将数组列表数据加载到 JTable 中

java arraylist swing jtable grid-layout

2022-09-03 09:12:51

我正在尝试从调用的方法设置项目，到目前为止，它很好。但后来我从中创建了一个arrayList，不知何故，我找不到将此信息存储到JTable中的方法。问题是我找不到一种方法来设置固定的行数FootballClub

这是我的代码：

班级开始联赛：

import javax.swing.*;
import javax.swing.table.*;
import java.awt.*;

public class startLeague implements LeagueManager{

//setting the frame and other components to appear

public startLeague(){
    JButton createTeam = new JButton("Create Team");
    JButton deleteTeam = new JButton("Delete Team");

    JFrame frame = new JFrame("Premier League System");
    JPanel panel = new JPanel();
    frame.setSize(1280, 800);
    frame.setVisible(true);
    frame.add(panel);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    String col[] = {"Pos","Team","P", "W", "L", "D", "MP", "GF", "GA", "GD"};

    panel.setLayout(new GridLayout(20, 20));
    panel.add(createTeam);
    panel.add(deleteTeam);
    panel.add(new JLabel(""));
    //JLabels to fill the space
    }
    }

足球俱乐部类：

import java.util.ArrayList;



 public class FootballClub extends SportsClub{





   FootballClub(int position, String name, int points, int wins, int defeats, int draws, int totalMatches, int goalF, int goalA, int goalD){
   this.position = position;
   this.name = name;
   this.points = points;
   this.wins = wins;
   this.defeats = defeats;
   this.draws = draws;
   this.totalMatches = totalMatches;
   this.goalF = goalF;
   this.goalA = goalA;
   this.goalD = goalD;

   }

体育俱乐部类（摘要）：

abstract class SportsClub {
int position;
String name;
int points;
int wins;
int defeats;
int draws;
int totalMatches;
int goalF;
int goalA;
int goalD;

}

最后是 LeagueManager，这是一个接口：

import java.util.ArrayList;


public interface LeagueManager {
ArrayList<FootballClub> originalLeagueTable = new ArrayList<FootballClub>();
FootballClub arsenal = new FootballClub(1, "Arsenal", 35, 11, 2, 2, 15, 30, 11, 19);
FootballClub liverpool = new FootballClub(2, "Liverpool", 30, 9, 3, 3, 15, 34, 18, 16);
FootballClub chelsea = new FootballClub(3, "Chelsea", 30, 9, 2, 2, 15, 30, 11, 19);
FootballClub mCity = new FootballClub(4, "Man City", 29, 9, 2, 4, 15, 41, 15, 26);
FootballClub everton = new FootballClub(5, "Everton", 28, 7, 1, 7, 15, 23, 14, 9);
FootballClub tot = new FootballClub(6, "Tottenham", 27, 8, 4, 3, 15, 15, 16, -1);
FootballClub newcastle = new FootballClub(7, "Newcastle", 26, 8, 5, 2, 15, 20, 21, -1);
FootballClub south = new FootballClub(8, "Southampton", 23, 6, 4, 5, 15, 19, 14, 5);

}

有人可以帮我吗？我已经尝试了好几天了。谢谢。

答案 1

“问题是我找不到一种方法来设置固定数量的行”

您无需设置行数。使用 .特别是。TableModelDefaultTableModel

String col[] = {"Pos","Team","P", "W", "L", "D", "MP", "GF", "GA", "GD"};

DefaultTableModel tableModel = new DefaultTableModel(col, 0);
                                            // The 0 argument is number rows.

JTable table = new JTable(tableModel);

然后，您可以将行添加到具有tableModelObject[]

Object[] objs = {1, "Arsenal", 35, 11, 2, 2, 15, 30, 11, 19};

tableModel.addRow(objs);

您可以循环添加 Object[] 数组。

注意：JTable 当前不允许将输入数据实例化为 .它必须是或数组。ArrayListVector

请参阅 JTable 和 DefaultTableModel。另外，如何使用JTable教程

“我从中创建了一个arrayList，但我不知何故找不到将此信息存储到JTable中的方法。

您可以执行类似操作来添加数据

ArrayList<FootballClub> originalLeagueList = new ArrayList<FootballClub>();

originalLeagueList.add(new FootballClub(1, "Arsenal", 35, 11, 2, 2, 15, 30, 11, 19));
originalLeagueList.add(new FootballClub(2, "Liverpool", 30, 9, 3, 3, 15, 34, 18, 16));
originalLeagueList.add(new FootballClub(3, "Chelsea", 30, 9, 2, 2, 15, 30, 11, 19));
originalLeagueList.add(new FootballClub(4, "Man City", 29, 9, 2, 4, 15, 41, 15, 26));
originalLeagueList.add(new FootballClub(5, "Everton", 28, 7, 1, 7, 15, 23, 14, 9));
originalLeagueList.add(new FootballClub(6, "Tottenham", 27, 8, 4, 3, 15, 15, 16, -1));
originalLeagueList.add(new FootballClub(7, "Newcastle", 26, 8, 5, 2, 15, 20, 21, -1));
originalLeagueList.add(new FootballClub(8, "Southampton", 23, 6, 4, 5, 15, 19, 14, 5));

for (int i = 0; i < originalLeagueList.size(); i++){
   int position = originalLeagueList.get(i).getPosition();
   String name = originalLeagueList.get(i).getName();
   int points = originalLeagueList.get(i).getPoinst();
   int wins = originalLeagueList.get(i).getWins();
   int defeats = originalLeagueList.get(i).getDefeats();
   int draws = originalLeagueList.get(i).getDraws();
   int totalMatches = originalLeagueList.get(i).getTotalMathces();
   int goalF = originalLeagueList.get(i).getGoalF();
   int goalA = originalLeagueList.get(i).getGoalA();
   in ttgoalD = originalLeagueList.get(i).getTtgoalD();

   Object[] data = {position, name, points, wins, defeats, draws, 
                               totalMatches, goalF, goalA, ttgoalD};

   tableModel.add(data);

}

答案 2

您可能需要使用（此处为 Oracle 的教程）TableModel)

如何实现您自己的TableModel

public class FootballClubTableModel extends AbstractTableModel {
  private List<FootballClub> clubs ;
  private String[] columns ; 

  public FootBallClubTableModel(List<FootballClub> aClubList){
    super();
    clubs = aClubList ;
    columns = new String[]{"Pos","Team","P", "W", "L", "D", "MP", "GF", "GA", "GD"};
  }

  // Number of column of your table
  public int getColumnCount() {
    return columns.length ;
  }

  // Number of row of your table
  public int getRowsCount() {
    return clubs.size();
  }

  // The object to render in a cell
  public Object getValueAt(int row, int col) {
    FootballClub club = clubs.get(row);
    switch(col) {
      case 0: return club.getPosition();
      // to complete here...
      default: return null;
    }
  }

  // Optional, the name of your column
  public String getColumnName(int col) {
    return columns[col] ;
  }

}

你可能需要重写的另一种方法，这取决于你想做什么，但这里是理解和实现的基本方法:)像这样
使用它TableModel

List<FootballClub> clubs = getFootballClub();
TableModel model = new FootballClubTableModel(clubs);
JTable table = new JTable(model);

希望它有帮助！