/*

 * @test /nodynamiccopyright/

 * @bug 6563143 8008436 8009138

 * @summary javac should issue a warning for overriding equals without hashCode

 * @summary javac should not issue a warning for overriding equals without hasCode

 * @summary javac, equals-hashCode warning tuning

 * if hashCode has been overriden by a superclass

 * @compile/ref=EqualsHashCodeWarningTest.out -Xlint:overrides -XDrawDiagnostics EqualsHashCodeWarningTest.java

 */

import java.util.Comparator;

public class EqualsHashCodeWarningTest {

    @Override

    public boolean equals(Object o) {

        return o == this;

    }

    @Override

    public int hashCode() {

        return 0;

    }

    public Comparator m() {

        return new Comparator() {

            @Override

            public boolean equals(Object o) {return true;}

            @Override

            public int compare(Object o1, Object o2) {

                return 0;

            }

        };

    }

}

class SubClass extends EqualsHashCodeWarningTest {

    @Override

    public boolean equals(Object o) {

        return true;

    }

}

@SuppressWarnings("overrides")

class DontWarnMe {

    @Override

    public boolean equals(Object o) {

        return true;

    }

}

class DoWarnMe {

    @Override

    public boolean equals(Object o) {

        return o == this;

    }

}

abstract class IamAbstractGetMeOutOfHere {

    public boolean equals(Object o){return true;}

}

interface I {

    public boolean equals(Object o);

}

enum E {

    A, B

}

@interface anno {}