How to Alternate Row Color of JTable in Java

In this tutorial, we are going to see how to alternate row color of a JTable in Java. JTable is a subclass of JComponent class and it can be used to create a table with information displayed in multiple rows and columns. When a value is selected in a JTable, a TableModelEvent is generated, which is handled by implementing TableModelListener interface.

We can set the color to alternate the color of the rows in a JTable by redefining the method prepareRenderer() of JTable class.
 

Syntax:

public Component prepareRenderer(TableCellRenderer renderer, int row, int column)

 

Java Program to Alternate Row Color of JTable

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;

public class JtableColor extends JFrame 
{
   public JtableColor() 
   {
      setTitle("Alternate JTable color");

      //JTable Headers 
      String[] columns = new String[]{"Id","Name","Address","Hourly rate"};

      //data for JTable in a 2D table
      Object[][] data = new Object[][] {
          {1, "Thomas", "Alaska", 20.0 },
          {2, "Jean", "Arizona", 50.0 },
          {3, "Yohan", "California", 30.0 },
          {4, "Emily", "Florida", 60.0 },
          {5, "Alex", "New York", 10.0 },
      };
 
      JTable table = new JTable(data, columns) {
         public Component prepareRenderer(TableCellRenderer renderer, 
         int row, int column) 
         {
            Component c = super.prepareRenderer(renderer, row, column);
            Color color1 = new Color(220,220,220);
            Color color2 = Color.WHITE;
            if(!c.getBackground().equals(getSelectionBackground())) {
               Color coleur = (row % 2 == 0 ? color1 : color2);
               c.setBackground(coleur);
               coleur = null;
            }
            return c;
         }
      };
      add(new JScrollPane(table));
      setSize(400, 200);
      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      setLocationRelativeTo(null);
      setVisible(true);
   }
   public static void main(String[] args) {
      new JtableColor();
   }
}

Output:

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