Redisplay New JTable and Columns

[jcman01]

I am working on a little side project for myself. I want to enter some input in a text area (SQL statement), and receive the results in the output pane (Jtable). However, I cannot get it to work. The following should be runnable by anyone. Can someone tell me what I need to do to get the new column labels (a,b,c) to show when I select the Run SQL menu item?


import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.table.AbstractTableModel;
import javax.swing.JMenuItem;
import javax.swing.JTable;

public class ADemo extends JPanel implements ActionListener {
private JTable table;
private JSplitPane splitPane;
private JTextArea textArea;
private JFrame frame;
private JMenuBar jmenubar;
private JMenu jmenu;
private JMenuItem jmenuitemRun;
private JMenuItem jmenuitemExit;
private JScrollPane SQLtextScrollPane;
private JScrollPane resultsScrollPane;
private static final long serialVersionUID = 1L;

private String[] columnNames = {"init"};
private Object[][] data = {{" "}};
private TableColumn column;



public ADemo() {
frame = new JFrame("ADemozzz");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOS E);

textArea = new JTextArea();
textArea.setColumns(80);
textArea.setRows(25);

table = new JTable(new initialTableModel());
table.setPreferredScrollableViewportSize(new Dimension(5, 120));
table.setFillsViewportHeight(true);

SQLtextScrollPane = new JScrollPane(textArea);
resultsScrollPane = new JScrollPane(table);

splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT,SQLtextScroll Pane,resultsScrollPane);
splitPane.setDividerLocation(0.5);
splitPane.setSize(new Dimension(500, 500));


jmenubar = new JMenuBar();
jmenu = new JMenu("File");
jmenuitemRun = new JMenuItem("Run SQL");
jmenuitemExit = new JMenuItem("Exit");
jmenu.add(jmenuitemRun);
jmenu.addSeparator();
jmenu.add(jmenuitemExit);
jmenubar.add(jmenu);
jmenuitemRun.addActionListener(this);

frame.setJMenuBar(jmenubar);
frame.getContentPane().add(splitPane);
frame.setExtendedState(JFrame.MAXIMIZED_BOTH);
frame.pack();
frame.setVisible(true);
}


class initialTableModel extends AbstractTableModel {
private static final long serialVersionUID = 1L;

public int getColumnCount() {
return columnNames.length;
}

public int getRowCount() {
return data.length;
}

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

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


public void actionPerformed(ActionEvent ae) {
runSQL();
}


public void runSQL() {
columnNames = new String[3];
columnNames[0] = "a";
columnNames[1] = "b";
columnNames[2] = "c";

table = new JTable(new initialTableModel());
table.repaint();
}



public static void main(String[] args) throws Exception {
ADemo f = new ADemo();
}
}

[camickr]

Don't use the "Bold" tags to highlight your code. Instead use the "Code" tags.

Don't recreate the table, just change the TableModel:

//table = new JTable(new initialTableModel());
//table.repaint();
table.setModel( new initialTableModel() );

Also, there is no need for you to create a custom TableModel. Instead use the DefaultTableModel and save yourself some work.

[jcman01]

That did the trick! Thanks.