1/** 2 * @test /nodynamiccopyright/ 3 * @bug 7062745 7157798 4 * @summary Negative test of conflicting same-name methods inherited from multiple interfaces when return type not compatible 5 * @compile/fail/ref=Test3.out -Werror -Xlint:unchecked -XDrawDiagnostics Test3.java 6 */ 7 8import java.util.List; 9import java.io.Serializable; 10 11interface A { int m(); } 12interface B { Integer m(); } 13 14interface AB extends A, B {} //error 15 16interface C { List<Integer> m(); } 17interface D { List<Number> m(); } 18 19interface CD extends C, D {} //error 20 21interface E<T> { T m(); } 22interface F<T> { T m(); } 23interface G { Serializable m(); } 24 25interface BE extends B, E<Number> {} //ok, covariant return 26 27interface BE2<T> extends B, E<T> {} //error 28 29interface EF<T> extends E<T>, F<T> {} //ok 30 31interface EF2<U, V extends U> extends E<U>, F<V> {} //ok, covariant return 32 33interface EF3<U, V> extends E<U>, F<V> {} //error 34 35interface EG<T extends Number> extends E<T>, G {} //ok 36 37interface EFG<U extends Serializable, V extends Serializable> extends E<U>, F<V>, G {} //error 38