JTable - load multidimensional array into table

Question

I've been trying to load my array into a JTable object with no luck. So here is my array:

int[][] board = {
    {0, 0, 0, 0, 2, 0, 0, 0, 0},
    {0, 0, 5, 0, 0, 0, 0, 2, 4},      
    {1, 0, 0, 4, 0, 0, 0, 3, 8},
    {0, 0, 0, 6, 0, 0, 0, 0, 7},
    {0, 0, 4, 5, 3, 8, 9, 0, 0},
    {8, 0, 0, 0, 0, 7, 0, 0, 0},
    {7, 4, 0, 0, 0, 6, 0, 0, 1},
    {6, 1, 0, 0, 0, 0, 3, 0, 0},
    {0, 0, 0, 0, 9, 0, 0, 0, 0}

I went to http://docs.oracle.com/javase/tutorial/uiswing/components/table.html And there is no constructor for putting int arrays, but there is for subject.

Anyone know a method, thanks!

Try this: docs.oracle.com/javase/6/docs/api/javax/swing/…, java.lang.Object[]) — Lews Therin
– Lews Therin, Commented Oct 30, 2012 at 12:13

Keppil · Accepted Answer · 2012-10-30 12:11:30Z

2

You could do something like this:

Integer[][] board = new Integer[][]{
        {0, 0, 0, 0, 2, 0, 0, 0, 0},
        {0, 0, 5, 0, 0, 0, 0, 2, 4},      
        {1, 0, 0, 4, 0, 0, 0, 3, 8},
        {0, 0, 0, 6, 0, 0, 0, 0, 7},
        {0, 0, 4, 5, 3, 8, 9, 0, 0},
        {8, 0, 0, 0, 0, 7, 0, 0, 0},
        {7, 4, 0, 0, 0, 6, 0, 0, 1},
        {6, 1, 0, 0, 0, 0, 3, 0, 0},
        {0, 0, 0, 0, 9, 0, 0, 0, 0}};

new JTable(board, new String[]{"columnName1"...});

answered Oct 30, 2012 at 12:11

Keppil

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Comments

Daniel Mühlbachler-P. · Accepted Answer · 2012-10-30 12:14:04Z

2

I see two possibilities here: zou can use Integer[][] instead of int[][] which can be casted to Object[][] and this will work with a JTable OR you can write your own data model.

Depending on what you want to achieve in the end you should choose the more appropriate one.

answered Oct 30, 2012 at 12:14

Daniel Mühlbachler-P.

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Comments

OschtärEi · Accepted Answer · 2012-10-30 12:14:19Z

1

Just try changing the int array to an Integer array

answered Oct 30, 2012 at 12:14

OschtärEi

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Comments

Jericho · Accepted Answer · 2012-10-30 12:16:50Z

Please try this

import javax.swing.*;
import java.awt.*;
public class JTableComponent{
  public static void main(String[] args) 
{
  new JTableComponent();
  }

  public JTableComponent(){
  JFrame frame = new JFrame("Creating JTable Component Example!");
  JPanel panel = new JPanel();
  Integer[][] board = {
            {0, 0, 0, 0, 2, 0, 0, 0, 0},
            {0, 0, 5, 0, 0, 0, 0, 2, 4},      
            {1, 0, 0, 4, 0, 0, 0, 3, 8},
            {0, 0, 0, 6, 0, 0, 0, 0, 7},
            {0, 0, 4, 5, 3, 8, 9, 0, 0},
            {8, 0, 0, 0, 0, 7, 0, 0, 0},
            {7, 4, 0, 0, 0, 6, 0, 0, 1},
            {6, 1, 0, 0, 0, 0, 3, 0, 0},
            {0, 0, 0, 0, 9, 0, 0, 0, 0}};

   String col[] = {"1","2","3","4","5","6","7","8","9"};
  JTable table = new JTable(board,col);
  panel.add(table,BorderLayout.CENTER);

frame.add(panel);
  frame.setSize(800,500);
  frame.setVisible(true);
  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  }

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