Java by API/javax.swing.table/TableModel

TableModel: addTableModelListener(TableModelListener l)

  
import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
public class Main {
  public static void main(String args[]) {
    final Object rowData[][] = { { "1", "one", "I" }, { "2", "two", "II" }, { "3", "three", "III" } };
    final String columnNames[] = { "#", "English", "Roman" };
    final JTable table = new JTable(rowData, columnNames);
    JScrollPane scrollPane = new JScrollPane(table);
    table.getModel().addTableModelListener(new TableModelListener() {
      public void tableChanged(TableModelEvent e) {
         System.out.println(e);
      }
    });
    table.setValueAt("",0,0);
    JFrame frame = new JFrame("Resizing Table");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.add(scrollPane, BorderLayout.CENTER);
    frame.setSize(300, 150);
    frame.setVisible(true);
  }
}

TableModel: getColumnName(int columnIndex)

 
import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableCellRenderer;
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("Tooltip Sample");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    
    JTable table = new JTable(rows, headers);
    JLabel headerRenderer = new DefaultTableCellRenderer();
    String columnName = table.getModel().getColumnName(0);
    headerRenderer.setText(columnName);
    headerRenderer.setToolTipText("Wave");
    
    TableColumnModel columnModel = table.getColumnModel();
    TableColumn column = columnModel.getColumn(0);
    column.setHeaderRenderer((TableCellRenderer) headerRenderer);
    JScrollPane scrollPane = new JScrollPane(table);
    frame.add(scrollPane, BorderLayout.CENTER);
    frame.setSize(300, 150);
    frame.setVisible(true);
  }
}