我想创建一个邻接矩阵，但是当我得到边开始和结束的点时，我在使用泛型类型时遇到了问题。我无法使用列表中的边 Vertex 我买了一个开箱即用的类，我创建了一个 edgeList 我自己。
此方法返回邻接矩阵：

public int[][] adjacencyMatrix() {
    int[][] adjacencyMatrix = new int[vertices.size()][vertices.size()];

    int startVertex;
    int endVertex;
    ArrayList<Edge> edgeList = new ArrayList<Edge>();
    for (int i = 0; i < vertices.size(); i++) {
        Edge currentEdge = edgeList.get(i);
        startVertex = currentEdge.from;  // <<==
        endVertex = currentEdge.to;      // <<==
        adjacencyMatrix[startVertex][endVertex] = 1;
    }
    return adjacencyMatrix;
}
``` `Edge` 班级：

public class Edge {
Vertex from; // from which vertex the edge comes from
Vertex to; // shows which vertex goes to
int weight;

public Edge(Vertex<T> from, Vertex<T> to) {
    this.from = from;
    this.to = from;
    weight = 1;
}

public Edge(Vertex<T> from, Vertex<T> to, int weight) {
    this.from = from;
    this.to = from;
    this.weight = weight;
}

}
``` Vertex 班级：

public class Vertex<T> {
    public T value; // storing value
    public List<Edge<T>> edges; // keeps edge list

    public Vertex(T value) {
        this.value = value;
        edges = new ArrayList<>();
    }
}