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33 lines
687 B
33 lines
687 B
6 years ago
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/*
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* Copyright (c) 2018-present, Facebook, Inc.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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class Casts {
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// there is no way to test this dynamically, as to avoid an exception
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// we must first create a CastsC object. So this is more for documenting.
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public static void main(String args[]) {
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CastsA.downcast(new CastsC());
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}
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}
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class CastsA {
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static CastsC downcast(CastsB c) {
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return (CastsC) c;
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}
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static boolean checkclass(CastsD d) {
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return d instanceof CastsE;
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}
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}
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class CastsB {}
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class CastsC extends CastsB {}
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class CastsD {}
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class CastsE extends CastsD {}
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