我无法为 getLines 方法打印，我在这里做错了吗？当我运行程序时它没有给我任何错误，但是当我尝试打印 getlines 方法时，它给了我错误。
当我尝试打印 getlines 方法时，它给了我这个错误。线程“main”中的异常 java.lang.ArrayIndexOutOfBoundsException: 1 在 dijkstra.Fileprocess.getLines(Fileprocess.java:37) 在 dijkstra.Fileprocess.main(Fileprocess.java:70)
public class Fileprocess {
public static Scanner Reader(String FileName){
//Pass a File Name to this method, then will return Scanner for reading data from that file
try {
return new Scanner(new File(FileName));
} catch (FileNotFoundException ex) {
ex.printStackTrace();
System.exit(1);
return null;
}
}
static ArrayList<Edge> getLines(ArrayList<Vertex> PointCollection) {
Scanner Input = Reader(Vertex.graph);
ArrayList<Edge> result = new ArrayList<Edge>();
while(Input.hasNext()){
String line = Input.nextLine();
String[] arr = line.split(" ");
result.add(new Edge(Integer.parseInt(arr[0]), //index
getPointbyIndex(PointCollection,Integer.parseInt(arr[1])), //start
getPointbyIndex(PointCollection,Integer.parseInt(arr[2])), //end
Integer.parseInt(arr[3]))); //cost
}
Input.close();
return result;
}
static ArrayList<Vertex> getPoints() {
Scanner Input = Reader(Vertex.airports);
ArrayList<Vertex> result = new ArrayList<Vertex>();
while(Input.hasNext()){
String line = Input.nextLine();
result.add(new Vertex(line));
}
Input.close();
return result;
}
static Vertex getPointbyIndex(ArrayList<Vertex>PointCollection, int Index){
for(Vertex p:PointCollection){
if(p.getIndex() == Index){
return p;
}
}
return null;
}
public static void main(String[] args){
System.out.println(getPoints());
System.out.println(getLines(null));
}
}
这是输入文本文件的文件（索引，开始，结束，成本）
1 1 2 2
2 1 3 1
3 1 6 3
4 1 7 3
5 2 1 2
6 2 3 1
7 2 4 1
8 2 5 2
9 2 6 2
10 3 1 1
11 3 2 1
12 3 4 1
class Edge {
public Vertex start;
public Vertex end;
public double cost;
public int Index;
// public final Vertex target;
// public final int weight;
public Edge(double cost, Vertex end, Vertex start, int Index){
this.start = start;
this.end = end;
this.cost = cost;
this.Index = Index;
}
public String toString(){
String result = "";
if(this.start != null && this.end != null){
result = this.Index +","+this.start.Index+","+this.end.Index +","+this.cost;
}
return result;
}
}