Java by API/javax.swing.table/TableCellRenderer

extends JSlider implements TableCellRenderer

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.ruponent;
import java.awt.GridLayout;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.EventObject;
import java.util.Vector;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JSlider;
import javax.swing.JTable;
import javax.swing.JWindow;
import javax.swing.SwingConstants;
import javax.swing.event.CellEditorListener;
import javax.swing.event.ChangeEvent;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;
public class MainClass extends JFrame {
  public MainClass() {
    super("Customer Editor Test");
    setSize(600, 160);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    MixerModel test = new MixerModel();
    JTable jt = new JTable(test);
    jt.setDefaultRenderer(Volume.class, new VolumeRenderer());
    JScrollPane jsp = new JScrollPane(jt);
    getContentPane().add(jsp, BorderLayout.CENTER);
  }
  public static void main(String args[]) {
    MainClass mt = new MainClass();
    mt.setVisible(true);
  }
}
class MixerModel extends AbstractTableModel {
  String headers[] = { "Track", "Start", "Stop", "Left Volume", "Right Volume" };
  Class columnClasses[] = { String.class, String.class, String.class, Volume.class, Volume.class };
  Object data[][] = { { "Bass", "0:00:000", "1:00:000", new Volume(56), new Volume(56) },
      { "Strings", "0:00:000", "0:52:010", new Volume(72), new Volume(52) },
      { "Brass", "0:08:000", "1:00:000", new Volume(99), new Volume(0) },
      { "Wind", "0:08:000", "1:00:000", new Volume(0), new Volume(99) }, };
  public int getRowCount() {
    return data.length;
  }
  public int getColumnCount() {
    return headers.length;
  }
  public Class getColumnClass(int c) {
    return columnClasses[c];
  }
  public String getColumnName(int c) {
    return headers[c];
  }
  public boolean isCellEditable(int r, int c) {
    return true;
  }
  public Object getValueAt(int r, int c) {
    return data[r][c];
  }
  public void setValueAt(Object value, int r, int c) {
    if (c >= 3) {
      ((Volume) data[r][c]).setVolume(value);
    } else {
      data[r][c] = value;
    }
  }
}
class Volume {
  private int volume;
  public Volume(int v) {
    setVolume(v);
  }
  public Volume() {
    this(50);
  }
  public void setVolume(int v) {
    volume = (v < 0 ? 0 : v > 100 ? 100 : v);
  }
  public void setVolume(Object v) {
    if (v instanceof String) {
      setVolume(Integer.parseInt((String) v));
    } else if (v instanceof Number) {
      setVolume(((Number) v).intValue());
    } else if (v instanceof Volume) {
      setVolume(((Volume) v).getVolume());
    }
  }
  public int getVolume() {
    return volume;
  }
  public String toString() {
    return String.valueOf(volume);
  }
}
class VolumeRenderer extends JSlider implements TableCellRenderer {
  public VolumeRenderer() {
    super(SwingConstants.HORIZONTAL);
    setSize(115, 15);
  }
  public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected,
      boolean hasFocus, int row, int column) {
    if (value == null) {
      return this;
    }
    if (value instanceof Volume) {
      setValue(((Volume) value).getVolume());
    } else {
      setValue(0);
    }
    return this;
  }
}

implements TableCellRenderer

import java.awt.BorderLayout;
import java.awt.ruponent;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.border.Border;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
public class MainClass {
  public static void main(String args[]) {
    String rows[][] = { { "A", "a" }, { "B", "b" }, { "E", "e" } };
    String headers[] = { "Upper", "Lower" };
    JFrame frame = new JFrame("Label Header");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JTable table = new JTable(rows, headers);
    JScrollPane scrollPane = new JScrollPane(table);
    Border headerBorder = UIManager.getBorder("TableHeader.cellBorder");
    JLabel headerLabel1 = new JLabel(headers[0], JLabel.CENTER);
    headerLabel1.setBorder(headerBorder);
    JLabel headerLabel2 = new JLabel(headers[1], JLabel.CENTER);
    headerLabel2.setBorder(headerBorder);
    TableCellRenderer renderer = new JComponentTableCellRenderer();
    TableColumnModel columnModel = table.getColumnModel();
    TableColumn column0 = columnModel.getColumn(0);
    TableColumn column1 = columnModel.getColumn(1);
    column0.setHeaderRenderer(renderer);
    column0.setHeaderValue(headerLabel1);
    column1.setHeaderRenderer(renderer);
    column1.setHeaderValue(headerLabel2);
    frame.add(scrollPane, BorderLayout.CENTER);
    frame.setSize(300, 150);
    frame.setVisible(true);
  }
}
class JComponentTableCellRenderer implements TableCellRenderer {
  public Component getTableCellRendererComponent(JTable table, Object value, 
      boolean isSelected, boolean hasFocus, int row, int column) {
    return (JComponent)value;
  }
}