How to Change Color of Column in JTable

In this tutorial, we are going to see how to change font color of a column in JTable. JTable is a subclass of JComponent class for displaying complex data structures. JTable component can follow the Model View Controller (MVC) design pattern to display data in rows and columns. A JTable can generate TableModelListener, TableColumnModelListener, ListSelectionListener, CellEditorListener, RowSorterListener interfaces. We can change the background and foreground color for each column of a JTable by customizing the DefaultTableCellRenderer class and it has only one method getTableCellRendererComponent() to implement it.

 

Java Program to Change Color of Column in JTable:

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

public class JtableColor extends JFrame 
{
   private JTable table;
   private TableColumn col;
   
   public JtableColor() 
   {
      setTitle("Color a JTable column");
    
      //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, true },
          {4, "Emily", "Florida", 60.0 },
          {5, "Alex", "New York", 10.0 },
      };
 
      //create a JTable with data
      table = new JTable(data, columns);
      //get the 2nd column
      col = table.getColumnModel().getColumn(1);
      //define the renderer
      col.setCellRenderer(new MyRenderer(Color.lightGray, Color.blue));
      //add table to frame
      add(new JScrollPane(table), BorderLayout.CENTER);

      setSize(400, 200);
      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      setLocationRelativeTo(null);
      setVisible(true);
   }
   public static void main(String [] args) {
      new JtableColor();
   }
}

// Customize the code to set the color for each column in JTable
class MyRenderer extends DefaultTableCellRenderer 
{
   Color bg, fg;
   public MyRenderer(Color bg, Color fg) {
      super();
      this.bg = bg;
      this.fg = fg;
   }
   public Component getTableCellRendererComponent(JTable table, Object 
   value, boolean isSelected, boolean hasFocus, int row, int column) 
   {
      Component cell = super.getTableCellRendererComponent(table, value, 
      isSelected, hasFocus, row, column);
      cell.setBackground(bg);
      cell.setForeground(fg);
      return cell;
   }
}

Output:

MCQPractice competitive and technical Multiple Choice Questions and Answers (MCQs) with simple and logical explanations to prepare for tests and interviews.Read More