JScrollPaneについて

package sample;

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.AdjustmentEvent;
import java.awt.event.AdjustmentListener;

import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.DefaultCellEditor;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollBar;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.ScrollPaneConstants;
import javax.swing.SwingUtilities;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumn;

import edu.ucla.loni.inspector.manager.ScrollBarManager;

public class SampleTable extends JFrame implements ActionListener {

        private JComboBox comboBox;
        private JTable table1;
        private JTable table2;
        private DefaultTableModel tableModel1;
        private DefaultTableModel tableModel2;
        private JScrollPane scrollPane1;
        private JScrollPane scrollPane2;
        private JButton button;
        private JPanel panel;
        private Box tableBox;

        // Constants.
        private final String COMBO_BOX_TITLE  = "Files";
        private final String[] COLUMN_NAMES   = {"Column1", "Column2", "Column3"};
        private final int FIRST_COLUMN        = 0;
        private final int SECOND_COLUMN       = 1;
        private final int THIRD_COLUMN        = 2;
        private final int FIRST_THREE_COLUMNS = 3;
        private final String ADD_COLUMN       = "Add Column";
        private final int COLUMN_WIDTH        = 150;

        public SampleTable() {
                setBounds(10,10,700,700);

                setTables();
                       tableBox = new Box(BoxLayout.Y_AXIS);
                tableBox.add(scrollPane1);
                tableBox.add(scrollPane2);

                button = new JButton(ADD_COLUMN);

                panel = new JPanel();
                panel.add(button);
                button.addActionListener(this);
                button.setActionCommand(ADD_COLUMN);

                // Add conponents.
                getContentPane().add(new JPanel(),BorderLayout.NORTH);  // <---  ここをNORTHにするか、CENTERにするかでRowの表示枠サイズが変化
                getContentPane().add(tableBox,BorderLayout.CENTER);     // <---  ここをNORTHにするか、CENTERにするかでRowの表示枠サイズが変化
                getContentPane().add(panel,BorderLayout.SOUTH);
                       setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

                // Not called from EDT.
                SwingUtilities.invokeLater(new Runnable() {
                        public void run() {
                                setVisible(true);
                        }
                });
        }

        private void setTables() {
                // Set table 1 ------------------------------------------------->
                tableModel1 = new DefaultTableModel(1,1);
                tableModel1.setValueAt(COMBO_BOX_TITLE, 0, 0);
                table1 = new JTable(tableModel1);
                table1.setTableHeader(null);
                table1.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);

                int width = COLUMN_WIDTH * FIRST_THREE_COLUMNS;
//                table1.getColumnModel().getColumn(FIRST_COLUMN).setWidth(width);
                table1.getColumnModel().getColumn(FIRST_COLUMN).setPreferredWidth(width);
                table1.getColumnModel().getColumn(FIRST_COLUMN).setMinWidth(width);
                table1.getColumnModel().getColumn(FIRST_COLUMN).setMaxWidth(width);

                // Set a view port size.
//              table1.setPreferredScrollableViewportSize(new Dimension(400,10)); <---- 特定Rowの表示

                // Set JComboBox as an editor.
                TableColumn fileColumn = table1.getColumnModel().getColumn(FIRST_COLUMN);
                comboBox = new JComboBox();
                comboBox.addItem(COMBO_BOX_TITLE);
                fileColumn.setCellEditor(new DefaultCellEditor(comboBox));

                // end of set table 1 <------------------------------------------

                // Set table 2 ------------------------------------------------->
                tableModel2 = new DefaultTableModel(COLUMN_NAMES,0);
                table2 = new JTable(tableModel2);
                table2.getTableHeader().setReorderingAllowed(false);
                table2.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);

                // First column.
//                table2.getColumnModel().getColumn(FIRST_COLUMN).setWidth(COLUMN_WIDTH);
                table2.getColumnModel().getColumn(FIRST_COLUMN).setPreferredWidth(COLUMN_WIDTH);
                table2.getColumnModel().getColumn(FIRST_COLUMN).setMinWidth(COLUMN_WIDTH);
                table2.getColumnModel().getColumn(FIRST_COLUMN).setMaxWidth(COLUMN_WIDTH);

                // Second column.
//                table2.getColumnModel().getColumn(SECOND_COLUMN).setWidth(COLUMN_WIDTH);
                table2.getColumnModel().getColumn(SECOND_COLUMN).setPreferredWidth(COLUMN_WIDTH);
                table2.getColumnModel().getColumn(SECOND_COLUMN).setMinWidth(COLUMN_WIDTH);
                table2.getColumnModel().getColumn(SECOND_COLUMN).setMaxWidth(COLUMN_WIDTH);

                // Third column.
//              table2.getColumnModel().getColumn(THIRD_COLUMN).setWidth(COLUMN_WIDTH);
                table2.getColumnModel().getColumn(THIRD_COLUMN).setPreferredWidth(COLUMN_WIDTH);
                table2.getColumnModel().getColumn(THIRD_COLUMN).setMinWidth(COLUMN_WIDTH);
                table2.getColumnModel().getColumn(THIRD_COLUMN).setMaxWidth(COLUMN_WIDTH);

                // end of set table 2 <------------------------------------------

                // Set tables in a JScrollPane.
                scrollPane1 = new JScrollPane(table1);
                scrollPane1.setPreferredSize(new Dimension(400,20)); <---- 特定Rowの表示
                scrollPane1.setVerticalScrollBarPolicy(
                       ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER);
                scrollPane1.setHorizontalScrollBarPolicy(
                       ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
                scrollPane2 = new JScrollPane(table2);
                scrollPane2.setPreferredSize(new Dimension(400,480));
                // Make scroll simultaneous.
           
                final JScrollBar scrollBar1 = scrollPane1.getHorizontalScrollBar();
                JScrollBar scrollBar2 = scrollPane2.getHorizontalScrollBar();
                scrollBar2.addAdjustmentListener(new AdjustmentListener() {
                    public void adjustmentValueChanged(AdjustmentEvent e) {
                       scrollBar1.setValue(e.getValue());
                    }
                });
        }

        public void actionPerformed(ActionEvent e) {
                String command = e.getActionCommand();
                if(command.equals(ADD_COLUMN)){
                        TableColumn column2 = new TableColumn();
                        table2.getColumnModel().addColumn(column2);
                        int resizeWidth = 0;
                        for(int i=FIRST_COLUMN;i<FIRST_THREE_COLUMNS;i++){
                                resizeWidth += table2.getColumnModel().getColumn(i).getWidth();
                        }

                        TableColumn column = new TableColumn();
                        table1.getColumnModel().addColumn(column);
                        table1.getColumnModel().getColumn(FIRST_COLUMN).setPreferredWidth(resizeWidth);
                }
        }

        public static void main(String[] args) {
                // Convention for starting Swing application?
                SwingUtilities.invokeLater(new Runnable() {
                        public void run() {
                                SampleTable st = new SampleTable();
                        }
                });
        }

}