[jtable]设置复选框前景色与背景色

最新推荐文章于 2021-08-13 10:33:40 发布

原创最新推荐文章于 2021-08-13 10:33:40 发布 · 846 阅读

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#JCombobox #jtable #Java EE #Swing

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本文介绍如何为 JComboBox 控件创建自定义渲染器，并通过不同状态改变其背景颜色和文字颜色，实现美观且功能丰富的下拉列表显示效果。

//表JComboBox数据

 String[] status = { "启用", "禁用", "停用" };
  JComboBox com = new JComboBox(status);
  JComboBoxRenderer select=new JComboBoxRenderer();
  com.setRenderer(select);

//ListCellRenderer监听

 class JComboBoxRenderer extends JLabel implements ListCellRenderer  {
		 public JComboBoxRenderer() {
	         setOpaque(true);
	     }
	     public Component getListCellRendererComponent(JList list,
	                                                   Object value,
	                                                   int index,
	                                                   boolean isSelected,
	                                                   boolean cellHasFocus) {
	         setText(value.toString());
	         Color background;
	         Color foreground;
	         // check if this cell represents the current DnD drop location
	         JList.DropLocation dropLocation = list.getDropLocation();
	         if (dropLocation != null
	                 && !dropLocation.isInsert()
	                 && dropLocation.getIndex() == index) {

	             background = Color.BLUE;
	             foreground = Color.WHITE;
	         // check if this cell is selected
	         } else if (isSelected) {
	             background = Color.RED;	        
	             foreground = Color.WHITE;
	         // unselected, and not the DnD drop location
	         } else {
	             background = Color.yellow;
	             foreground = Color.BLACK;
	         };
	         setBackground(background);
	         setForeground(foreground);

	         return this;
	     }

	}