Mega Code Archive
Creating a Class-Based Custom Cell Renderer in a JTable Component
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import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;
public class Main {
public static void main(String[] argv) {
DefaultTableModel model = new DefaultTableModel() {
public Class getColumnClass(int mColIndex) {
int rowIndex = 0;
Object o = getValueAt(rowIndex, mColIndex);
if (o == null) {
return Object.class;
} else {
return o.getClass();
}
}
};
JTable table = new JTable(model);
model.addColumn("Col1", new Object[] { Color.red });
model.addRow(new Object[] { Color.green });
model.addRow(new Object[] { Color.blue });
table.setDefaultRenderer(Color.class, new ColorTableCellRenderer());
JFrame f = new JFrame();
f.setSize(300,300);
f.add(new JScrollPane(table));
f.setVisible(true);
}
}
class ColorTableCellRenderer extends JLabel implements TableCellRenderer {
Color curColor;
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected,
boolean hasFocus, int rowIndex, int vColIndex) {
if (curColor instanceof Color) {
curColor = (Color) value;
} else {
curColor = table.getBackground();
}
return this;
}
public void paint(Graphics g) {
g.setColor(curColor);
g.fillRect(0, 0, getWidth() - 1, getHeight() - 1);
}
}
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