import javax.swing.*; 
import javax.swing.event.TableModelEvent; 
import javax.swing.event.TableModelListener; 
import javax.swing.table.AbstractTableModel; 
import javax.swing.table.DefaultTableModel; 
import javax.swing.table.TableModel; 
import java.awt.*; 
import java.util.Random; 

public class ChainedModelTester { 


public static void main(String[] args) throws InterruptedException { 
final String[] columnNames = {"Name1", "Name2", "Name3", "Name4", "Name5"}; 
final TableModel tm1 = new DefaultTableModel(new Object[][] {{"foo", "bar", "baz", "bat", "boz"}}, columnNames); 
TableModel kvM = new KeyValueModel(tm1, 4); 
JTable table = new JTable(kvM); 
JFrame parent = new JFrame("Key Values"); 
parent.setLayout(new FlowLayout()); 
parent.add(table); 
JWindow window = new JWindow(parent); 
table.setSize(500,300); 
parent.pack(); 
parent.setVisible(true); 
Thread.sleep(1000); 
final Random r = new Random(); 
for (int i = 0; i< 1000; i++) { 
final int typeIdx = i % (columnNames.length - 1); 
SwingUtilities.invokeLater(new Runnable() { 
@Override 
public void run() { 
final String aValue = String.valueOf(r.nextInt(1000)); 
tm1.setValueAt(aValue, 0, typeIdx); 
} 
}); 
Thread.sleep(1000); 
} 

} 

//Shows a subset of the columns in another model as key/value pairs 
static class KeyValueModel extends AbstractTableModel { 
TableModel sourceModel; 
final int firstN; 
KeyValueModel(final TableModel sourceModel, final int firstN) { 


if (firstN < 1 || firstN > sourceModel.getColumnCount()) { 
throw new IllegalArgumentException("Illegal firstN "+firstN); 
} 
this.firstN = firstN; 
this.sourceModel = sourceModel; 

sourceModel.addTableModelListener(new TableModelListener() { 
@Override 
public void tableChanged(TableModelEvent e) { 
int col = e.getColumn(); 
if (col < firstN) { 
//	fireTableDataChanged(); 
fireTableRowsUpdated(col,col); 
} else { 
System.out.println("Out of range "+col); 
} 

} 
}); 
} 

@Override 
public int getRowCount() { 
return firstN; 
} 

@Override 
public int getColumnCount() { 
return 2; 
} 

@Override 
public Object getValueAt(int rowIndex, int columnIndex) { 
if (columnIndex == 0) { 
return sourceModel.getColumnName(rowIndex); 
} else { 
return sourceModel.getValueAt(0, rowIndex); 
} 
} 

} 

}