Well, C# has more powerful pattern matching, only compiler exhaustiveness on types is missing today. In Java, sum types (sealed interfaces/classes) require all members to have the same parent, so they can be used only in very narrow cases.

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vips7L 2 days ago | parent [-]

As opposed to C# that doesn't have any form of sum types?

	▲	mrsmrtss 2 days ago \| parent [-]
		C# will have more advanced sum types this year, it's currently in preview.