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k murali
jtable combo
2 Answer(s)      4 years and 4 months ago
Posted in : Java Beginners


i am using jtable (using defaulttablemodel) ,when i am click on a particular cell of jtable i want to display the combo box in that cell,plz provide program

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April 24, 2010 at 1:19 PM


Hi Friend,

Try the following code:

import java.awt.*;
import java.util.*;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.event.*;
import javax.swing.table.*;
import javax.swing.plaf.basic.*;

public class ComboBoxInTableCell {
public static void main(String[] args) {
JFrame f=new JFrame();
f.setLayout(new BorderLayout());
String data[][] = {{"",""},{"",""},{"",""},{"",""}};
String col[] = {"",""};
DefaultTableModel model = new DefaultTableModel(data,col);
JTable table = new JTable(model);
TableColumnModel tcm = table.getColumnModel();
for(int i=0;i<2;i++){
TableColumn tc= tcm.getColumn(i);
tc.setCellEditor(new ComboEditor());
}
JScrollPane jsp = new JScrollPane(table);
f.add(jsp, BorderLayout.CENTER);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setSize(400, 300);
f.setVisible(true);
}
}
class ComboUI extends BasicComboBoxUI {
public JList getList() {
return listBox;
}
}
class ComboEditor extends JComboBox implements TableCellEditor, CaretListener {
protected EventListenerList listenerList = new EventListenerList();
protected ChangeEvent changeEvent = new ChangeEvent(this);
private ComboUI comboUi = new ComboUI();
private JTextField tf;
Object newValue;
public ComboEditor(){
super();
setUI(comboUi);
addItem("1");
addItem("2");
setEditable(true);
tf = (JTextField) getEditor().getEditorComponent();
tf.addCaretListener(this);
tf.addKeyListener(new KeyAdapter() {
public void keyReleased(KeyEvent e) {
if (e.getKeyCode() == e.VK_ENTER) {
Object value = comboUi.getList().getSelectedValue();
tf.transferFocus();
hidePopup();
}
}
});
addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
}
});
}
public void addCellEditorListener(CellEditorListener listener) {
listenerList.add(CellEditorListener.class, listener);
}
public void removeCellEditorListener(CellEditorListener listener) {
listenerList.remove(CellEditorListener.class, listener);
}
public void cancelCellEditing() {
}
public boolean stopCellEditing() {
return true;
}
public boolean isCellEditable(EventObject event) {
return true;
}
public boolean shouldSelectCell(EventObject event) {
return true;
}
public Object getCellEditorValue() {
tf.setText(newValue.toString());
return newValue;
}
public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected,
int row, int column) {
return this;
}
public void caretUpdate(CaretEvent e) {
if (!isPopupVisible() && tf.isShowing() && tf.hasFocus())
showPopup();
JTextField tf = (JTextField) e.getSource();
String text = tf.getText().toLowerCase();
int index = -1;
for (int i = 0; i < super.getItemCount(); i++) {
String item = ((String) getItemAt(i)).toLowerCase();
if (item.startsWith(text)) {
index = i;
break;
}
}
if (index != -1)
comboUi.getList().setSelectedIndex(index);
else
comboUi.getList().clearSelection();
newValue = comboUi.getList().getSelectedValue();
}
}

Thanks


November 12, 2011 at 6:27 PM


when i select an option in combo box for e.g. "city" & write city name in a text field for e.g. "Delhi" & click on button "show details", then i want a JTable to be displayed showing all the data from database having "city" as "Delhi".

later when i change option in combo box for e.g. "name" & write name in text field for e.g. "xyz" & click on button "show details", then i want the same previous(showing "city") JTable to now show all the data from database with "name" as "xyz". so the data should be updated in JTable.

can you plz help me?



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