Convert a generic list to an array

Question

I have searched for this, but unfortunately, I don\'t get the correct answer.

class Helper {
    public static  T[] toArray(List list) {
           


        

Answer 1

public static  T[] toArray(Collection c, T[] a) {
    return c.size()>a.length ?
        c.toArray((T[])Array.newInstance(a.getClass().getComponentType(), c.size())) :
        c.toArray(a);
}

/** The collection CAN be empty */
public static  T[] toArray(Collection c, Class klass) {
    return toArray(c, (T[])Array.newInstance(klass, c.size()));
}

/** The collection CANNOT be empty! */
public static  T[] toArray(Collection c) {
    return toArray(c, c.iterator().next().getClass());
}