src/com.example.portfolio3/com/example/portfolio3/Graph.java



package com.example.portfolio3;

// origin: <https://moodle.ruc.dk/course/section.php?id=211877>

import java.util.Collection;

/// foo
public interface Graph {

    /// foo
    /// @param v  foo
    /// @param u  foo
    /// @param w  foo
    void insertEdge(String v, String u, int w);

    /// foo
    /// @return Collection
    Collection<Vertex> vertices();

    /// foo
    /// @return Collection
    Collection<Edge> edges();

    /// foo
    /// @param v  foo
    /// @return   Collection
    Collection<Edge> outEdge(Vertex v);

    /// foo
    /// @param v1  foo
    /// @param v2  foo
    /// @return    Integer
    Integer getWeight(Vertex v1, Vertex v2);
}