How do I populate jtable from arrraylist object?

Question

I have data stored in array list object here :

    ArrayList<Long> itr= new ArrayList<Long>();
    ArrayList<Double> dub = new ArrayList<Double>();
    ArrayList<String> str = new ArrayList<String>();

I am able to print sample data with the below program how do I pass all the array list object data here? so that I can get array list data in jtable tabular column. I am only able to fetch individual values. How do I do it with for loop?

class ColoumnHeader extends JFrame 
{
public ColoumnHeader()
{
    super("Jtable Layout");
    setDefaultCloseOperation(EXIT_ON_CLOSE);
        String[] ColoumnHeaders={"Integers","RealNumbers","OtherTokens"};
    JTable table=new JTable(new Object[][]{{itr.get(1),dub.get(1),str.get(1)}},ColoumnHeaders);


            table.setPreferredScrollableViewportSize(new Dimension(500,80));

    JScrollPane pane = new JScrollPane(table);
    getContentPane().add(pane,BorderLayout.CENTER);
}
}
 public class asm
{
public static void main(String[] args)
 {
  ColoumnHeader c=new ColoumnHeader();
  c.setVisible(true);
 }
}

Possible duplicate of [How to populate a jTable from an ArrayList?](http://stackoverflow.com/questions/20012772/how-to-populate-a-jtable-from-an-arraylist). — Hovercraft Full Of Eels, Apr 13 '16 at 22:04
[Other similar questions](https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=how+to+populate+a+jtable+from+arraylist+site:http:%2F%2Fstackoverflow.com%2F) — Hovercraft Full Of Eels, Apr 13 '16 at 22:05
Recommendation 1: Get rid of the parallel ArrayLists as that's an invitation to disaster and a debugging nightmare. Instead create a class to hold the three (or more attributes) and then a single ArrayList, or better TableModel to hold a collection of objects of this class. — Hovercraft Full Of Eels, Apr 13 '16 at 22:06

score 2 · Accepted Answer · edited Apr 14 '16 at 10:33

2

Take the time to read the JavaDocs and tutorials as more often then not, the answer is easily available...

DefaultTableModel mod = (DefaultTableModel) table.getModel();
mod.addColumn("Long", itr.toArray(new Long[itr.size()]));
mod.addColumn("Double", dub.toArray(new Double[dub.size()]));
mod.addColumn("Strings", str.toArray(new String[str.size()]));

edited Apr 14 '16 at 10:33

wonderb0lt

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answered Apr 13 '16 at 22:51

MadProgrammer

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How do I populate jtable from arrraylist object?

1 Answers1