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AdjacencyList.java
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AdjacencyList.java
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import java.util.*;
import java.io.*;
public class AdjacencyList {
private ArrayList<Vertex> list;
public AdjacencyList(String fileName) throws IOException{
if (fileName.equals("blank")){
list = new ArrayList<Vertex>();
} else {
list = new ArrayList<Vertex>();
readMap(fileName);
}
}
private void readMap(String fileName) throws IOException{
Scanner scan = new Scanner(new File(fileName));
while (scan.hasNextLine()){
String[] line = scan.nextLine().split(" ");
String name1 = line[0];
String name2 = line[1];
int weight = Integer.parseInt(line[2]);
if (getVertex(name1) == null){
list.add(new Vertex(name1));
}
if (getVertex(name2) == null){
list.add(new Vertex(name2));
}
ArrayList<Vertex> name1Friends = getVertex(name1).getFriends();
if (!name1Friends.contains(getVertex(name2))){
getVertex(name1).addFriend(getVertex(name2), weight);
}
ArrayList<Vertex> name2Friends = getVertex(name2).getFriends();
if (!name2Friends.contains(getVertex(name1))){
getVertex(name2).addFriend(getVertex(name1), weight);
}
}
}
public void resetFlags(){
for (Vertex x : list){
x.setFlag(false);
}
}
public Vertex getVertex(String name){
for (Vertex x : list){
if (x.getName().equals(name)){
return x;
}
}
return null;
}
public String toString(){
String toReturn = "";
for (Vertex x : list){
toReturn += x.getName() + " -> " + x + "\n";
}
return toReturn;
}
}