Java 代码

import java.util.Scanner;
import java.util.List;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.Collections;

public class Main
{
    public static void main(String[] args)
    {
        Scanner cin = new Scanner(System.in);

        int n = cin.nextInt();

        List<Data>  l = new ArrayList<Data>();

        for (int i = 0; i < n; i ++)
        {
            Data d = new Data(cin.nextInt(), cin.nextDouble(), cin.nextLine());
            l.add(d);
        }

        Collections.sort(l, new Data());

        for (int i = 0; i < l.size();i++) 
        {             
            System.out.println(l.get(i));       
        }   

    }

    static class Data implements Comparator<Data>
    {
        int x = 0;
        double y = 0.0;
        String z = "";

        public Data()
        {

        }

        public Data (int x1, double y1, String z1)
        {
            x = x1;
            y = y1;
            z = z1;
        }

        public int getX()
        {
            return x;
        }

        public String toString()
        {
            return x + " " + String.format("%.2f", y) + z;
        }

        public int compare(Data obj1, Data obj2)
        {
            return obj1.getX() - obj2.getX();
        }
    }
}