I need to retrieve an Object[] of all keys in java.util.Hashtable

Question

public abstract class ArrayFunctionality {
     * Construct {@link java.lang.Object} array of keys from {@link java.util.Hashtable}
     * @param h {@link java.util.Hashtable}
     * @return array {@link java.lang.String}
     * @throws java.lang.IndexOutOfBoundsException Exception thrown if initial {@link java.lang.Object} array paramater cannot be indexed
    public static Object[] arrayKeys(Hashtable<Object, Object> h) throws IndexOutOfBoundsException {
        Vector<Object> v = new Vector<Object>();
        Enumeration keys = h.keys();
        while (keys.hasMoreElements()) v.add(keys.nextElement());
        return v.toArray();
// HOWEVER, this occurs with Hashtable<String, String> attrs:
if (hasSetHashtable) String[] keyArray = ArrayFunctionality.arrayKeys(attrs);
// DOES NOT COMPILE: ".class expected - not a statement"I am not understanding why this is occurring, please advise, I'm lost on this one.
Thanx
Phil

Answer 1

I still don't understand what you mean but it now
works..
I am sorry I just don't understand the difference
between
if (hasSetHashtable) {
String[] keyArray;
keyArray = ArrayFunctionality.arrayKeys(attrs);
}AND
if (hasSetHashtable) {
String[] keyArray =
ArrayFunctionality.arrayKeys(attrs);PhilThere is no difference between those two you posted. The difference is between
String[] keyArray;
if (...) {
    keyArray = ArrayFunctionality.arrayKeys(attrs);
}and
if (...) {
     String[] keyArray;
     keyArray = ArrayFunctionality.arrayKeys(attrs);
}In the first, the keyArray will exist outside of the scope of the if statement. In the second, the keyArray will no longer exist once you leave the if statement. Which is the same thing jbish said.