关于Editor和Renderer的一点认识

　　 

在Sun的官方网站上对Editor和Renderer的解释是如下：
Renderer：

Instead, a single cell renderer is generally used to draw all of the cells that contain the same type of data. You can think of the renderer as a configurable ink stamp that the table uses to stamp appropriately formatted data onto each cell. When the user starts to edit a cell's data, a cell editor takes over the cell, controlling the cell's editing behavior.
个人理解就是对于不同的数据显示不同的格式，相当于在MVC中根据不同的Model选择不同的View，Renderer就是给你这个选择的权利。默认的几种数据的显示方式如下：

Boolean — rendered with a check box.

Number — rendered by a right-aligned label.

Double, Float — same as Number, but the object-to-text translation is performed by a NumberFormat instance (using the default number format for the current locale).

Date — rendered by a label, with the object-to-text translation performed by a DateFormat instance (using a short style for the date and time).

ImageIcon, Icon — rendered by a centered label.

Object — rendered by a label that displays the object's string value.

如果你有特殊的数据，想有特殊的显示方式，可以自己设定Cell的Renderer如下：
TableCellRenderer weirdRenderer = new WeirdRenderer();
table = new JTable(...) {
    public TableCellRenderer getCellRenderer(int row, int column) {
        if ((row == 0) && (column == 0)) {
            return weirdRenderer;
        }
        // else...
        return super.getCellRenderer(row, column);
    }
};
Editor是用于编辑数据，但是Renderer是用于显示数据。
关于Editor，和Renderer遵守相同的法则

原文转自：http://www.ltesting.net