java - 根据长数组的顺序更改字符串数组的顺序

Question

基本上，我正在尝试进行高分显示，比较名称和时间(越快越好)。我获取时间数组，并根据值(从小到大)对它们进行排序。然后我希望根据时间重新排列名称，但我在这方面遇到了麻烦。

所以基本上，我希望输入是这样的:

John--8
Sally--5
James--2
Fred--4

输出为:

James--2
Fred--4
Sally--5
John--8

目前，输出为:

John--2
Sally--4
James--5
Fred--8

这是我的代码(注意:您需要 these text documents ):

//not actually sure which of these import statements are really necessary, lol
import java.awt.BorderLayout;
import java.awt.Container;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.*;
import java.util.Vector;

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.Canvas;
import javax.swing.JFrame;
import java.awt.Dimension;
import java.io.*;

import java.util.Arrays;

class HallOfFame extends JFrame implements ActionListener 
{

    private static final int FRAME_WIDTH    = 300;
    private static final int FRAME_HEIGHT   = 350;

    int numberOfRows=20;

    String[] name = new String[100];
    String[] time = new String[100];

    //long[] longArrayTime = new long[100];

    String[] saneTime = new String[100];

    /*it's been a */long[] longTime = new long[100];

    long second;
    long minute;
    long hour;
    long miliseconds;
    //Declare your objects here...

    public static void main(String[] args) 
    {
        HallOfFame frame = new HallOfFame();  
        frame.setVisible(true); // Display the frame
    }

    @SuppressWarnings("unchecked")  //without this line, a warning appears. i can find no need for it and it's annoying, so i got rid of it :P (It is in relation to the table)
    public HallOfFame( ) 
    {  

        try 
        {
            File inFile= new File("names.txt");
            FileReader fileReader= new FileReader(inFile);
            BufferedReader bufReader = new BufferedReader(fileReader);

            for(int i=0; i<100; i++)
            {
                name[i]=bufReader.readLine();

            }
            bufReader.close();

        }
        catch(IOException tada)
        {
            JOptionPane.showMessageDialog(null, "Error loading high scores. Please ensure file system is accesible, and that 'name.txt' exists");
        }

        try 
        {
            File inFile= new File("times.txt");
            FileReader fileReader= new FileReader(inFile);
            BufferedReader bufReader = new BufferedReader(fileReader);

            for(int i=0; i<100; i++)
            {
                time[i]=bufReader.readLine();

            }
            bufReader.close();

        }
        catch(IOException tada)
        {
            JOptionPane.showMessageDialog(null, "Error loading high scores. Please ensure file system is accesible, and that 'name.txt' exists");
        }

        //finished reading scores
        for(int i=0;i<100;i++)
        {
            if(time[i]==null||time[i].equals(("0")))
            {
                time[i]="3699989"; //a very large value so that non-existant values are at the end of a sorted array
            }

            longTime[i] = Long.parseLong(time[i]);
        }
        Arrays.sort(longTime);


        for(int i=0;i<100;i++)
        {
            second = (longTime[i] / 1000) % 60;
            minute = (longTime[i] / (1000 * 60)) % 60;
            hour = (longTime[i] / (1000 * 60 * 60)) % 24;
            miliseconds = Long.parseLong((""+longTime[i]).substring(0,2));

            saneTime[i] = String.format("%02d:%02d:%d", minute, second, miliseconds);
        }

        // set the frame properties
        setTitle("High Scores");
        setSize(FRAME_WIDTH, FRAME_HEIGHT);
        setLocationRelativeTo(null);
        setResizable(false);
        Image icon = new ImageIcon("trophy.png").getImage();   //why does this not work????
        setIconImage(icon);

        Object columns[] = { "Rank", "Time", "Name" };
        DefaultTableModel model = new DefaultTableModel(columns, 0);

        for(int i=0;i<numberOfRows;i++)
        {
            if(time[i]=="3699989")//stop adding scores when array is empty (this large number is "empty" as 0 is defined to it above to make sorting the array work)
            {
                break;
            }
            Vector row = new Vector(numberOfRows);
            row.add((i+1));
            //row.add(time[i]);
            row.add(saneTime[i]);
            row.add(name[i]);
            model.addRow( row );
        }

        // set the content pane properties
        Container contentPane = getContentPane();   
        contentPane.setLayout(new GridLayout());
        contentPane.setBackground(Color.white);

        JTable table = new JTable( model );
        JScrollPane scrollPane = new JScrollPane(table);
        contentPane.add(scrollPane, BorderLayout.CENTER);

        for(int i=0;i<numberOfRows;i++)
        {
            table.setRowHeight(i, 30);
        }

        //create and place items frame's content pane

        // register 'Exit' upon closing as default close operation
        setDefaultCloseOperation(EXIT_ON_CLOSE);
    }

    public void actionPerformed(ActionEvent event) // Actions
    {      
        JButton clickedButton = (JButton) event.getSource();        

    }   
} 

Answer 1

创建一个具有名称和时间作为属性的类

public class Highscore {
    private String name;
    private long time;
    public Highscore(String name, long time) {
        this.name = name;
        this.time = time;
    }
    public String getName() {
        return this.name;
    }
    public long getTime() {
        return this.time;
    }
}

然后将所有 Highscore 对象放入一个集合中。例如:ArrayList 并使用 Comparator 对这些对象进行排序。

Collections.sort(highscores, new Comparator<Highscore>() {
    @Override
    public int compare(Highscore hs1, Highscore hs2) {
        return Long.compare(hs1.getTime(), hs2.getTime());
    }
});

或者按照 @Andreas 的建议，如果您使用的是 Java 8，则可以使用缩短的表达式对 ArrayList 进行排序:

highscores.sort(Comparator.comparing(Highscore::getTime))