public class Edge implements Comparable<Edge>{

	private int first_vertex;
	private int second_vertex;
	private double weight;

	/**
	 * Constructor for this class
	 *
	 * @param first  Serves as name of a vertex of this edge
	 * @param second Serves as name of other vertex of this edge
	 * @param weight Weight of this edge
	 */
	public Edge(int first, int second, double weight) {
		this.first_vertex = first;
		this.second_vertex = second;
		this.weight = weight;
	}

	/**
	 * Method overridden for purposes of this class - used to compare weight of this instance to
	 * weight of another instance of this class
	 *
	 * @param Edge to compare weight against
	 * @return Integer indicating relationship between edge weights compared
	 */
	@Override
	public int compareTo(Edge other) {
		if (this.getWeight() < other.getWeight()) {
			return -1;
		} else if (this.getWeight() > other.getWeight()){
			return +1;
		} else {
			return 0;
		}
	}

	/**
	 * Getter for name of first vertex of the edge
	 *
	 * @return Integer name of edge's first (arbitrary) vertex
	 */
	public int getFirstVertex() {
		return this.first_vertex;
	}

	/**
	 * Getter for name of edge's other vertex
	 *
	 * @return Integer name of edge's other (arbitrary) vertex
	 */
	public int getSecondVertex() {
		return this.second_vertex;
	}

	/**
	 * Getter for this edge's weight
	 *
	 * @return Weight of the edge
	 */
	public double getWeight() {
		return this.weight;
	}

}