Set the color of a row in a JTable

Hi all
I need to set the color of a line (or simply a cell) in a JTable to a specific color,
I read these pages:

http://StackOverflow.com/questions/1057710/how-to-set-the-colour-of-my-1st-row-in-my-JTable-to-yellowor-any-colour
http://www.roseindia.NET/Java/example/Java/Swing/SadingRows.shtml
http://StackOverflow.com/questions/3875607/change-the-background-color-of-a-row-in-a-JTable
http://www.codeguru.com/Forum/archive/index.php/t-34478.html
http://www.thatsjava.com/Java-Swing/16549/

and lots and lots of links like these... all of them are too complicated and HARD...
What I need, it's too simple: pick a line and then set the color red for example...
Can you help me please...

I need the simplest code possible

Thank you very much

{/ / Here a Question: this is the beginning of the block what?} Method? class? where is the name?

It's what we call a "class internal annonymous. Its extension JTable and similar to the override of the prepareRenderer() method if you do not need a separate source file.

This method returns a component... while I was expecting, it does the job and returns nothing (void)...

The code is substituting a JTable method defined in the API.

It seems that these codes CREATE a JTable with a custom look, whereas what I need is to EDIT and CHANGE a JTable that is ALREADY CREATED

Custom made is a design time decision. That is, you need to create and implement an API at design which allows to dynamically change the rendering at runtime. The default API does not support line-level rendering which is why you need to create your own API to do this.

I need to set the color of a line (or simply a cell) in a JTable to a specific color,

Converters of work by making the data contained in a table cell. If you want a rendering engine, a cell or a row of a table a different color, so you need to store this information somewhere so that the rendering engine knows what to do.

If you feared strictly for color lines, then approach you could do is create acard. When you want a row to be a specific color, then you add and entry to the map. The best way to use this information would override the method prepareRenderer() to check the card each time to see if a custom color is for the line to be renderered.

Here is a simple example of a simple API added to the JTable which lets you row rendered level:

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

public class RowTable extends JTable
{
     Map rowColor = new HashMap();

     public RowTable(TableModel model)
     {
          super(model);
     }

     @Override
     public Component prepareRenderer(TableCellRenderer renderer, int row, int column)
     {
          Component c = super.prepareRenderer(renderer, row, column);

          if (!isRowSelected(row))
          {
               Color color = rowColor.get( row );
               c.setBackground(color == null ? getBackground() : color);
          }

          return c;
     }

     public void setRowColor(int row, Color color)
     {
          rowColor.put(row, color);
     }

     public static void main(String[] args)
     {
          DefaultTableModel model = new DefaultTableModel(10, 4);
          RowTable table = new RowTable( model );
          table.setPreferredScrollableViewportSize(table.getPreferredSize());

          table.setRowColor(1, Color.YELLOW);
          table.setRowColor(4, Color.RED);
          table.setRowColor(7, Color.ORANGE);

          JFrame frame = new JFrame();
          frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
          frame.add( new JScrollPane( table ) );
          frame.pack();
          frame.setLocationRelativeTo( null );
          frame.setVisible(true);
     }
}

Tags: Java

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