13 lines
363 B
Java
13 lines
363 B
Java
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// interfaces/Sealed.java
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// (c)2021 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://OnJava8.com for more book information.
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// {NewFeature} Since JDK 17
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sealed class Base permits D1, D2 {}
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final class D1 extends Base {}
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final class D2 extends Base {}
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// Illegal:
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// final class D3 extends Base {}
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