Consider the following class: public class Sequence { private int [] values; public Sequence(int size) { values = new int[size]; } public void set(int i, int n) { values [i] = n; } public int get(int i) { return values [i]; } public int size() { return values.length; } } Add a method: public boolean equals(Sequence other) That checks whether two sequences have the same values in the same order.