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/**
* @test /nodynamiccopyright/
* @bug 7062745 7157798
* @summary Negative test of conflicting same-name methods inherited from multiple interfaces when return type not compatible
* @compile/fail/ref=Test3.out -Werror -Xlint:unchecked -XDrawDiagnostics Test3.java
*/
import java.util.List;
import java.io.Serializable;
interface A { int m(); }
interface B { Integer m(); }
interface AB extends A, B {} //error
interface C { List<Integer> m(); }
interface D { List<Number> m(); }
interface CD extends C, D {} //error
interface E<T> { T m(); }
interface F<T> { T m(); }
interface G { Serializable m(); }
interface BE extends B, E<Number> {} //ok, covariant return
interface BE2<T> extends B, E<T> {} //error
interface EF<T> extends E<T>, F<T> {} //ok
interface EF2<U, V extends U> extends E<U>, F<V> {} //ok, covariant return
interface EF3<U, V> extends E<U>, F<V> {} //error
interface EG<T extends Number> extends E<T>, G {} //ok
interface EFG<U extends Serializable, V extends Serializable> extends E<U>, F<V>, G {} //error
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