I have seven boolean values in a column of a JTable that I want to bind to my bean.
How do I bind them?
All the JTable binding examples out there focus on binding the table selection, but I only care about what the values of those booleans are.
You need to implement your own data model. I give you simplified example that shows idea of usage. Take a look at getColumnClass method.
Usage: table.setModel(new DataModel(myData));
class DataModel extends AbstractTableModel
{
public DataModel(Object yourData){
//some code here
}
#Override
public int getRowCount() {
return yourData.rows;
}
#Override
public int getColumnCount() {
return yourData.colums;
}
#Override
public Class<?> getColumnClass(int col) {
if (col == myBooleanColumn) {
return Boolean.class;
} else {
return null;
}
}
#Override
public boolean isCellEditable(int row, int col)
{
return col >= 0;
}
#Override
public Object getValueAt(int rowIndex, int columnIndex) {
return yourData.get(rowIndex,columnIndex);
}
#Override
public void setValueAt(Object aValue, int row, int col) {
yourData.set(aValue,row,col)
this.fireTableCellUpdated(row, col);
}
}
Hope this helps.
Related
I have stored in a List a dataset from the Database. (It contains data of a single column).
In my inner class which implements my own TableDataModel I simply convert that List to a Vector to feed the JTable. In a second column I would like to display for each row a JCheckBox (rows with ticked Checkboxes will be stored afterwards in the database).
How can I extend/append the List/Vector with the "Boolean.TRUE" or "Boolean.False" as the value for the second column?
Sorry I am bloody newbie... thanks a lot
class SetVehicleCategoryTableModel extends AbstractTableModel {
private List<Category> all = null;
Vector<Object> tableData;
Vector<String> tableHeaders;
public SetVehicleCategoryTableModel(){
initModel();
}
public void initModel(){
tableData = new Vector<Object>();
// TableModel's column names
tableHeaders = new Vector<String>();
tableHeaders.add("Category");
tableHeaders.add("Selection");
// Database call
all = new ReadCategory().allCategories();
// TableModel's data
// converting List<Category> -> Vector<Object> tableData
for(Object o : all) {
tableData.addElement(o);
//tableData.add(,o);
// debug:
System.out.println("item added");
}
//debug:
System.out.println(tableData.size());
for(Object obj : tableData){
System.out.println(obj.toString());
}
}
#Override
public int getRowCount() {
return tableData.size();
}
#Override
public int getColumnCount() {
return tableHeaders.size();
}
#Override
public String getColumnName(int column){
return tableHeaders.elementAt(column);
}
#Override
public Object getValueAt(int rowIndex, int columnIndex) {
return tableData.elementAt(rowIndex);
//return ((Vector<Object>) tableData.get(rowIndex)).get(columnIndex);
}
public void removeRow(int row) {
tableData.removeElementAt(row);
fireTableDataChanged();
}
public void insertRow(Object aValue) {
tableData.addElement(aValue);
fireTableDataChanged();
//fireTableRowsInserted(index, index);
}
#Override
public void setValueAt(Object aValue, int rowIndex, int columnIndex){
Category edit = (Category) tableData.elementAt(rowIndex);
edit.setName((String) aValue);
fireTableCellUpdated(rowIndex, columnIndex);
//fireTableRowsUpdated(rowIndex, columnIndex);
}
// This method is used by the JTable to define the default
// renderer or editor for each cell. For example if you have
// a boolean data it will be rendered as a check box. A
// number value is right aligned.
/*#Override
public Class<?> getColumnClass(int columnIndex) {
return getValueAt(0, columnIndex).getClass();
//return data[0][columnIndex].getClass();
}*/
public Class<?> getColumnClass(int columnIndex) {
return getValueAt(0, columnIndex).getClass();
}
public boolean isCellEditable(int rowIndex, int columnIndex) {
return true;
}
}
I am having an issue adding an ImageIcon to my JLabel in my JTable. So far I am entirely able to manipulate the cell based on the value of the data in the cell however whenever I try to add in an image I am only seeing the text.
Table Renderer
class DeviceTableModel extends AbstractTableModel {
private Object[][] data = Globals.getArray();
private String[] columnNames = {"Name","Status","Description"};
#Override
public int getRowCount() {
return data.length;
}
#Override
public int getColumnCount() {
return columnNames.length;
}
#Override
public Object getValueAt(int rowIndex, int columnIndex) {
return data[rowIndex][columnIndex];
}
#Override
public String getColumnName(int col) {
return columnNames[col];
}
#Override
public Class getColumnClass(int c) {
return getValueAt(0,c).getClass();
}
#Override
public void setValueAt(Object value, int row, int col) {
data[row][col] = value;
fireTableCellUpdated(row,col);
}
}
This is the Renderer I am using in my JTable.
#Override
public Component prepareRenderer(TableCellRenderer renderer, int row, int col) {
JLabel comp = (JLabel)super.prepareRenderer(renderer, row, col);
Object value = getModel().getValueAt(row, col);
if (value.equals("online")) {
comp.setIcon(new ImageIcon("/Res/online.png"));
comp.setBackground(Color.green);
}else {
comp.setBackground(Color.white);
}
return comp;
}
The color and text set just fine but the icon will not display. Any ideas would be appreciated!
EDIT- Suggestions by VGR and Camickr
Your advice was spot on and resolved the issue! Take a look at the redone portion. I am very grateful. Thanks guys!
//preloaded just added here to show.
ImageIcon icon = new ImageIcon(getClass().getResource("/Res/onlineIcon.png"));
#Override
public Component prepareRenderer(TableCellRenderer renderer, int row, int col) {
JLabel comp = (JLabel)super.prepareRenderer(renderer, row, col);
Object value = getModel().getValueAt(row, col);
if (value.equals("online")) {
comp.setIcon(icon);
comp.setBackground(new Color(173,255,92));
}else {
comp.setIcon(null);
comp.setBackground(Color.white);
}
return comp;
}
}
The ImageIcon constructor documentation makes it clear that the string argument is a filename. Unless your system has a Res directory in the root of the file system, you probably meant to do new ImageIcon(getClass().getResource("/Res/online.jpg")) or new ImageIcon(getClass().getResource("/online.jpg")).
Note that your else clause should be setting the icon to null, since a single renderer may be used for multiple table cells.
I'm trying to read a csv file and get it setup to convert into another format to save some time at work, but the JTable i'm loading it into throws an exception when a row has a length less than the expected column. Is there a method to create an empty cell if row length < column length?
here is the table model:
private class CSVTableModel extends AbstractTableModel{
private ArrayList<String[]> list;
private String[] columns;
public CSVTableModel() {
this.list = p.getData();
this.columns = p.getHeaders();
}
#Override
public String getColumnName(int col) {
return columns[col];
}
#Override
public int getRowCount() {
return list.size();
}
#Override
public int getColumnCount() {
return columns.length;
}
#Override
public Object getValueAt(int row, int col) {
return list.get(row)[col];
}
#Override
public void setValueAt(Object value, int row, int col) {
list.get(row)[col] = (String) value;
this.fireTableCellUpdated(row, col);
}
}
So you can see with the getValueAt(int row, int col) method it will cause an error if the col exceeds the String[].length.
I literally solved it after posting. Rubber duck debugging.
#Override
public Object getValueAt(int row, int col) {
if ( col < list.get(row).length ) {
return list.get(row)[col];
} else {
return "";
}
}
added a condition and works fine now. Should've seen it before.
I'm using a JTable in java, but it won't let me edit the cells.
private final TableModel dataModel = new AbstractTableModel() {
public int getColumnCount() {
return 5;
}
public int getRowCount() {
return 10;
}
public Object getValueAt(int row, int col) {
return new Integer(row*col);
}
};
private final JTable table = new JTable(dataModel);
add the follwoing code
public boolean isCellEditable(int row, int col)
{ return true; }
public void setValueAt(Object value, int row, int col) {
rowData[row][col] = value;
fireTableCellUpdated(row, col);
}
you should have a array where you will save the changes
Add isCellEditable() function inside the anonymous inner class AbstractTableModel
public boolean isCellEditable(int row, int col) {
return true;
}
Try
private final TableModel dataModel = new AbstractTableModel() {
public int getColumnCount() {
return 5;
}
public int getRowCount() {
return 10;
}
public Object getValueAt(int row, int col) {
return new Integer(row*col);
}
public boolean isCellEditable(int row, int col) {
return true;
}
};
Add isCellEditable() to the rows and columns you want them to be editable, example if you don't want some columns like ID to be editable return false. Keep in mind that you need to save the editit data some where
public boolean isCellEditable(int row, int col) {
return true; // or false for none editable columns
}
public void setValueAt(Object value, int row, int col) {
rowData[row][col] = value; // save edits some where
fireTableCellUpdated(row, col); // informe any object about changes
}
I have a JTable that uses an AbstractTableModel. I'm trying to make the first row of the table a row of JCheckboxes.
EDIT: The goal is to take the columns with checked checkboxes and create a new table. This is my first time trying something like this, so I'm open to suggestions.
Here is the code I'm trying in NetBeans 7.1.1 :
private void selectSourceCBActionPerformed(java.awt.event.ActionEvent evt) {
int sourceNum = selectSourceCB.getSelectedIndex();
DataSource currentDS = datSourceArrList.get(sourceNum);
final ArrayList<Object[]> workArrLst1 = currentDS.getSampSet();
sourceDetailTable.setAutoResizeMode(sourceDetailTable.AUTO_RESIZE_OFF);
sourceDetailTable.setColumnSelectionAllowed(true);
JTableHeader header = sourceDetailTable.getTableHeader();
AbstractTableModel mytable1 = new AbstractTableModel() {
Object colNames[] = workArrLst1.get(0);
#Override
public int getRowCount() {
return workArrLst1.size();
}
#Override
public int getColumnCount() {
return workArrLst1.get(1).length;
}
#Override
public Object getValueAt(int rowIndex, int columnIndex) {
return workArrLst1.get(rowIndex+1)[columnIndex];
}
#Override
public void setValueAt(Object value, int row, int col) {
if(row == 1){
workArrLst1.get(row)[col] = Boolean(false);
fireTableCellUpdated(row, col);
}
workArrLst1.get(row)[col] = (String) value;
fireTableCellUpdated(row, col);
}
#Override
public String getColumnName(int column) {
return (String) colNames[column];
}
};
}
Is there anything obvious I'm missing here?