Load arrayList data into JTable

Question

I m trying to set items from a method called FootballClub and so far it s fine  but then I created an arrayList from it and I somehow can t find a way to store this information into a JTable  The problem is that i cant find a way to set a fixed number of rows  Here is my code   Class StartLeague   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               FootBall Club Class   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          The SportsClub Class abstract    abstract class SportsClub   int position  String name  int points  int wins  int defeats  int draws  int totalMatches  int goalF  int goalA  int goalD       And finally  LeagueManager  which is an interface   import java util ArrayList    public interface LeagueManager   ArrayList lt FootballClub gt  originalLeagueTable   new ArrayList lt FootballClub gt     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        Can somebody please help me  I ve trying and trying for days  Thank you

User · Answer

You probably need to use a TableModel  Oracle s tutorial here   How implements your own TableModel  public class FootballClubTableModel extends AbstractTableModel     private List lt FootballClub gt  clubs     private String   columns       public FootBallClubTableModel List lt FootballClub gt  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             You maybe need to override anothers methods of TableModel  depends on what you want to do  but here is the essential methods to understand and implements    Use it like this  List lt FootballClub gt  clubs   getFootballClub    TableModel model   new FootballClubTableModel clubs   JTable table   new JTable model     Hope it help

User · Answer

I created an arrayList from it and I somehow can t find a way to store this information into a JTable    The DefaultTableModel doesn t support displaying custom Objects stored in an ArrayList  You need to create a custom TableModel   You can check out the Bean Table Model  It is a reusable class that will use reflection to find all the data in your FootballClub class and display in a JTable   Or  you can extend the Row Table Model found in the above link to make is easier to create your own custom TableModel by implementing a few methods  The JButtomTableModel java source code give a complete example of how you can do this

User · Answer

Basic method for beginners like me  public void loadDataToJtable ArrayList lt String gt  liste                rows   table getRowCount         cols   table getColumnCount         for  int i   0  i  lt  rows   i                   for   int k    0  k  lt  cols   k                               for  int h   0  h  lt  list1 size    h                                       String b    list1 get h                   b   table getValueAt i  k  toString

User · Answer

You can do something like what i did with my List lt  Future lt  String     or any other Arraylist  Type returned from other class called PingScan that returns List  because it implements service executor  Anyway the code down note that you can use foreach and retrieve data from the List     PingScan p   new PingScan     List lt Future lt String gt  gt  scanResult   p checkThisIP jFormattedTextField1 getText    jFormattedTextField2 getText                     for  final Future lt String gt  f   scanResult                        try                           if  f get   instanceof String                                String ip   f get                                Object   data    ip                               tableModel addRow data                                                   catch  InterruptedException   ExecutionException ex                            Logger getLogger gui class getName    log Level SEVERE  null  ex

User · Answer

The problem is that i cant find a way to set a fixed number of rows    You don t need to set the number of rows  Use a TableModel  A DefaultTableModel in particular   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     Then you can add rows to the tableModel with an Object    Object   objs    1   Arsenal   35  11  2  2  15  30  11  19    tableModel addRow objs     You can loop to add your Object   arrays   Note  JTable does not currently allow instantiation with the input data as an ArrayList  It must be a Vector or an array   See JTable and DefaultTableModel   Also  How to Use JTable tutorial      I created an arrayList from it and I somehow can t find a way to store this information into a JTable     You can do something like this to add the data  ArrayList lt FootballClub gt  originalLeagueList   new ArrayList lt FootballClub gt      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  lt  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

[java] Load arrayList data into JTable

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