如何使用BufferedReader.readLine（）。split（“”）Java？

Question

I have this code:

public static void opticFiberApplication() throws IOException {
    int v1;
    File file = new File("src/Arcos.txt");
    FileReader fr = new FileReader(file);
    BufferedReader br = new BufferedReader(fr);
    int capacity = Integer.parseInt(br.readLine());
    Graph application = new Graph(capacity);

    while ((v1 = Character.getNumericValue(br.read())) != -1) {
        int v2 = Character.getNumericValue(br.read());
        int cost = Character.getNumericValue(br.read());
        if (application.getVertex(v1) == null) application.addVertex(v1);
        if (application.getVertex(v2) == null) application.addVertex(v2);

        application.addEdge(v1, v2, cost);
    }
    printGraph(application);
    prim(application);
}

And the .txt Arcos

5
0110025032143238

Where the first line is the capacity and the second one are the vertex and the cost of the edge.

---

I want to know how to use BufferedReader.readLine().split(" ") so that Arcos.txt can be read like this

5
0 1 10 0 2 5 0 3 2 1 4 3 2 3 8

Thanks for your help.

Answer 1

I think you are confused as to what Split is.

public String[] split(String regex) - Splits this string around matches of the given regular expression. What you are looking for is this:

for (int i = 0;i < str.length(); i++){
    System.out.println(str.charAt(i));
}