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Wed, 31 Oct 2018 09:05:00 GMT

很多人用的都是用�?ROW_NUMBER() OVER()�Q�这�U�方法，对于Derby是不�U�学的�?br />
Derby有自��q��方式�Q�非常简单高效，�q�可以加DESC�{�排�?br />
SELECT * FROM YOUR_TABLE
OFFSET ? ROWS
FETCH NEXT ? ROWS ONLY;

�E�微解释一下：
OFFSET ? ROWS - 是指跌�� ? 条记�?br />FETCH NEXT ? ROWS ONLY - 是指抓取下一�?? 条记�?br />

眼镜�?/a> 2018-10-31 17:05 发表评论

实现JComboBox 下拉菜单鼠标悬停提示功能

Wed, 30 Jul 2014 08:47:00 GMT

1
2 JComboBox comboBoxRow= new JComboBox();
3
4 comboBoxRow.setRenderer(new ListCellRenderer() {
5             private ListCellRenderer renderer = comboBoxRow.getRenderer();
6             public Component getListCellRendererComponent(JList list,
7             Object value, int index, boolean isSelected, boolean cellHasFocus) {
8                 Component component = renderer.getListCellRendererComponent(
9                         list, value, index, isSelected, cellHasFocus);
10                 if (component instanceof JLabel) {
11                     JLabel label = (JLabel) component;
12                     label.setToolTipText(label.getText());
13                 }
14                 return component;
15             }
16         });

眼镜�?/a> 2014-07-30 16:47 发表评论

Swing中可多选下拉框的简单实现[转]

Wed, 30 Jul 2014 08:43:00 GMT

摘要: 实现可多选下拉框需要写三个�c�： MyComboBox.java --- �l�承自JComboBox CheckListCellRenderer.java --- �l�承自JCheckBox�Q�且实现... 阅读全文

眼镜�?/a> 2014-07-30 16:43 发表评论