/**
* Adds the edge {@code e} to the network.
* @param e the edge
* @throws IllegalArgumentException unless endpoints of edge are between
* {@code 0} and {@code V-1}
*/
public void addEdge(FlowEdge e) {
int v = e.from();
int w = e.to();
validateVertex(v);
validateVertex(w);
adj[v].add(e);
adj[w].add(e);
E++;
}
/**
* Initializes a flow edge from another flow edge.
* @param e the edge to copy
*/
public FlowEdge(FlowEdge e) {
this.v = e.v;
this.w = e.w;
this.capacity = e.capacity;
this.flow = e.flow;
}
/**
* Unit tests the {@code FlowEdge} data type.
*
* @param args the command-line arguments
*/
public static void main(String[] args) {
FlowEdge e = new FlowEdge(12, 23, 4.56);
StdOut.println(e);
}