从文本文件读取，但只存储特定部分

Question

File file;
            file = new File("CarInfo.txt");

            try (Scanner sc = new Scanner(file)) {
    while (sc.hasNext()) {
        String carTab = sc.next();
        // Looking for tag 'Car'
        if (!carTab.equals("Car:")) continue;

        if (!sc.hasNext()) {
            break;
        }

        String car = sc.next();
        if (!sc.hasNextInt()) {
            continue;
        }
        int x = sc.nextInt();
        if (!sc.hasNextInt()) {
            break;
        }
        int y = sc.nextInt();
        System.out.println(car + " " + x + " " + y);
    }



} catch (FileNotFoundException e) {
    System.out.println("File not found");
}

从代码（李克强）收到的错误：

Exception in thread "AWT-EventQueue-0" java.util.InputMismatchException
    at java.util.Scanner.throwFor(Scanner.java:864)
    at java.util.Scanner.next(Scanner.java:1485)
    at java.util.Scanner.nextDouble(Scanner.java:2413)
    at traingui.code.TrainGui$1.run(TrainGui.java:37)
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
    at java.awt.EventQueue.access$500(EventQueue.java:97)
    at java.awt.EventQueue$3.run(EventQueue.java:709)
    at java.awt.EventQueue$3.run(EventQueue.java:703)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

Answer 1

您可以为stations创建另一个对象，然后将每个stations对象存储在ArrayList中，该ArrayList中包含读取代码的文件：

站对象

public class Station {

    private String name;
    private ArrayList<Double> coords;

    public Station(String name, ArrayList<Double> coords){
        this.name = name;
        this.coords = coords;
    }

}

您的代码已修改

    File file = new File("StationInfo.txt");
    Scanner sc = new Scanner(file);
    ArrayList<Station> stationObj = new ArrayList<>();
    ArrayList<Double> temp = new ArrayList<>();
    String stationName = "";

    while (sc.hasNext()) {
        String token = sc.next();

        if (!token.trim().equalsIgnoreCase("Station:")) {     
            try{
                temp.add(Double.parseDouble(token));
            } catch (Exception e){
                stationName = token;
            }
        }

        // The below will work for when you have 1 coordinate or both coordinates.

        if(!stationName.equals("") && !stationName.equalsIgnoreCase("Station:") && !temp.isEmpty() && (!sc.hasNextDouble() || !sc.hasNextInt())){
            stationObj.add(new Station(stationName, temp));
            temp = new ArrayList<>();
            stationName = "";
        }

    }