Union Data Table Example : Grid Table « Swing Components « Java

Union Data Table Example

Union Data Table Example
// Example from http://www.crionics.com/products/opensource/faq/swing_ex/SwingExamples.html

/* (swing1.1beta3) */

import java.awt.Container;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.util.Vector;

import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JSeparator;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.SwingConstants;
import javax.swing.event.TableModelEvent;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.DefaultTableModel;

 * @version 1.0 11/09/98
public class UnionDataExample extends JFrame {

  UnionDataExample() {
    super("UnionData Example");
    setSize(300, 200);

    final String[] headers = { "a", "b", "c", "d" };
    final String[][] data = new String[6][headers.length];

    final AbstractTableModel dmAB = new AbstractTableModel() {
      public int getRowCount() {
        return data.length;

      public int getColumnCount() {
        return headers.length;

      public String getColumnName(int col) {
        return headers[col];

      public Object getValueAt(int row, int col) {
        return data[row][col];

    final int rowCountA = 3;
    DefaultTableModel dmA = new DefaultTableModel(data, headers) {
      public int getRowCount() {
        return rowCountA;

      public Object getValueAt(int row, int col) {
        Vector rowVector = (Vector) dataVector.elementAt(row);
        return rowVector.elementAt(col);

      public void setValueAt(Object value, int row, int col) {
        data[row][col] = (String) value;
        Vector rowVector = (Vector) dataVector.elementAt(row);
        rowVector.setElementAt(value, col);
        TableModelEvent event = new TableModelEvent(this, row, row, col);

    DefaultTableModel dmB = new DefaultTableModel(data, headers) {
      public int getRowCount() {
        return rowCountA;

      //public int getRowCount() { return data.length - rowCountA; }
      public Object getValueAt(int row, int col) {
//        Vector rowVector = (Vector) dataVector.elementAt(row
  //          + rowCountA);
        Vector rowVector = (Vector) dataVector.elementAt(2);
        return rowVector.elementAt(col);

      public void setValueAt(Object value, int row, int col) {
        int sRow = row + rowCountA;
        data[sRow][col] = (String) value;
        Vector rowVector = (Vector) dataVector.elementAt(sRow);
        rowVector.setElementAt(value, col);
        TableModelEvent event = new TableModelEvent(this, sRow, sRow,

    JScrollPane scrollA = new JScrollPane(new JTable(dmA));
    JScrollPane scrollB = new JScrollPane(new JTable(dmB));
    JScrollPane scrollAB = new JScrollPane(new JTable(dmAB));

    Box box = new Box(BoxLayout.Y_AXIS);
    box.add(new JLabel("Table A"));
    box.add(new JSeparator(SwingConstants.VERTICAL));
    box.add(new JLabel("Table B"));
    Box boxAB = new Box(BoxLayout.Y_AXIS);
    boxAB.add(new JLabel("Table A + B"));
    Container content = getContentPane();
    content.setLayout(new BoxLayout(content, BoxLayout.X_AXIS));
    content.add(new JSeparator(SwingConstants.HORIZONTAL));

  public static void main(String[] args) {
    UnionDataExample frame = new UnionDataExample();
    frame.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {


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