I can't get ArrayList to work in my JTable

Question

I want to be able to dynamically add and remove data (and rows) from my JTable, and so I wanted to just Lists when I implemented it. I've tried 2 ways and they both didn't work. Can someone show me some sample code to do this?
I tried 2 different methods:
method 1:
JTable Data_Table = new  JTable(data_Vector, Collumn_Names_Vector);when I started the applet I got an error saying Applet init error
But the error could also have happened in 2 other places here. 1, I created 2 Lists instead of Vectors and converted them to Vectors when passing them to JTable using:
new Vector(data)
and 2, I may have created my 2 dimensional data List incorrectly. I tried:
List Parent = new ArrayList();
List child1 = new ArrayList();
List child2 = new ArrayList();
child1.add(data1)
child2 ...
Parent.add(child1)
Parent.add(child2)and I tried:
List Parent = new ArrayList();
Object[] temp = { new Integer(); new Integer()};
Parent.add(temp.asList);But as I said method 1 did not work.
method 2:
I tried creating my own TableModel.
In this way, the applet would start, and I can see my collumn names, but the data is blank and all cells are invisible or nonexistent, I don't know which. How do I initialize the Table values? I'd like to have one row with all 0's when the Applet opens? I'd also like to see a row so I can edit it.
then I used this code (inside my model):
        public int getColumnCount() {
            return Analog_columnNames.length;
        public int getRowCount() {
            return Analog_data.size();
        public String getColumnName(int col) {
            return Analog_columnNames[col];
        public Object getValueAt(int row, int col) {
            java.util.List aRow = (ArrayList)Analog_data.get(row);
         return  aRow.get(col);
        public void setValueAt(Object value, int row, int col) {
            if (getValueAt(0,col) instanceof Integer                       
                    && !(value instanceof Integer)) {                 
                try {
                     java.util.List tmp =  (java.util.List) Analog_data.get(row);
              tmp.set(col, (Object)new Integer(value.toString()));
              fireTableCellUpdated(row, col);
                } catch (NumberFormatException e) {
            } else {
                 java.util.List tmp =  (java.util.List) Analog_data.get(row);
          tmp.set(col, (Object)new Integer(value.toString()));
                fireTableCellUpdated(row, col);
        }Analog_columnNames is a normal array

Answer 1

this may help You have to remove the button from the columns
otherwise You need som other classes.
       jTable1.addextrarowtotable(Name, aantal , prijs);CopyCalcTable.java
import javax.swing.*;
import java.util.Vector;
import javax.swing.table.*;
import java.text.DecimalFormat;
public class CopyCalcTable extends JTable{
    protected CopyCalcTableModel model;
    CopyCalcTable(){
        super();
        Vector columns= new Vector();
        columns.add("Type");
        columns.add("Omschrijving");
        columns.add("P/S");
        columns.add("Aantal");
        columns.add("Prijs");
        columns.add("Verwijderen");
        model = new CopyCalcTableModel(columns,1);
        setModel(model);
    public void setColumSize(){
        TableColumn column;
        int width = getWidth();
        column = getColumnModel().getColumn(0);
        column.setResizable(false);
        column.setMinWidth((width*2)/14);
        column.setPreferredWidth((width*2)/14);
        column = getColumnModel().getColumn(1);
        column.setResizable(false);
        column.setMinWidth((width*6)/12);
        column.setPreferredWidth((width*2)/14);
        column = getColumnModel().getColumn(2);
        column.setMinWidth((width*1)/14);
        column.setResizable(false);
        column.setPreferredWidth((width*1)/14);
        column = getColumnModel().getColumn(3);
        column.setResizable(false);
        column.setMinWidth((width*1)/14);
        column.setPreferredWidth((width*1)/14);
        column = getColumnModel().getColumn(4);
        column.setResizable(false);
        column.setMinWidth((width*1)/14);
        column.setPreferredWidth((width*1)/14);
        column = getColumnModel().getColumn(5);
        column.setResizable(false);
        column.setMinWidth((width*2)/14);
        column.setPreferredWidth((width*2)/14);
    public void HideColum(){
        TableColumn column;
        int width = getWidth();
        column = getColumnModel().getColumn(0);
        column.setResizable(false);
        column.setMinWidth((width*2)/14);
        column.setPreferredWidth((width*2)/14);
        column = getColumnModel().getColumn(1);
        column.setResizable(false);
        column.setMinWidth((width*6)/12);
        column.setPreferredWidth((width*2)/14);
        column = getColumnModel().getColumn(2);
        column.setMinWidth((width*1)/14);
        column.setResizable(false);
        column.setPreferredWidth((width*1)/14);
        column = getColumnModel().getColumn(3);
        column.setResizable(false);
        column.setMinWidth((width*1)/14);
        column.setPreferredWidth((width*1)/14);
        column = getColumnModel().getColumn(4);
        column.setResizable(false);
        column.setMinWidth((width*1)/14);
        column.setPreferredWidth((width*1)/14);
        column = getColumnModel().getColumn(5);
        column.setResizable(false);
        column.setMinWidth(0);
        column.setPreferredWidth(0);
    public void removefirstrow(){
        model.removeRow(0);
    public void removeTotalrow(){
        model.removeRow(model.getRowCount()-1);
    public void addTotalrow(){
        Vector data;
        String Col_Bediening = "";
        String Col_Uitboek ="";
        String Col_Rectoverso="";
        String Col_Formaat="";
        String Col_Kleur="";
        String Col_Gewicht="";
        Double Col_PS;
        String Col_Aantal;
        Double Col_Prijs;
        data = new Vector();
        Col_Prijs = new Double("0.00");
        double totaal= Col_Prijs.doubleValue();
        // number of extra's
        java.text.NumberFormat nf =  java.text.NumberFormat.getInstance();
        // set whether you want commas (or locale equivalent) inserted
        nf.setGroupingUsed(true );
        // set how many places you want to the right of the decimal.
        nf.setMinimumFractionDigits(2 );
        nf.setMaximumFractionDigits(2 );
        // set how many places you want to the left of the decimal.
        nf.setMinimumIntegerDigits(1 );
        int rows = model.getRowCount();
        for (int i = 0;i < rows; i++){
            Double d = new Double((String) model.getValueAt(i, 4));
            totaal += d.doubleValue();
        Col_Prijs = new Double(totaal*1.00);
        data.add("Totaal : EUR");
        data.add("");
        data.add(new String(""));
        data.add("");
        data.add(nf.format(Col_Prijs));
        //data.add(Col_Prijs.toString());
        javax.swing.JButton button = new javax.swing.JButton("EUR");
        data.add(button);
        model.addRow(data);
        setColumSize();
    public void addkopierowtotable(Integer aantal, double prijs, String omschrijving){
        Vector data;
        CopyCalcTableModel model = (CopyCalcTableModel) getModel();
        Double Col_PS;
        String Col_Aantal;
        Double Col_Prijs;
        //model.addColumn("Verwijderen");
        data = new Vector();
        Col_PS = new Double(prijs);
        Col_Aantal = new String(aantal.toString());
        Col_Prijs = new Double(prijs*aantal.intValue());
        data.add("Kopie�n");
        data.add(omschrijving);
        data.add(Col_PS.toString());
        data.add(Col_Aantal);
        data.add(Col_Prijs.toString());
        javax.swing.JButton button = new JButton("Verwijderen");
        button.addMouseListener(new MyJButtonMouseListener(this));
        data.add(button);
        removeTotalrow();
        model.addRow(data);
        addTotalrow();
    public void addextrarowtotable(String Name, Integer aantal, double prijs){
        Vector data;
        Double Col_PS;
        String Col_Aantal;
        Double Col_Prijs;
        data = new Vector();
        Col_PS = new Double(prijs);
        Col_Aantal = new String(aantal.toString());
        Col_Prijs = new Double(prijs*aantal.intValue());
        data.add("Extra");
        data.add(Name);
        data.add(Col_PS.toString());
        data.add(Col_Aantal);
        data.add(Col_Prijs.toString());
        javax.swing.JButton button = new javax.swing.JButton("Verwijderen");
        button.addMouseListener(new MyJButtonMouseListener(this));
        data.add(button);
        removeTotalrow();
        model.addRow(data);
        addTotalrow();
    public void addspiraalrowtotable(String Name, Integer aantal, double prijs){
        Vector data;
        Double Col_PS;
        String Col_Aantal;
        Double Col_Prijs;
        //model.addColumn("Verwijderen");
        data = new Vector();
        Col_PS = new Double(prijs);;
        Col_Aantal = new String(aantal.toString());
        Col_Prijs = new Double(prijs*aantal.intValue());
        data.add("Spiraal");
        data.add(Name);
        data.add(Col_PS.toString());
        data.add(Col_Aantal);
        data.add(Col_Prijs.toString());
        javax.swing.JButton button = new javax.swing.JButton("Verwijderen");
        button.addMouseListener(new MyJButtonMouseListener(this));
        data.add(button);
        removeTotalrow();
        model.addRow(data);
        addTotalrow();
    public void addklemrugrowtotable(String Name, Integer aantal, double prijs){
        Vector data;
        Double Col_PS;
        String Col_Aantal;
        Double Col_Prijs;
        //model.addColumn("Verwijderen");
        data = new Vector();
        Col_PS = new Double(prijs);
        Col_Aantal = new String(aantal.toString());
        Col_Prijs = new Double(prijs*aantal.intValue());
        data.add("Klemrug");
        data.add(Name);
        data.add(Col_PS.toString());
        data.add(Col_Aantal);
        data.add(Col_Prijs.toString());
        javax.swing.JButton button = new javax.swing.JButton("Verwijderen");
        button.addMouseListener(new MyJButtonMouseListener(this));
        data.add(button);
        removeTotalrow();
        model.addRow(data);
        addTotalrow();
    public void addplastificerenrowtotable(String Name, Integer aantal, double prijs){
        Vector data;
        Double Col_PS;
        String Col_Aantal;
        Double Col_Prijs;
        //model.addColumn("Verwijderen");
        data = new Vector();
        Col_PS = new Double(prijs);
        Col_Aantal = new String(aantal.toString());
        Col_Prijs = new Double(prijs*aantal.intValue());
        data.add("Plastcificeren");
        data.add(Name);
        data.add(Col_PS.toString());
        data.add(Col_Aantal);
        data.add(Col_Prijs.toString());
        javax.swing.JButton button = new javax.swing.JButton("Verwijderen");
        button.addMouseListener(new MyJButtonMouseListener(this));
        data.add(button);
        removeTotalrow();
        model.addRow(data);
        addTotalrow();
    public int getRowCount() {
        if ( model == null ){
            return 0;
        }else {
            return model.getRowCount();
class CopyCalcTableModel extends AbstractTableModel {
    Vector data;
    Vector columnNames;
    CopyCalcTableModel(Vector head_vec, int rows) {
        columnNames = (Vector) head_vec.clone();
        //    coldata = new Vector(columnNames.size());
        data = new Vector(rows);
    CopyCalcTableModel(Vector head_vec) {
        columnNames = (Vector) head_vec.clone();
        //    coldata = new Vector(columnNames.size());
        data = new Vector();
    CopyCalcTableModel(Vector col_vec, Vector head_vec) {
        Vector coldata;
        columnNames = (Vector) head_vec.clone();
        data = (Vector) col_vec.clone();
    public int getColumnCount() {
        //        System.out.println(columnNames);
        return columnNames.size();
    public int getRowCount() {
        //        System.out.println(data);
        return data.size();
    public void removeRow(int row) {
        //        System.out.println(data);
        data.removeElementAt(row);
        fireTableStructureChanged();
    public String getColumnName(int col) {
        return (String) columnNames.elementAt(col);
    public Object getValueAt(int row, int col) {
        Vector v_row;
        Vector v_col;
        v_row = (Vector) data.elementAt(row);
        return v_row.elementAt(col);
     * JTable uses this method to determine the default renderer/
     * editor for each cell.  If we didn't implement this method,
     * then the last column would contain text ("true"/"false"),
     * rather than a check box.
    public Class getColumnClass(int c) {
        // return getValueAt(0, c).getClass();
        int rowIndex = 0;
        Object o = getValueAt(rowIndex, c);
        if (o == null) {
            return Object.class;
        } else {
            // System.out.println(o.getClass());
            return o.getClass();
     * Don't need to implement this method unless your table's
     * editable.
    public boolean isCellEditable(int row, int col) {
        //Note that the data/cell address is constant,
        //no matter where the cell appears onscreen.
        /*Vector v_row;
        v_row = (Vector) data.elementAt(row);
        if (col == 10 ) {
            return true;
        } else {
            return false;
        return false;
     * add collumn
    public void addColumn(String label, Object value){
        columnNames.add(label);
        for ( int i=0;data.size()>i;i++){
            Vector row = (Vector) data.elementAt(i);
            row.add(value);
            data.setElementAt(row, i);
        fireTableStructureChanged();
    public void addRow(Vector values){
        data.add(values);
        fireTableStructureChanged();
     * Don't need to implement this method unless your table's
     * data can change.
    public void setValueAt(Object value, int lrow, int lcol) {
}