Creating a Class-Based Custom Cell Renderer in a JTable Component : JTable Renderer Editor « Swing « Java Tutorial

1. Java Tutorial
2. Swing
3. JTable Renderer Editor

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);
  }
}

14.60.JTable Renderer Editor
	14.60.1.	Get Default cell Renderer
	14.60.2.	Get Default Cell Editor
	14.60.3.	Default Editors and Renderers
	14.60.4.	Rendering Table Cells: To install the renderer as the default renderer for the JTable for Object.class
	14.60.5.	implements TableCellRenderer
	14.60.6.	extends DefaultCellEditor
	14.60.7.	Cell Renderer for the Gender Column
	14.60.8.	Demonstrates the editable property of Swing tables.
	14.60.9.	An Editor for the Gender Column
	14.60.10.	ColorChooserEditor
	14.60.11.	Using a JComboBox in a Cell in a JTable Component
	14.60.12.	Editing Table Cells: JComboBox As Table Cell Renderer
	14.60.13.	Using a List JSpinner as a Cell Editor in a JTable Component
	14.60.14.	Using default Boolean value cell editor and renderer
	14.60.15.	Creating a Class-Based Custom Cell Renderer in a JTable Component
	14.60.16.	Creating a Custom Cell Renderer in a JTable Component
	14.60.17.	Preventing Invalid Values in a Cell in a JTable Component
	14.60.18.	Using Built-In Cell Renderers and Editors in a JTable Component
	14.60.19.	Save the current value in the cell being edited and stops the editing process
	14.60.20.	Discard any changes made by the user and stops the editing process