Java 使用 Map 集合实现地铁站查询系统

import java.util.HashMap; import java.util.Map; import java.util.Scanner;

public class TrainStation { public static void main(String[] args) { Map<String, Integer> stationMap = new HashMap<String, Integer>(); stationMap.put('机场站', 1); stationMap.put('西流湖', 2); stationMap.put('青山湖', 3); stationMap.put('红谷滩', 4); stationMap.put('卧龙山', 5); stationMap.put('医学院', 6);

    Scanner scanner = new Scanner(System.in);

    String startStation;
    do {
        System.out.println('请输入上车站：');
        startStation = scanner.nextLine();
        if (!stationMap.containsKey(startStation)) {
            System.out.println('您输入的上车站：' + startStation + '不存在，请重新输入上车站：');
        }
    } while (!stationMap.containsKey(startStation));

    String endStation;
    do {
        System.out.println('请输入到达站：');
        endStation = scanner.nextLine();
        if (!stationMap.containsKey(endStation)) {
            System.out.println('您输入的到达站：' + endStation + '不存在，请重新输入到达站：');
        }
    } while (!stationMap.containsKey(endStation));

    int startStationIndex = stationMap.get(startStation);
    int endStationIndex = stationMap.get(endStation);
    int stationCount = endStationIndex - startStationIndex;
    int fee = stationCount * 1;
    int duration = stationCount * 2;

    System.out.println('从' + startStation + '到' + endStation + '经过' + stationCount + '站收费' + fee + '元，大约需要' + duration + '分钟');
}

}