Question

I have an Object[] which entails lots of Objects of the type HashMap. The HashMap looks like this:

Object[]
{id=15, name=Hello}
{id=27, name=Hello}
{id=15, name=Hello}

I have tried to cast it to HashMap[], however no luck.

I would like to iterate and retrieve a list of names. Hope you can help me.

Answer 1

you can’t cast a array holding T1 to a array holding T2. An array in a actual object with a type of itself. This is the cause of your failure to cast.

However i doubt that you really have a HashMap array in there. The dump you are providing doesn’t look like a hashmap dump.

However to answer your original question you should do something like this:

    // assuming hashes is your array
    Object []hashes;

    for (Object object : hashes) {
        HashMap hash = (HashMap)object;

        for (Object o : hash.values()) {
            System.out.println(o);
        }
    }

this will print all the values on all the hashes from your array.