Author: Nobuo Tamemasa

Use a single (data) model to display different views in different tables.

// File: UnionDataExample.java
/* (swing1.1beta3) */
//package jp.gr.java_conf.tame.swing.examples;

import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.event.*;

/**
 * @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);
        fireTableChanged(event);
        dmAB.fireTableChanged(event);
      }
    };
    
    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);
        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, col);
        fireTableChanged(event);
        dmAB.fireTableChanged(event);
      }
    };
    
    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(scrollA); 
    box.add(new JSeparator(SwingConstants.VERTICAL));
    box.add(new JLabel("Table B")); 
    box.add(scrollB);     
    Box boxAB = new Box(BoxLayout.Y_AXIS);
    boxAB.add(new JLabel("Table A + B")); 
    boxAB.add(scrollAB);      
    Container content = getContentPane();
    content.setLayout(new BoxLayout(content,BoxLayout.X_AXIS));
    content.add(box);  
    content.add(new JSeparator(SwingConstants.HORIZONTAL));
    content.add(boxAB);  
  }

  public static void main(String[] args) {
    UnionDataExample frame = new UnionDataExample();
    frame.addWindowListener( new WindowAdapter() {
      public void windowClosing( WindowEvent e ) {
        System.exit(0);
      }
    });
    frame.setVisible(true);
  }
}

Posted On: 3-Jan-1999

internet.commerce