Edge.java

package GPL;

import java.util.LinkedList;

// *************************************************************************

public class Edge extends Neighbor implements EdgeIfc {
    private  Vertex start;

    public void EdgeConstructor( Vertex the_start,
                      Vertex the_end ) {
        start = the_start;
        end = the_end;
    }

    // dja: fix compile error.
//    public void adjustAdorns( Edge the_edge ) {}
    public void adjustAdorns( EdgeIfc the_edge ) {}


    // dja: fix compile error.
    public void setWeight(int weight){}
    public int getWeight() { return 0; }

    public Vertex getOtherVertex(Vertex vertex)
    {
        if(vertex == start)
            return end;
        else if(vertex == end)
            return start;
        else
            return null;
    }

    public Vertex getStart()
    {
        return start;
    }

    public Vertex getEnd()
    {
        return end;
    }

    public void display() {
        System.out.println( " start=" + start.getName() + " end=" + end.getName() );
    }
}