Question

In Java, when you iterator over a Vector<String[]>, why is .next() an Object that needs to be casted to String[], to use each element as a String[]?

EDIT:

Here is my code:

    Iterator itr = getIdAndName().iterator();
    while( itr.hasNext() ) {
        String[] stringArray = (String[])itr.next();
        String id = stringArray[0];
        String name = stringArray[1];
        System.out.println(id + ": " + name);
    }

getIdAndName() returns Vector<String[]>.

Answer 1

It isn’t. The only thing I can think of is you’re not typing your iterator, i.e. you’re doing this:

Vector<String[]> vector;
Iterator it = vector.iterator();
Object obj = it.next();

when you should be doing:

Vector<String[]> vector;
Iterator<String[]> it = vector.iterator();
String[] next = it.next();

Well, in most cases you don’t actually need the iterator directly, so you could just use:

Vector<String[]> vector;
for (String[] element : vector) {
    //...
}