Customized JTable cell

Question

Hello there:
I want to customize the JTable cell which combines a textfield and a label. other than that, it will behave like any other Jtable component. I wrote a sample class as below, it looks ok but acts weird. Most likely my customized renderer is wrong, anyone pls revise it? thanks a lot!
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Dimension;
import javax.swing.BorderFactory;
import javax.swing.BoxLayout;
import javax.swing.DefaultCellEditor;
import javax.swing.JFormattedTextField;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.table.TableCellRenderer;
public class CustomizedTable extends JFrame {
* @param args
CustomizedTable(){
String[] col = new String[]{
"col1", "col2","col3"
Object[][] data = {
{"1","2","3"},
{"1","2","3"},
{"1","2","3"},
{"1","2","3"}
JTable table = new JTable(data,col);
DataColumn dc = new DataColumn();
table.setDefaultRenderer(table.getColumnClass(0),dc);
table.setDefaultEditor(table.getColumnClass(0),dc);
dc = new DataColumn();
table.setDefaultRenderer(table.getColumnClass(1),dc);
table.setDefaultEditor(table.getColumnClass(1),dc);
dc = new DataColumn();
table.setDefaultRenderer(table.getColumnClass(2),dc);
table.setDefaultEditor(table.getColumnClass(2),dc);
JScrollPane scroll = new JScrollPane(table);
scroll.setPreferredSize (new Dimension(300,200));
getContentPane().add(scroll, BorderLayout.CENTER);
pack();
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
public static void main(String[] args) {
// TODO Auto-generated method stub
new CustomizedTable();
class DataColumn extends DefaultCellEditor implements TableCellRenderer {
JFormattedTextField ftf;
private JPanel panel = null;
private JLabel l = new JLabel(" %");
public DataColumn() {
super(new JFormattedTextField());
ftf = (JFormattedTextField) getComponent();
ftf.setHorizontalAlignment(JTextField.RIGHT);
ftf.setFocusLostBehavior(JFormattedTextField.PERSIST);
ftf.setBorder(BorderFactory.createEmptyBorder());
panel = new JPanel();
panel.setLayout(new BoxLayout(panel, BoxLayout.X_AXIS));
panel.add(ftf);
panel.add(l);
public Component getTableCellRendererComponent(JTable table, Object o,
boolean isSelected, boolean hasFocus, int row, int column) {
ftf = (JFormattedTextField) getComponent();
ftf.setHorizontalAlignment (JTextField.RIGHT);
ftf.setFocusLostBehavior(JFormattedTextField.PERSIST);
ftf.setBorder(BorderFactory.createEmptyBorder());
//panel = new JPanel();
//panel.setLayout(new BoxLayout(panel, BoxLayout.X_AXIS));
//panel.add(ftf);
//panel.add(l);
return panel;
public Component getTableCellEditorComponent(JTable table, Object value,
boolean isSelected, int row, int column) {
JFormattedTextField ftf = (JFormattedTextField) super
.getTableCellEditorComponent(table, value, isSelected, row,
column);
ftf.setValue(value);
// ftf.setBorder(BorderFactory.createEmptyBorder());
// ftf.setHorizontalAlignment(JTextField.RIGHT);
// panel = new JPanel();
// panel.setLayout(new BoxLayout(panel, BoxLayout.X_AXIS));
// panel.add(ftf);
// panel.add(l);
return panel;
}

Answer 1

After 40 postings you should know how to use the [url http://forum.java.sun.com/help.jspa?sec=formatting]Code Formatting Tags.