java - JTable 表头对齐

Question

我想在我的 JTable 派生类的标题中设置标签的垂直对齐方式。

我知道setVerticalAlignment(SwingConstants.BOTTOM);

我的标题比字体高得多，我想将文本放置在垂直中心的下方。

我怎样才能做到这一点，而不覆盖paint()？

谢谢

Answer 1

一种方法是设置Renderer，TableHeader默认返回JLabel，例如

  final TableCellRenderer tcrOs = myTable.getTableHeader().getDefaultRenderer();
       myTable.getTableHeader().setDefaultRenderer(new TableCellRenderer() {

            @Override
            public Component getTableCellRendererComponent(JTable table, 
                   Object value, boolean isSelected, boolean hasFocus, 
                   int row, int column) {
                JLabel lbl = (JLabel) tcrOs.getTableCellRendererComponent(table, 
                      value, isSelected, hasFocus, row, column);
                lbl.setForeground(AppVariables.textColor);
                lbl.setBorder(BorderFactory.createCompoundBorder(lbl.getBorder(), 
                      BorderFactory.createEmptyBorder(0, 5, 0, 0)));
                lbl.setHorizontalAlignment(SwingConstants.LEFT);
                if (isSelected) {
                    lbl.setForeground(Color.red);
                    lbl.setBackground(Color.lightGray);
                } else {
                    lbl.setForeground(Color.blue);
                    lbl.setBackground(Color.black);
                }
                return lbl;
            }
        });

Answer 2

JTableHeader header = table.getTableHeader();
TableCellRenderer renderer = header.getDefaultRenderer();
renderer.setVerticalAlignment(SwingConstants.BOTTOM);