44 lines
1.4 KiB
Java
44 lines
1.4 KiB
Java
/*
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* @test /nodynamiccopyright/
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* @bug 4916607
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* @summary Test casts (warning)
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* @author gafter
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*
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* @compile/ref=CastWarn.out -XDrawDiagnostics -Xlint:unchecked CastWarn.java
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*/
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import java.util.*;
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class CastWarn {
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// --- Disjoint ---
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private interface DA<T> { }
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private interface DB<T> extends DA<T> { }
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private interface DC<T> extends DA<Integer> { }
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private <N extends Number, I extends Integer, R extends Runnable, S extends String> void disjointness() {
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Object o;
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// Classes
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o = (DA<? extends Runnable>) (DA<? extends Number>) null; // <<warn 2>>
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o = (DA<? super Integer>) (DA<? extends Number>) null; // <<warn 3>>
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o = (DA<? super String>) (DA<? super Number>) null; // <<warn 4>>
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// Typevars
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o = (DA<? extends Integer>) (DA<N>) null; // <<warn 5>>
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o = (DA<I>) (DA<? extends Number>) null; // <<warn 6>>
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o = (DA<N>) (DA<? extends Integer>) null; // <<warn 7>>
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o = (DA<N>) (DA<? extends Runnable>) null; // <<warn 8>>
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o = (DA<N>) (DA<I>) null; // <<warn 9>>
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o = (DA<N>) (DA<R>) null; // <<warn 10>>
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// Raw (asymmetrical!)
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o = (DA<Number>) (DB) null; // <<warn 11>>
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o = (DA<? extends Number>) (DB) null; // <<warn 12>>
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o = (DB<Number>) (DA) null; // <<warn 13>>
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o = (DB<? extends Number>) (DA) null; // <<warn 14>>
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}
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}
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