test/langtools/tools/javac/generics/diamond/neg/Neg01.java

/*
 * @test /nodynamiccopyright/
 * @bug 6939620 7020044 8062373
 *
 * @summary  Check that diamond fails when inference violates declared bounds
 *           (basic test with nested class, generic/non-generic constructors)
 * @author mcimadamore
 * @compile/fail/ref=Neg01.out Neg01.java -XDrawDiagnostics
 *
 */

class Neg01<X extends Number> {

    Neg01(X x) {}

    <Z> Neg01(X x, Z z) {}

    void test() {
        Neg01<String> n1 = new Neg01<>("");
        Neg01<? extends String> n2 = new Neg01<>("");
        Neg01<?> n3 = new Neg01<>("");
        Neg01<? super String> n4 = new Neg01<>("");

        Neg01<String> n5 = new Neg01<>("", "");
        Neg01<? extends String> n6 = new Neg01<>("", "");
        Neg01<?> n7 = new Neg01<>("", "");
        Foo<? super String> n8 = new Neg01<>("", "");

        Neg01<String> n9 = new Neg01<>("", ""){};
        Neg01<? extends String> n10 = new Neg01<>("", ""){};
        Neg01<?> n11 = new Neg01<>("", ""){};
        Neg01<? super String> n12 = new Neg01<>("", ""){};

        Neg01<String> n13 = new Neg01<>(""){};
        Neg01<? extends String> n14 = new Neg01<>(""){};
        Neg01<?> n15 = new Neg01<>(""){};
        Neg01<? super String> n16 = new Neg01<>(""){};

    }
}