1
我已经定义了一个自定义边和顶点类型以用于无向稀疏图。问题是图形添加了我不想要的多条边。例如,考虑下面的代码:JUNG - 自定义边和顶点问题
UndirectedSparseGraph<Vertex, Edge> graphX = new UndirectedSparseGraph<Vertex, Edge>();
graphX.addEdge(new Edge("1#2"), new Vertex("1"), new Vertex("2"));
graphX.addEdge(new Edge("1#2"), new Vertex("1"), new Vertex("2"));
graphX.addEdge(new Edge("2#1"), new Vertex("2"), new Vertex("1"));
graphX.addEdge(new Edge("1#3"), new Vertex("1"), new Vertex("3"));
graphX.addEdge(new Edge("1#4"), new Vertex("1"), new Vertex("4"));
我有意加入的两个相似的边缘(第一的)。我已经为我创建的两个类(即Edge和Vertex)重写了一个equals方法,但是该图假定边的顶点是不同的,并添加了所有这些边。 下面是输出:
Vertices:1,4,1,1,2,1,1,2,2,3
Edges:1#3[1,3] 1#4[1,4] 1#2[1,2] 1#2[1,2] 2#1[2,1]
那么,我究竟做错了什么?
PS。 FYI这里是我创建的类:
public class Vertex {
private String id;
//More info in the future
public Vertex(String id){
this.id = id;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
@Override
public boolean equals(Object obj){
return ((Vertex) obj).id.equals(this.id);
}
@Override
public String toString(){
return this.id;
}
}
public class Edge {
private String id;
private double weight;
public Edge(String id, double weight){
this.id = id;
this.weight = weight;
}
public Edge(String id){
this.id = id;
this.weight = -1;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public double getWeight() {
return weight;
}
public void setWeight(double weight) {
this.weight = weight;
}
@Override
public boolean equals(Object obj){
return ((Edge) obj).id.equals(this.id);
}
@Override
public String toString(){
return this.id;
}
}