I'm trying to use a custom TableModel in my java desktop application. The GUI has been made using NetBeans.
But the thing is when I use the DefaultTableModel then I can see my table in the design view of the GUI.
But when I use my custom TableModel then It is not displayed in the design view, although it is displayed when I run the application.
What seems to be the problem?
Custom Table Model Code
public class BillingTableModel extends AbstractTableModel implements TableModel {
String columnNames[] = {
"Name", "Address", "1", "2", "3"
};
Object data[][] = {
{null,null,null,null,null},
{null,null,null,null,null},
{null,null,null,null,null},
{null,null,null,null,null},
{null,null,null,null,null}
};
Class types[] = new Class [] {
String.class, String.class, String.class, String.class, String.class
};
#Override
public Class<?> getColumnClass (int columnIndex) {
return types[columnIndex].getClass();
}
#Override
public String getColumnName(int column) {
return columnNames[column];
}
#Override
public int getRowCount() {
return data.length;
}
#Override
public int getColumnCount() {
return columnNames.length;
}
#Override
public Object getValueAt(int row, int col) {
return data[row][col];
}
#Override
public boolean isCellEditable (int row, int col) {
if (col >= 2)
return true;
else
return false;
}
#Override
public void setValueAt(Object value, int row, int col) {
data[row][col] = value;
fireTableCellUpdated(row, col);
}
}
I edited the default code to include my class like this
customerTable = new javax.swing.JTable();
customerTable.setModel(new BillingTableModel());
tableScrollPane.setViewportView(customerTable);
Subclass JTable and then you can drag your custom JTable to the Netbeans designer instead of a regular JTable and your custom model will already be visible.
eg.
Put this file in your project as CustomerTable.java
public class CustomerTable extends JTable {
public CustomerTable() {
this.setModel(new BillingTableModel());
}
}
Select the file and choose Run -> Compile File from the Menu. (or press F9)
Delete the JTable you have from your the Netbeans Design view, and drag CustomerTable.java from the projects window into the design view instead.
Related
I am wondering if it is possible to refresh a Table's GUI when the Object[][] used to initially populate it has changed.
Object[][] calculationsTableData;
public Interface() {
...
analysisPanel.add(calculationsTable());
...
}
JScrollPane calculationsTable() {
populateCalculationsTableData();
...
calculationsTable = new JTable(calculationsTableData, calculationsColumnNames);
...
}
void populateCalculationsTableData(){
Object[][] temp = new Object[x.numsSize][7];
for (int i = 0; i < x.numsSize; i++) {
temp[i][0] = df.format(x.nums[i]);
...
}
calculationsTableData = temp;
}
populateCalculationsTableData() is called when the x object has changed to repopulate calculationsTableData
repaint() and revalidate() methods do not appear to be effective in this scenario and neither does fireTableDataChanged() as this is not a table model.
By default JTable creates a new instance of DefaultTableModel AbstractTableModel [1] implementation if no table model is explicitely set. If the table needs to be updated you have to work with its model.
You could...
Set a new DefaultTableModel:
void populateCalculationsTableData() {
...
calculationsTableData = temp;
TableModel model = new DefaultTableModel(calculationsTableData, calculationsColumnNames);
calculationsTable.setModel(model);
}
Or you could...
Create the table using a DefaultTableModel:
TableModel model = new DefaultTableModel(calculationsTableData, calculationsColumnNames);
calculationsTable = new JTable(model);
Cast the table model as DefaultTableModel and set its data and columns like this:
void populateCalculationsTableData() {
...
calculationsTableData = temp;
DefaultTableModel model = (DefaultTableModel)calculationsTable.getModel();
model.setDataVector(calculationsTableData, calculationsColumnNames);
}
Suggested readings
JTable(Object[][] rowData, Object[] columnNames)
DefaultTableModel#setDataVector(Object[][] dataVector, Object[] columnIdentifiers)
How to Use Tables
[1]: After checking JTable(Object[][] rowData, Object[] columnNames) source code I've realized that no DefaultTableModel is created but a new anonymous inner class extending from AbstractTableModel instead.
I would create your own table model to wrap the object arrays, and which exposed the fireTableDataChanged() method:
private static class ObjectArrayModel extends AbstractTableModel {
private final Object[][] rowData;
private final Object[] columnNames;
private ObjectArrayModel(Object[][] rowData, Object[] columnNames) {
this.rowData = rowData;
this.columnNames = columnNames;
}
#Override
public void fireTableDataChanged() {
super.fireTableDataChanged();
}
public String getColumnName(int column) {
this.fireTableDataChanged();
return columnNames[column].toString();
}
public int getRowCount() {
return rowData.length;
}
public int getColumnCount() {
return columnNames.length;
}
public Object getValueAt(int row, int col) { return rowData[row][col]; }
public boolean isCellEditable(int row, int column) { return true; }
public void setValueAt(Object value, int row, int col) {
rowData[row][col] = value;
fireTableCellUpdated(row, col);
}
}
... when the data changes you should be able to call fireTableDataChanged() on this and it will notify the table it needs to redraw itself.
I got an AbstractTableModel, like this:
public class TableModelClienteFornecedor extends AbstractTableModel {
private List<ClienteFornecedorDTO> linhas;
private String[] colunas = new String[]{"Nome", "Conta"};
public TableModelClienteFornecedor() {
linhas = new ArrayList<>();
}
#Override
public int getRowCount() {
return linhas.size();
}
#Override
public int getColumnCount() {
return colunas.length;
}
#Override
public String getColumnName(int column) {
return colunas[column];
}
#Override
public Class getColumnClass(int column) {
return (getValueAt(0, column).getClass());
}
#Override
public Object getValueAt(int rowIndex, int columnIndex) {
ClienteFornecedorDTO cf = linhas.get(rowIndex);
switch (columnIndex) {
case 0:
return cf.getNome();
case 1:
return cf.getConta();
default:
throw new IndexOutOfBoundsException("Coluna incorreta");
}
}
public void clear(JTable table) {
table.setRowSorter(null);
int indiceAntigo = this.getRowCount();
linhas.clear();
int indiceNovo = this.getRowCount();
this.fireTableRowsDeleted(indiceAntigo, indiceNovo);
}
public boolean isEmpty() {
return linhas.isEmpty();
}
public void add(ClienteFornecedorDTO cf) {
linhas.add(cf);
int index = this.getRowCount();
fireTableRowsInserted(index, index);
}
public void addList(List<ClienteFornecedorDTO> list, JTable table) {
int tamanhoAntigo = this.getRowCount();
linhas.addAll(list);
int tamanhoNovo = this.getRowCount() - 1;
this.fireTableRowsInserted(tamanhoAntigo, tamanhoNovo);
table.setAutoCreateRowSorter(true);
}
public ClienteFornecedorDTO get(int i) {
return linhas.get(i);
}
}
And the code below works ok to fill the my Jtable with data:
private void realizarBusca(String nome) {
IContaDAO dao = new ContaDAO();
boolean isFornecedor = radioFornecedor.isSelected();
List<ClienteFornecedorDTO> retorno =
dao.retornaContaClienteFornecedor(isFornecedor, nome);
tableModelClienteFornecedor.clear();
tableModelClienteFornecedor.addList(retorno, tableClienteFornecedor);
tableClienteFornecedor.updateUI();
}
Everything's working fine to me, and when I sort my Jtable visibily it's ok too, the problem is when I click on a specific row from my Jtable after I sorted it, the row it's not updated.
Anyone can help me with that?
I would appreciate, 'cause I'm on it since yesterday and still wasn't able to find a way to solve it.
Look at the methods convertRowIndexToModel() and convertRowIndexToView() in JTable.
When the table is sorted, the indices of the rows in the view don't match with the indices in the model anymore, and you have to use the above methods to convert from index to view and vice-versa.
For example, if you call JTable.getSelectedRow(), you'll get the view index of the selected row. You'll have to convert it to the model index (using convertRowIndexToModel()) to be able to get the selected object from the list in your model.
I'm developing a software for my friend.I have developed 90% of my project and my problem is I have a table which I fill with data in database.I have used a custom table model to fill jtable. It fills data perfectly but the problem is it doesn't contain proper column header instead of that it contain A,B,C for column headers .
here is my custom table model class.
public class SellUpdateModel extends AbstractTableModel
{
private Vector<Vector> data;
public SellUpdateModel(String Jid)
{
data = new Vector<>();
data = new JobDetailsDAO().get_ItemDescriptionAndQuantity(Jid); //Retrive data from databse and fill it to vector.
}
#Override
public boolean isCellEditable(int rowIndex, int columnIndex)
{
return false; // does not allowed to edit cells
}
#Override
public int getRowCount()
{
return data.size();
}
#Override
public int getColumnCount()
{
return 3;
}
#Override
public Object getValueAt(int rowIndex, int columnIndex)
{
return data.elementAt(rowIndex).elementAt(columnIndex);
}
public SellUpdateModel deleteRow(int row, Vector pData)
{
data.remove(data.elementAt(row)); // remove a record from vector
data.add(pData); // add a record to vector
return this;
}
}
You have to override getColumnName(int columnIndex).
public class SellUpdateModel extends AbstractTableModel {
private final String[] tableHeaders = {"X", "Y", "Z"};
#Override
public String getColumnName(int columnIndex) {
return tableHeaders[columnIndex];
}
}
I have a LinkedHashSet of Book objects. The Book objects have the following fields:
private int id;
private String author = "";
private String title = "";
private boolean isRead;
private String dateStamp = "";
private static int counter = 0;
I want them to go into my JTable which has the following columns:
String [] columnNames = {"ID","Title", "Author", "Status", "Date Read"};
How can I do this? And is it possible to have the isRead field being editable through a checkbox in the table?
You need to have a class that extends AbstractTableModel. This class should use your LinkedHashSet as the data source for your table. The basic implementation provided by AbstractTableModel should suit most of your needs. If not, then you can override the methods you need to customize.
This tutorial should help you understand how JTable objects work.
This is a sample model I have created for the table.
public class CustomModel extends AbstractTableModel {
private Object[] colNames ={"ID","Title", "Author", "Status", "Date Read"};
private LinkedHashSet<CustomClass> data;
public TableModelTop() {
this.data = getDataForDropList();
}
public int getRowCount() {
return data.size();
}
public int getColumnCount() {
return colNames.length;
}
#Override
public String getColumnName(int columnIndex) {
return (String) colNames[columnIndex];
}
#Override
public void setValueAt(Object aValue, int rowIndex, int columnIndex) {
// Set Values here;
}
public Object getValueAt(int rowIndex, int columnIndex) {
// Get row Values here;
}
#Override
public boolean isCellEditable(int rowIndex, int columnIndex) {
return true;
}
#Override
public Class<?> getColumnClass(int columnIndex) {
// Depending on the type of the column. Return data type;
}
/**
* Populate the data from here.
* #return LinkedHashSet<CustomClass>
*/
private LinkedHashSet<CustomClass> getDataForDropList() {
LinkedHashSet<CustomClass> modelList = new LinkedHashSet<CustomClass>();
for(int i = 0; i< 5; i++) {
// Create custom Object and add them to the LinkedHashSet.
// Create a CustomClass object and add it to the LinkedHashSet
modelList.add(customClassObject);
}
// Finally return the llinkedhashset
return modelList;
}
}
After this just call the table model and assign this to the JTable.
JTable table = new JTable(new CustomModel());
As a concrete example of using AbstractTableModel, you can leverage the toArray() method inherited by LinkedHashSet to simplify the implementation of getValueAt(), as shown in this related EnvTableTest. The default JTable renderer and editor use JCheckBox for TableModel elements of type Boolean.class, as shown in this example.
I've been reading posts similar to mine, and reading through the Java tutorial page but I just can't seem to get this working. I'm not sure if I'm missing something fundamental or not...
I have a custom table model below that I need to be able to delete rows from. The table is initialized empty and rows are added through a combo box and an add button. There is also a delete button that needs to delete the selected row out of the table.
class TableModel extends AbstractTableModel
{
private String[] columnNames = {"Enabled", "Value" };
protected Class[] columnClasses = new Class[] { Boolean.class, String.class };
public int getColumnCount() { return columnNames.length; }
public int getRowCount() { return filters.size(); }
public String getColumnName(int col) { return columnNames[col]; }
public Class getColumnClass(int col) { return columnClasses[col]; }
public Object getValueAt(int row, int col) { ... }
public void setValueAt(Object value, int row, int col) { ... }
public void addRow(String value)
{
fireTableRowsInserted(filters.size() - 1, filters.size() - 1);
int row = filters.size() -1 ;
int col = 1;
setValueAt(value, row, col);
}
public void removeRow(int row)
{
fireTableRowsDeleted(selectedRow, selectedRow);
}
}
I have confirmed that selectedRow contains the correct row through prints in the console. The fireTableRowsDeleted function just doesn't do anything. The row still exists. How do you just delete a specific row?
Thanks,
The call to fireTableRowsDeleted simply fires off the event to indicate rows have been deleted, you still need to actually remove them from the model.
Immediately after I posted this I figured it out.
The rows contents are based on a List of filters:
public int getRowCount() { return filters.size(); }
My problem was I was trying to delete a row without removing that from the list. So I modified removeRow() to be the following:
public void removeRow(int row)
{
filters.remove(row);
fireTableRowsDeleted(row, row);
}
And it works like a charm.
cheers
I think this is the answer:
final int row = selectedRow;
EventQueue.invokeLater(new Runnable() {
public void run() {
model.removeRow(row);
}
});
The row will be deleted when the editing is finished.