Button to change bg-color in JTable cell

Question

Hello!
I would like to change the background color of a cell with a klick on a button.
There will be 3 colors, and the selected cell are the only one thats going to change.
How do I do that?
Heres my code:
import javax.swing.*;
import java.awt.Color;
import java.awt.Component;
import java.awt.Rectangle;
import javax.swing.JButton;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
import javax.swing.table.TableModel;
public class Kinna extends JFrame {
     private static final long serialVersionUID = 1L;
     private JPanel jContentPane = null;
     private JTabbedPane jTabbedPane = null;
     private JScrollPane jScrollPane = null;
     private JTable jTable = null;
     private JButton jButtonRed = null;
     private JButton jButtonGreen = null;
     private JButton jButtonBlue = null;
     private JButton jButtonNewWeek = null;
     private JButton jButtonDelWeek = null;
      * This method initializes jTabbedPane     
      * @return javax.swing.JTabbedPane     
     private JTabbedPane getJTabbedPane() {
          if (jTabbedPane == null) {
               jTabbedPane = new JTabbedPane();
               jTabbedPane.setBounds(new Rectangle(105, 45, 545, 488));
               jTabbedPane.addTab(null, null, getJScrollPane(), null);
          return jTabbedPane;
      * This method initializes jScrollPane     
      * @return javax.swing.JScrollPane     
     private JScrollPane getJScrollPane() {
          if (jScrollPane == null) {
               jScrollPane = new JScrollPane();
               jScrollPane.setViewportView(getJTable());
          return jScrollPane;
      * This method initializes jTable     
      * @return javax.swing.JTable     
     private JTable getJTable() {
          if (jTable == null) {
               Object[] head = {"Namn", "M�ndag", "Tisdag", "Onsdag", "Torsdag", "Fredag"};
               Object[][] data = {{"Niklas", "9-15", "9-15", "9-15", "9-15","9-15"},
                                        {"Niklas", "9-15", "9-15", "9-15", "9-15","9-15"}};
               jTable = new JTable(data, head);
                  // This table shades every other column yellow
          return jTable;
      * This method initializes jButtonRed     
      * @return javax.swing.JButton     
     private JButton getJButtonRed() {
          if (jButtonRed == null) {
               jButtonRed = new JButton("R�d");
               jButtonRed.setBounds(new Rectangle(15, 30, 76, 31));
               jButtonRed.setText("R�d");
               jButtonRed.addActionListener(new java.awt.event.ActionListener() {
                    public void actionPerformed(java.awt.event.ActionEvent e) {
          return jButtonRed;
      * This method initializes jButtonGreen     
      * @return javax.swing.JButton     
     private JButton getJButtonGreen() {
          if (jButtonGreen == null) {
               jButtonGreen = new JButton("R�d");
               jButtonGreen.setBounds(new Rectangle(15, 75, 76, 31));
               jButtonGreen.setText("Gr�n");
          return jButtonGreen;
      * This method initializes jButtonBlue     
      * @return javax.swing.JButton     
     private JButton getJButtonBlue() {
          if (jButtonBlue == null) {
               jButtonBlue = new JButton("R�d");
               jButtonBlue.setBounds(new Rectangle(15, 120, 76, 31));
               jButtonBlue.setText("Bl�");
          return jButtonBlue;
      * This method initializes jButtonNewWeek     
      * @return javax.swing.JButton     
     private JButton getJButtonNewWeek() {
          if (jButtonNewWeek == null) {
               jButtonNewWeek = new JButton();
               jButtonNewWeek.setBounds(new Rectangle(270, 0, 91, 31));
               jButtonNewWeek.setText("Ny Vecka");
               jButtonNewWeek.addActionListener(new java.awt.event.ActionListener() {
                    public void actionPerformed(java.awt.event.ActionEvent e) {
                         System.out.println("actionPerformed()");
                         int i = getJTabbedPane().getSelectedIndex() + 1;
                         String tab = "Index: " + i;
                         getJTabbedPane().addTab(tab, new JLabel("Hello"));
                         getJTabbedPane().setSelectedIndex(getJTabbedPane().getTabCount()-1);
          return jButtonNewWeek;
      * This method initializes jButtonDelWeek     
      * @return javax.swing.JButton     
     private JButton getJButtonDelWeek() {
          if (jButtonDelWeek == null) {
               jButtonDelWeek = new JButton();
               jButtonDelWeek.setBounds(new Rectangle(375, 0, 121, 31));
               jButtonDelWeek.setText("Ta bort vecka");
               jButtonDelWeek.addActionListener(new java.awt.event.ActionListener() {
                    public void actionPerformed(java.awt.event.ActionEvent e) {
                         System.out.println("actionPerformed()");
                         getJTabbedPane().removeTabAt(getJTabbedPane().getSelectedIndex());
          return jButtonDelWeek;
      * @param args
     public static void main(String[] args) {
          SwingUtilities.invokeLater(new Runnable() {
               public void run() {
                    Kinna thisClass = new Kinna();
                    thisClass.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                    thisClass.setVisible(true);
      * This is the default constructor
     public Kinna() {
          super();
          initialize();
      * This method initializes this
      * @return void
     private void initialize() {
          this.setSize(670, 580);
          this.setContentPane(getJContentPane());
          this.setTitle("JFrame");
      * This method initializes jContentPane
      * @return javax.swing.JPanel
     private JPanel getJContentPane() {
          if (jContentPane == null) {
               jContentPane = new JPanel();
               jContentPane.setLayout(null);
               jContentPane.add(getJTabbedPane(), null);
               jContentPane.add(getJButtonRed(), null);
               jContentPane.add(getJButtonGreen(), null);
               jContentPane.add(getJButtonBlue(), null);
               jContentPane.add(getJButtonNewWeek(), null);
               jContentPane.add(getJButtonDelWeek(), null);
          return jContentPane;
}  //  @jve:decl-index=0:visual-constraint="29,25"

Answer 1

If you have a different color for every cell in the table, then maybe it would be easier to store a custom Object in the TableModel that has two pieces of information:
a) the text to be displayed
b) the background color of the text.
Then you can write a custom renderer that uses both pieces of information to renderer the cell correctly.
Here is an untested example of what the custom renderer might look like:
class ColorRenderer extends DefaultTableCellRenderer
     public Component getTableCellRendererComponent(
               JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)
          super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
          CustomObject custom = (CustomObject)value;
          setText( custom.getText() );
          if (!isSelected)
               setBackground( custom.getBackground() );
          return this;
}