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kotlinlang

Hm, that’s weird. I wonder why Kotlin allows a direct `.equals()` call, but not a `==` call

There can only be one `equals()` per class, how would you implement it with sealed classes?

That’s because `==` only works on the `equals` operator. You can’t overload it, but rather only override it (from `Any`).
```override fun equals(other: Any?): Boolean {
    return if (other is Color) {
        name == other.name
    } else if (other is String) {
        name == other
    } else {
        super.equals(other)
    }
}``` but just be sure to fulfill the `hashCode` contract as well

```
override fun hashCode(): Int = name.hashCode()
```

&gt; Note that the `==` operator in Kotlin code is translated into a call to [equals] when objects on both sides of the operator are not null.