23 lines
592 B
Java
23 lines
592 B
Java
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// interfaces/PermittedSubclasses.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 Color permits Red, Green, Blue {}
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final class Red extends Color {}
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final class Green extends Color {}
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final class Blue extends Color {}
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public class PermittedSubclasses {
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public static void main(String[] args) {
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for(var p: Color.class.getPermittedSubclasses())
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System.out.println(p.getSimpleName());
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}
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}
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/* Output:
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Red
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Green
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Blue
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*/
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