import java.util.*;

class Foo {
        private String name;

        public Foo(String name) {
                this.name = name;
        }

        public String getName() {
                return name;
        }

        public boolean equals(Foo otherFoo) {
                return this.getName().equals(otherFoo.getName());
        }

        public int hashCode() {
                return name.hashCode();
        }
}

public class Test {

        public static void main(String [] args) {
                HashMap<Foo, String> test = new HashMap<Foo, String>();
                Foo firstFoo = new Foo("foo");
                test.put(firstFoo, firstFoo.getName());
                Foo secondFoo = new Foo("foo");
                System.out.println("Equals:   " + firstFoo.equals(secondFoo));
                System.out.println("Contains: " + test.containsKey(secondFoo));
                System.out.println("Why is the first statement true, but the second false!?");
                System.out.println("I overloaded hashCode and equals, so it should work!");
                System.out.println("At least, according to http://java.sun.com/javase/6/docs/api/java/util/Map.html#containsKey(java.lang.Object) it should!");
                System.out.println("So where's the problem?");
                System.exit(-1);
        }

}

return ((otherFoo instanceof Foo) && this.getName().equals (((Foo)otherFoo).getName()));