2023.11.3每日总结

import java.util.*;
import java.io.*;

public class Subway {
    private Map<String, Set<String>> lines; // 存储地铁线路信息
    private Map<String, Set<String>> stations; // 存储地铁站点信息

    public Subway() {
        lines = new HashMap<>();
        stations = new HashMap<>();
    }

    // 从文件中读取地铁线路信息
    public void loadFromFile(String filename) {
        try {
            FileReader reader = new FileReader(filename);
            BufferedReader br = new BufferedReader(reader);
            String line = null;
            while ((line = br.readLine()) != null) {
                String[] fields = line.split("\\|");
                String lineName = fields[0];
                String[] stations = fields[1].split(" ");
                Set<String> stationsSet = new HashSet<>(Arrays.asList(stations));
                lines.put(lineName, stationsSet);
                for (String station : stations) {
                    Set<String> linesSet = this.stations.get(station);
                    if (linesSet == null) {
                        linesSet = new HashSet<>();
                    }
                    linesSet.add(lineName);
                    this.stations.put(station, linesSet);
                }
            }
            br.close();
            reader.close();
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }

    // 打印所有的地铁线路信息
    public void print() {
        for (String line : lines.keySet()) {
            System.out.print(line + ": ");
            Set<String> stations = lines.get(line);
            for (String station : stations) {
                System.out.print(station + " ");
            }
            System.out.println();
        }
    }
}

// 在主程序中调用Subway类来导入地铁线路信息并展示在界面上
public class MainActivity extends AppCompatActivity {

    private Subway subway;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        subway = new Subway();
        subway.loadFromFile("beijing_subway.txt");
        subway.print();

        // 将地铁线路信息展示在界面上
        // ...
    }
}