given an object how to know the overridden inherited methods

Question

Given the following code:

class A{
    int i;
        int hashcode(){
            . . .
        }
}

Precisely, given an object a of A how can one say that hashcode() which inherited from Object class is overridden in the class A.

a.getClass().getDeclaringClass() is returning Objectclass. I want it to output A.

@sᴜʀᴇsʜᴀᴛᴛᴀ Note that we are not looking for overridden methods, but for overriding methods. Both have not the same solution. — sp00m, Dec 10 '13 at 08:15

score 1 · Accepted Answer · answered Dec 09 '13 at 14:27

This should suit your needs:

public static Set<Method> findOverridingMethods(Object o) {
    Set<Method> overridingMethods = new HashSet<Method>();
    Class<?> clazz = o.getClass();
    for (Method method : clazz.getDeclaredMethods()) {
        Class<?> current = clazz.getSuperclass();
        while (current != null) {
            try {
                current.getDeclaredMethod(method.getName(), method.getParameterTypes());
                overridingMethods.add(method);
            } catch (NoSuchMethodException ignore) {
            }
            current = current.getSuperclass();
        }
    }
    return overridingMethods;
}

score 0 · Answer 2 · answered Dec 09 '13 at 14:20

0

I think that you have to use the Method object obtained by using

getClass().getDeclaredMethod("hashCode").getDeclaringClass()

answered Dec 09 '13 at 14:20

Adam Arold

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How can it work? Do you have any working example? – sp00m Dec 10 '13 at 08:13
This **is** actually a working example. – Adam Arold Dec 10 '13 at 09:41

given an object how to know the overridden inherited methods

2 Answers2