fibonacci iterator (find next term of sequence on-the-go)

import java.util.Iterator;

public class Fibonacci implements Iterator<Integer> {
    private int curr = 1, prev = 0;

    @Override
    public boolean hasNext() {
        return prev < Integer.MAX_VALUE / 2;
    }

    @Override
    public Integer next() {
        int tmp = prev;
        prev = curr;
        return curr += tmp;
    }
}