Java生成自定义控件源代码，颜色选择下拉框演示，带图标下拉框的单元绘制器,从JLabel类扩展,实现ListCellRenderer接口，采用Object二维数组,用于初始化下拉框,参数依次为图标,显示文本,提示文本-Java source code to generate a custom control, color selection drop-down box demo unit with a the icons drop-down box to draw from the JLabel class extension to achieve ListCellRenderer interface using Object dimensional array, used to initialize the drop-down box, the parameter order of the icon to display the text, prompt text