Java JTable Column ensureColumnCount(int count, JTable table)

Description

Method checks if the column count is greater or equal to specified count, if not - it add a column

License

Open Source License

Parameter

Parameter	Description
table	a parameter

Declaration

public static void ensureColumnCount(int count, JTable table) 

Method Source Code

//package com.java2s;
/*//from  w  w w  .  ja  v  a 2s  . c o  m
* Open-Source tuning tools
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

import javax.swing.JTable;

import javax.swing.table.DefaultTableModel;

public class Main {
    /**
     * Method checks if the column count is greater or equal to specified count, if not - it add a column
     * @param count, number of columns to check for
     * @param table
     */
    public static void ensureColumnCount(int count, JTable table) {
        if (count <= table.getColumnCount())
            return;
        int[] minwidth = new int[count];
        int[] maxwidth = new int[count];
        int[] prefwidth = new int[count];
        int i, j;
        for (i = 0; i < table.getColumnCount(); ++i) {
            minwidth[i] = table.getColumnModel().getColumn(i).getMinWidth();
            maxwidth[i] = table.getColumnModel().getColumn(i).getMaxWidth();
            prefwidth[i] = table.getColumnModel().getColumn(i).getPreferredWidth();
        }
        DefaultTableModel model = (DefaultTableModel) table.getModel();
        for (i = table.getColumnCount(); i < count; ++i) {
            model.addColumn("");
            minwidth[i] = minwidth[i - 1];
            maxwidth[i] = maxwidth[i - 1];
            prefwidth[i] = prefwidth[i - 1];
            for (j = 0; j < table.getRowCount(); ++j)
                table.setValueAt("", j, i);
        }
        for (i = 0; i < count; ++i) {
            table.getColumnModel().getColumn(i).setMinWidth(minwidth[i]);
            table.getColumnModel().getColumn(i).setMaxWidth(maxwidth[i]);
            table.getColumnModel().getColumn(i).setPreferredWidth(prefwidth[i]);
        }
    }
}

Related

1. convertColumnIndexToView(TableColumnModel model, int modelCol)
2. convertSelectedColumnsToModelIndices(JTable table, int[] columns)
3. createColumnNames(TableModel model)
4. createDefaultTableModel(String[] columnNames)
5. createUneditableTableModel(String... columnNames)
6. filterTable(JTable table, DefaultTableModel dtm, String text, int[] columns, boolean forceRegEx)
7. findColumn(TableModel m, String columnName)
8. findColumn(TableModel model, String name)
9. fitColumns(JTable table)