JTable column names problem
Hi all,
how can I set the column names?
I'm using a TableModel, but as result I get "A", "B" and "C", instead of the column names "Sector", "Stock" and "Stock value".
// This is the "main" GUI class
publicclass GUIextends JPanel{
//...
private JSplitPane createJSplitPane(){
// Creates a JSplitPane: the JTable is in the right side
JTable table =new JTable(new TableModel());
table.setPreferredScrollableViewportSize(new Dimension(200, 200));
table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
// Scrollbar appears as needed
JScrollPane right =new JScrollPane(table);
right.setBorder(BorderFactory.createCompoundBorder(
BorderFactory.createTitledBorder("Subscribed stocks"),
BorderFactory.createEmptyBorder(2,2,2,2)));
//...
}
}
// This is the table model class
class TableModelextends AbstractTableModel{
/**
*
*/
privatestaticfinallong serialVersionUID = 1;
publicstaticfinal String SECTOR_NAME ="Sector";
publicstaticfinal String STOCK_NAME ="Stock";
publicstaticfinal String STOCK_VALUE ="Stock value";
privatestaticfinalint COLUMNS = 3;
privatestaticint START_NUM_ROWS = 3;
privateint numRows = 0;
privateint nextEmptyRow = 0;
private Vector<Stock> data;
public TableModel(){
data =new Vector<Stock>(10);
}
publicint getRowCount(){
return data.size();
}
publicint getColumnCount(){
return COLUMNS;
}
public Object getValueAt(int rowIndex,int columnIndex){
Stock stock = data.get(rowIndex);
switch (columnIndex){
case 0:
return stock.getSector();
case 1:
return stock.getName();
case 2:
return stock.getValue();
default:
}
return"";
}
@Override
publicboolean isCellEditable(int rowIndex,int columnIndex){
returnfalse;
}
@Override
public Class<?> getColumnClass(int c){
return getValueAt(0, c).getClass();
}
publicsynchronizedvoid updateStock(Stock newValue){
final String name = newValue.getName();
int index = -1;
boolean found =false;
boolean addedRow =false;
int i = 0;
Stock tmp =null;
while (!found && (i < nextEmptyRow)){
tmp = data.get(i);
if (tmp.getName() == name){
found =true;
index = i;
}else{
i++;
}
}
if (found){// Updates old stock
data.set(i, newValue);
}else{// Adds new stock
if (numRows <= nextEmptyRow){
// Adds a row
numRows++;
addedRow =true;
}
index = nextEmptyRow;
data.add(newValue);
}
nextEmptyRow++;
//Notify listeners that the data changed.
if (addedRow){
fireTableRowsInserted(index, index);
}else{
fireTableRowsUpdated(index, index);
}
}
/**
* Clears the table.
*/
publicsynchronizedvoid clear(){
int oldNumRows = numRows;
numRows = START_NUM_ROWS;
data.clear();
nextEmptyRow = 0;
if (oldNumRows > START_NUM_ROWS){
fireTableRowsDeleted(START_NUM_ROWS, oldNumRows - 1);
}
fireTableRowsUpdated(0, START_NUM_ROWS - 1);
}
}//END TableModel
Any idea?
Regards,
Michele
