How can i add rows to a JTable at run time ??????

Question

hi there
how can i add a row to a JTable at run time? and display the table after the change? thank you.

Answer 1

For adding or removing the rows from the JTable, you have to use the methods on the table model. I would show you a simple implementation of table model.
public class MyTableModel extends AbstractTableModel {
private ArrayList rowsList = null;
private String [] columns = { "Column 1" , "Column 2", "Column 3"};
public MyTableModel() {
rowsList = new ArrayList();
public int getRowCount() {
return rowsList.size();
public int getColumnCount() {
return columns.length;
public void addRow(MyRow myRow) {
//MyRow is any of your object.
rowsList.add(myRow);
fireTableDataChanged();
public void removeRow(int rowIndex) {
rowsList.remove(rowIndex);
fireTableRowsDeleted(rowIndex, rowIndex);
public Object getValueAt(int row, in col) {
MyRow currentRow = (MyRow)rowsList.get(row);
switch (col) {
case 0:
//return the value of first cell
break;
case 1 :
//return the value of second cell
break;
case 2 :
//return the value of third cell
break;
}Then create the table using the TableModel using the constructor new JTable(TableModel) and then when you want to add/remove a row from the table, call myTableModel.addRow(MyRow) or myTableModel.removeRow(rowIndex)....I hope that this solves your problem.