JTable header alignment

问题

I would like to set the vertical alignment of the label in the header of my JTable-derrived class.

I am aware of setVerticalAlignment(SwingConstants.BOTTOM);

My header is much higher than the font and I would like to place the text slightly below the vertical centre.

How can I do this, without overriding paint() ?

THX

回答1:

one of ways is to set Renderer, TableHeader by default returns JLabel, for example

  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;
            }
        });

回答2:

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

来源：https://stackoverflow.com/questions/8524037/jtable-header-alignment