Table like java data structure

Question

I need to implement some kind table-like data structure that stores info like this in Java:

+--------+-------+-----+
|  sij   |   i   |  j  |
+--------+-----         


        

Answer 1

Read the section from the Swing tutorial on How to Use Tables. The tutorial shows how to create a table as well as how to add sorting capability to the table.

If you only need to store the data but not display it, then you can use a 2-dimensional array or a List of Lists. Then you can use the Column Comparator to do the sorting.

Edit: added code demonstrating use of the ColumnComparator

import java.util.*;

public class SortSIJ
{
    public static void main(String args[])
    {
        Object[] data = new Object[4];
        data[0] = new Integer[] {45, 5, 7};
        data[1] = new Integer[] {33, 1, 6};
        data[2] = new Integer[] {31, 0, 9};
        data[3] = new Integer[] {12, 8, 2};

        ColumnComparator cc = new ColumnComparator(0);
//      cc.setAscending( false );

        Arrays.sort(data, cc);

        for (Object row: data)
        {
            Integer[] theRow = (Integer[])row;
            System.out.println( Arrays.asList(theRow) );
        }
    }
}

I also agree with the suggestion to create an Object to store the 3 variables. In this case you can use the BeanComparator which can be found at the above link.