Do not set background to JButton. Use JPanel to wrap JButton and set background to JPanel. This would be probably obvious if you used more buttons in one JTable column.
To set correct background color of JPanel i did (you should):
- Keep reference to original renderer
- Let original renderer render its own component (for every rendering)!
- Use background of rendered component to set background of JPanel (for every rendering)!
This way you don't have to choose correct color yourself
Also you have to override paintComponent to correctly paint white background of JPanel:
@Override
protected void paintComponent(Graphics g) {
Color background = getBackground();
setBackground(new Color(background.getRGB()));
super.paintComponent(g);
}
Edit: as @kleopatra suggests you don't have to override paintComponent, only set background color as not-uiresource (shown in complete example)
Here is complete example:
import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.UIManager.LookAndFeelInfo;
import javax.swing.table.TableCellRenderer;
public class Test {
public static void main(String[] args) throws Throwable {
for (LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
UIManager.setLookAndFeel(info.getClassName());
break;
}
}
String[] columnNames = new String[]{"c1"};
Object[][] data = new Object[4][1];
data[0][0] = "First";
data[1][0] = "Second";
data[2][0] = "Third";
data[3][0] = "Fourth";
JTable table = new JTable(data, columnNames){
@Override
public javax.swing.table.TableCellRenderer getCellRenderer(int row, int column) {
final TableCellRenderer ori = super.getCellRenderer(row, column);
final TableCellRenderer mine = new TableCellRenderer() {
@Override
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {
Component c = ori.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
JPanel p = new JPanel();
if(value == null){
value = "";
}
p.add(new JButton(value.toString()));
p.setBackground(new Color(c.getBackground().getRGB()));
return p;
}
};
return mine;
};
};
table.setRowHeight(50);
JFrame f = new JFrame();
f.add(table);
f.setVisible(true);
f.pack();
}
}
Result: