Question

I should find unique numbers in Vector:

Vector c = new Vector();

Something like:

int[] u = c.unique();

How can I do this?

Answer 1

The easiest thing to program would be to use a Set<Integer>. For instance, this will print the unique elements:

Vector<Integer> c = new Vector<Integer>();
// add elements to c

Set<Integer> unique = new HashSet<Integer>();
unique.addAll(c);
for (Integer i : unique) {
    System.out.println(i);
}