change color of particular row in jtable
import javax.swing.table.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
import java.awt.*;
public class Main extends JFrame {
public Main() {
super("TableModel Demonstration");
// create our own custom TableModel
WineTableModel wineModel = new WineTableModel();
JTable table = new JTable(wineModel);
// since we’re using values of floats and boolean here, we need
// to set the cell renderer for every column.
for (int i =0; i<wineModel.getColumnCount();i++) {
table.setDefaultRenderer(table.getColumnClass(i), new WineCellRenderer());
}
// add rows to our TableModel, each row is represented as a Wine object
wineModel.addWine(new Wine("Chateau Meyney, St. Estephe", "1994", 18.75f, true));
wineModel.addWine(new Wine("Chateau Montrose, St. Estephe", "1975", 54.25f, true));
wineModel.addWine(new Wine("Chateau Gloria, St. Julien", "1993", 22.99f, false));
wineModel.addWine(new Wine("Chateau Beychevelle, St. Julien", "1970", 61.63f, false));
wineModel.addWine(new Wine("Chateau La Tour de Mons, Margeaux", "1975", 57.03f, true));
wineModel.addWine(new Wine("Chateau Brane-Cantenac, Margeaux", "1978", 49.92f, false));
// create the scroll pane and add the table to it.
JScrollPane scrollPane = new JScrollPane(table);
// add the scroll pane to this window.
getContentPane().add(scrollPane, BorderLayout.CENTER);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}
public static void main(String[] args) {
Main main = new Main();
main.pack();
main.setVisible(true);
}
}
// a simple object that holds data about a particular wine
class Wine {
private String name;
private String vintage;
private float price;
private boolean inStock;
public Wine(String name, String vintage, float price, boolean inStock) {
this.name = name;
this.vintage = vintage;
this.price = price;
this.inStock = inStock;
}
public String getName() { return name; }
public String getVintage() { return vintage; }
public float getPrice() { return price; }
public boolean getInStock() { return inStock; }
public String toString() {
return "[" + name + ", " + vintage + ", " + price + ", " + inStock + "]"; }
}
class WineTableModel extends AbstractTableModel {
// holds the strings to be displayed in the column headers of our table
final String[] columnNames = {"Name", "Vintage", "Price", "In stock?"};
// holds the data types for all our columns
final Class[] columnClasses = {String.class, String.class, Float.class, Boolean.class};
// holds our data
final Vector data = new Vector();
// adds a row
public void addWine(Wine w) {
data.addElement(w);
fireTableRowsInserted(data.size()-1, data.size()-1);
}
public int getColumnCount() {
return columnNames.length;
}
public int getRowCount() {
return data.size();
}
public String getColumnName(int col) {
return columnNames[col];
}
public Class getColumnClass(int c) {
return columnClasses1;
}
public Object getValueAt(int row, int col) {
Wine wine = (Wine) data.elementAt(row);
if (col == 0) return wine.getName();
else if (col == 1) return wine.getVintage();
else if (col == 2) return new Float(wine.getPrice());
else if (col == 3) return new Boolean(wine.getInStock());
else return null;
}
public Object getValueAtRow(int row) {
Wine wine = (Wine) data.elementAt(row);
return wine;
}
public boolean isCellEditable(int row, int col) {
return false;
}
}
class WineCellRenderer extends DefaultTableCellRenderer {
public Component getTableCellRendererComponent(
JTable table, Object value, boolean isSelected,
boolean hasFocus, int row, int column)
{
WineTableModel wtm = (WineTableModel) table.getModel();
Wine wine = (Wine) wtm.getValueAtRow(row);
if (wine.getPrice() < 55) {
setBackground(Color.green);
}
else {
setBackground(Color.red);
}
return super.getTableCellRendererComponent(table, value, isSelected,
hasFocus, row, column);
}
}