Set background color when condition applied

Question

hi,
Can anybody tell me how to set background color when condition applied.
My initial plan was to highlight a specify row(Change color) when the third column of this JTable consists of OK word.
int rowCount = table.getRowCount();
for(int i=0 ;i <rowCount ; i++)
String word = table.getValueAt(i,3).toString();
if(word.equals("Word")) {
table.setSelectionBackground(Color.red);
break;
else {
table.setBackground(getBackground());
Thanks.

Answer 1

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
public class TableChanges
    public TableChanges()
        String[] headers = { "column 1", "column 2", "column 3", "column 4" };
        int rows = 18;
        int cols = 4;
        String[][] data = new String[rows][cols];
        for(int row = 0; row < rows; row++)
            for(int col = 0; col < cols; col++)
                data[row][col] = "item " + (row * cols + col + 1);
        JTable table = new JTable(data, headers);
        // add custom cell renderer to each column
        TableColumnModel columnModel = table.getColumnModel();
        for(int j = 0; j < columnModel.getColumnCount(); j++)
            TableColumn col = columnModel.getColumn(j);
            col.setCellRenderer(new CellRenderer());
        // add table model listener to listen for cell edits
        // so we can detect our special selection edit value
        // which is "word"
        TableModel tableModel = table.getModel();
        tableModel.addTableModelListener(new ModelListener(table));
        JScrollPane scrollPane = new JScrollPane(table);
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(scrollPane);
        f.setSize(400,400);
        f.setLocation(200,200);
        f.setVisible(true);
        Dimension d = scrollPane.getViewport().getSize();
        table.setRowHeight(d.height/rows);
    public static void main(String[] args)
        new TableChanges();
class ModelListener implements TableModelListener
    JTable table;
    public ModelListener(JTable table)
        this.table = table;
    public void tableChanged(TableModelEvent e)
        int firstRow = e.getFirstRow();
        int lastRow  = e.getLastRow();
        int colIndex = e.getColumn();
        if(e.getType() == TableModelEvent.UPDATE &&
              firstRow != TableModelEvent.HEADER_ROW &&
              colIndex != TableModelEvent.ALL_COLUMNS &&
              colIndex == 2)                            // column 3 only
            String value = (String)table.getValueAt(firstRow, colIndex);
            // check for our special selection criteria
            if(value.equals("word"))
                for(int j = 0; j < table.getColumnCount(); j++)
                    CellRenderer renderer =
                        (CellRenderer)table.getCellRenderer(firstRow, j);
                    renderer.setSpecialSelection(firstRow, j);
class CellRenderer extends DefaultTableCellRenderer
    int specRow, specCol;
    public CellRenderer()
        specRow = -1;
        specCol = -1;
    public Component getTableCellRendererComponent(JTable table,
                                                   Object value,
                                                   boolean isSelected,
                                                   boolean hasFocus,
                                                   int row, int col)
        setHorizontalAlignment(JLabel.CENTER);
        Color color = Color.black;
        if(hasFocus)
            color = Color.blue;
        else if(isSelected)
            color = Color.green.darker();
        else if(row == specRow && col == specCol)
            color = color.red;
        setForeground(color);
        setText((String)value);
        return this;
    public void setSpecialSelection(int row, int col)
        specRow = row;
        specCol = col;
}