 0 or 1 as a parameter value. Using an enum, that is guaranteed. Moreover, this leads to more self documenting code, because you can use code completion to see all enum values.

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