Java Utililty Methods JTable Model

List of utility methods to do JTable Model

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JTable Model

Description

The list of methods to do JTable Model are organized into topic(s).

Method

int compactDefaultTableModel(DefaultTableModel defaultTableModel)
compact Default Table Model

int destIndex = 0;
int lastSourceIndexNonEmpty = -1; 
int count = 0;
for (int sourceIndex = 0; sourceIndex < defaultTableModel.getRowCount(); sourceIndex++) {
 Object object = defaultTableModel.getValueAt(sourceIndex, 0);
 if (object != null) {
 String entry = object.toString().trim();
 entry = entry.trim();
...

int convertModelIndexToView(JTable table, int modelIndex)
Converts an index as it appears in a model to one in the view

for (int col = 0; col < table.getColumnCount(); col++) {
 if (table.getColumnModel().getColumn(col).getModelIndex() == modelIndex) {
 return col;
return -1;

int[] convertSelectionToModel(JTable table)
Converts the selected view indexes to model indexes.

int[] selected = table.getSelectedRows();
for (int i = 0; i < selected.length; i++) {
 selected[i] = table.convertRowIndexToModel(selected[i]);
return selected;

List convertTableToList(DefaultTableModel table)
Returns a list as a table with the first line representing the name of the columns.

List<String> schedule = new Vector<String>();
StringBuilder builder = new StringBuilder();
int numCol = table.getColumnCount();
int numRow = table.getRowCount();
for (int i = 0; i < numCol; i++) {
 builder.append(table.getColumnName(i)).append(" ");
schedule.add(builder.toString());
...

void dumpToText(TableModel m, String filename)
dump To Text

try {
 PrintWriter writer = new PrintWriter(new BufferedWriter(new FileWriter(filename)));
 int nc = m.getColumnCount();
 int nr = m.getRowCount();
 StringBuffer buf = new StringBuffer(nc * 30);
 for (int i = 0; i < nc; i++) {
 buf.append("\t").append(m.getColumnName(i));
 writer.println(buf.toString());
 for (int i = 0; i < nr; i++) {
 for (int j = 0; j < nc; j++) {
 writer.print("\t");
 writer.print(m.getValueAt(i, j).toString());
 writer.println();
 writer.close();
} catch (IOException ioe) {
 System.err.println("Error " + ioe.getMessage() + "dumping table to text");

void fireTableDataChangedAndKeepSelection(final AbstractTableModel tableModel, final JTable table)
DOCUMENT ME!

final int selection_view = table.getSelectedRow();
int selection_model_tmp = -1;
if (selection_view > -1) {
 selection_model_tmp = table.convertRowIndexToModel(selection_view);
final int selection_model = selection_model_tmp;
tableModel.fireTableDataChanged();
SwingUtilities.invokeLater(new Runnable() {
...

DefaultTableModel getDefaultTableModel()
get Default Table Model

return new DefaultTableModel() {
 @Override
 public boolean isCellEditable(int row, int column) {
 return false;
};

int getSelectedModelIndex(JTable table)
get Selected Model Index

int selectedRow = table.getSelectedRow();
if (selectedRow < 0) {
 return -1;
return rowToModelIndex(table, selectedRow);

LinkedHashMap getTableContent(TableModel table)
get Table Content

int rowCount = table.getRowCount();
LinkedHashMap<String, String> result = new LinkedHashMap<>();
for (int row = 0; row < rowCount; row++) {
 String key = (String) table.getValueAt(row, 0);
 if (TextUtils.isEmpty(key))
 continue;
 String value = (String) table.getValueAt(row, 1);
 result.put(key, value);
...

void insertTableModelListener(TableModel model, TableModelListener l, int index)
insert Table Model Listener

if (!(model instanceof AbstractTableModel)) {
 model.addTableModelListener(l);
 return;
TableModelListener[] listeners = ((AbstractTableModel) model).getTableModelListeners();
for (TableModelListener listener : listeners) {
 model.removeTableModelListener(listener);
for (int i = 0; i < listeners.length; i++) {
 TableModelListener listener = listeners[i];
 if (index == i) {
 model.addTableModelListener(l);
 model.addTableModelListener(listener);
if ((index < 0) || (index > listeners.length - 1))
 model.addTableModelListener(l);