Trying to change the color of a single cell

Question

hi, I am trying to change the color of a single cell when mouse moves over it, but couldn't do it. i even tried my own renderer, but it doesn't work. can anybody help ?

Answer 1

Here is what I am trying to do. I am displaying some data in a java JTable retrieved from a table in database. What is needed is when user moves his mouse over any cell in the third column, the cursor should change to hand cursor and possibly the background color should also change, to indicate the user that this cell is clickable. I have to show some other report when user clicks any cell in column three. The code follows as
import java.awt.*;
import java.sql.*;
import javax.swing.*;
import java.awt.event.*;
import javax.sql.rowset.*;
import javax.swing.table.*;
public class MouseMotionInTable extends JFrame
public static void main(String[] args)
  MouseMotionInTable f = new MouseMotionInTable();
  Toolkit tk = Toolkit.getDefaultToolkit();
  Dimension dim = tk.getScreenSize();
  int w = dim.width;
  int h = dim.height;
  f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  f.setBounds((w-600)/2, (h-300)/2, 600, 300);
  f.setVisible(true);
MouseMotionInTable()
  Connection con = null;
  CachedRowSet crs = null;
  try
   Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
   con = DriverManager.getConnection("jdbc:odbc:FMS", "", "");
   Statement st = con.createStatement();
   String query = "SELECT ItemName, Alias, ItemReOrderQuty, ItemMeasure FROM ItemInfo";
   ResultSet rs = st.executeQuery(query);
   crs = new com.sun.rowset.CachedRowSetImpl();
   crs.populate(rs);
   st.close();
  catch (SQLException e)
   e.printStackTrace();
  catch (ClassNotFoundException e)
   e.printStackTrace();
  finally
   if(con != null)
    try
     con.close();
    catch (SQLException e)
     e.printStackTrace();
  DBTableModel model = new DBTableModel(crs);
  table = new JTable(model);
  JPanel center = new JPanel();
  center.setLayout(new BorderLayout());
  center.add(new JScrollPane(table), BorderLayout.CENTER);
  add(center, BorderLayout.CENTER);
  table.addMouseMotionListener(new MouseMotionAdapter()
   public void mouseMoved(MouseEvent me)
    int col = table.columnAtPoint(new Point(me.getX(), me.getY()));
    int row = table.rowAtPoint(new Point(me.getX(), me.getY()));
    if(col == 2)
     Object val = table.getValueAt(row, col);
     boolean isSelect = table.isCellSelected(row, col);
     boolean focus = table.isCellSelected(row, col);
     TableCellRenderer cellRender = table.getCellRenderer(row, col);
     Component comp = cellRender.getTableCellRendererComponent(table, val, isSelect, focus, row, col);
     comp.setCursor(new Cursor(Cursor.HAND_CURSOR));
     comp.setBackground(Color.yellow);
private JTable table;
class DBTableModel extends AbstractTableModel
ResultSet rs;
ResultSetMetaData rsMeta;
DBTableModel(ResultSet rs)
  try
   this.rs = rs;
   rsMeta = rs.getMetaData();
  catch(SQLException e)
   e.printStackTrace();
public int getColumnCount()
  try
   return rsMeta.getColumnCount();  
  catch(SQLException e)
   e.printStackTrace();
  return -1;
public String getColumnName(int c)
  try
   return rsMeta.getColumnName(c+1);
  catch(SQLException e)
   e.printStackTrace();
  return "";
public int getRowCount()
  try
   rs.last();
   return rs.getRow();
  catch(SQLException e)
   e.printStackTrace();
  return -1;
public Object getValueAt(int r, int c)
  try
   rs.absolute(r+1);
   return rs.getObject(c+1);
  catch(SQLException e)
   e.printStackTrace();
  return "";
public boolean isCellEditable(int r, int c)
  return false;
public Class getColumnClass(int c)
  return getValueAt(0,c).getClass();
}