Create JTable from ArrayList

Question

Now that I managed to put the objects from a file into a ArrayList, I have to display them into a JTable.

These are the 3 objects contained in

Answer 1

Use a TableModel for showing data in the JTable. For Example:

In UI class, set the table model to the table.

JTable table = new JTable(new MonModel());

Table Model class

class MonModel extends AbstractTableModel {

    private List<LatNLon> l;
    private String[] columnNames = {"Longitude", "Latitude"};

    public MonModel() {
        l = new ArrayList<LatNLon>();

        l.add(new LatNLon("45.573715", "-73.900295"));
        l.add(new LatNLon("45.573715", "-73.900295"));
        l.add(new LatNLon("45.573715", "-73.900295"));
    }

    @Override
    public String getColumnName(int column) {
        return columnNames[column];
    }

    public int getColumnCount() {
        return 2;
    }

    public int getRowCount() {
        return l.size();
    }

    public Object getValueAt(int rowIndex, int columnIndex) {
        if(columnIndex==0){
            return l.get(rowIndex).getX();
        }
        else if(columnIndex==1){
            return l.get(rowIndex).getY();
        }
        return null;
    }
}

Latitude and Longitude class.

class LatNLon {
    private String x;
    private String y;

    public LatNLon(String x, String y) {
        this.x = x;
        this.y = y;
    }
// Code: For Getters and Setters.
}

Also read How to use Tables.

Answer 2

Use your TableModel to create a JTable and add it to a JFrame. Also consider overriding getColumnName(), as shown here. See also How to Use Tables.

MonModel model = new MonModel();
JTable table = new JTable(model);
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(new JScrollPane(table), BorderLayout.CENTER);
f.pack();
f.setLocationByPlatform(true);
f.setVisible(true);