Java tutorial
/* ======================================================================== * JCommon : a free general purpose class library for the Java(tm) platform * ======================================================================== * * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors. * * Project Info: http://www.jfree.org/jcommon/index.html * * This library is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation; either version 2.1 of the License, or * (at your option) any later version. * * This library 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 Lesser General Public * License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, * USA. * * [Java is a trademark or registered trademark of Sun Microsystems, Inc. * in the United States and other countries.] * * ----------------------- * NumberCellRenderer.java * ----------------------- * (C) Copyright 2000-2004, by Object Refinery Limited. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): -; * * $Id: NumberCellRenderer.java,v 1.7 2007/11/02 17:50:36 taqua Exp $ * * Changes (from 26-Oct-2001) * -------------------------- * 26-Oct-2001 : Changed package to com.jrefinery.ui.*; * 11-Mar-2002 : Updated import statements (DG); * */ package org.jfree.ui; import java.awt.Component; import java.text.NumberFormat; import javax.swing.JTable; import javax.swing.SwingConstants; import javax.swing.table.DefaultTableCellRenderer; /** * A table cell renderer that formats numbers with right alignment in each cell. * * @author David Gilbert */ public class NumberCellRenderer extends DefaultTableCellRenderer { /** * Default constructor - builds a renderer that right justifies the * contents of a table cell. */ public NumberCellRenderer() { super(); setHorizontalAlignment(SwingConstants.RIGHT); } /** * Returns itself as the renderer. Supports the TableCellRenderer interface. * * @param table the table. * @param value the data to be rendered. * @param isSelected a boolean that indicates whether or not the cell is * selected. * @param hasFocus a boolean that indicates whether or not the cell has * the focus. * @param row the (zero-based) row index. * @param column the (zero-based) column index. * * @return the component that can render the contents of the cell. */ public Component getTableCellRendererComponent(final JTable table, final Object value, final boolean isSelected, final boolean hasFocus, final int row, final int column) { setFont(null); final NumberFormat nf = NumberFormat.getNumberInstance(); if (value != null) { setText(nf.format(value)); } else { setText(""); } if (isSelected) { setBackground(table.getSelectionBackground()); } else { setBackground(null); } return this; } }