Google Tag Manager

2016/09/28

aterai

Changing JTable header text alignment of specific columns

Code

JTable table2 = makeTable();
table2.getColumnModel().getColumn(0).setHeaderRenderer(
    new HorizontalAlignmentHeaderRenderer(SwingConstants.LEFT));
table2.getColumnModel().getColumn(1).setHeaderRenderer(
    new HorizontalAlignmentHeaderRenderer(SwingConstants.CENTER));
table2.getColumnModel().getColumn(2).setHeaderRenderer(
    new HorizontalAlignmentHeaderRenderer(SwingConstants.RIGHT));

//...
class HorizontalAlignmentHeaderRenderer implements TableCellRenderer {
  private int horizontalAlignment = SwingConstants.LEFT;
  public HorizontalAlignmentHeaderRenderer(int horizontalAlignment) {
    this.horizontalAlignment = horizontalAlignment;
  }
  @Override public Component getTableCellRendererComponent(
      JTable table, Object value, boolean isSelected,
      boolean hasFocus, int row, int column) {
    TableCellRenderer r = table.getTableHeader().getDefaultRenderer();
    JLabel l = (JLabel) r.getTableCellRendererComponent(
        table, value, isSelected, hasFocus, row, column);
    l.setHorizontalAlignment(horizontalAlignment);
    return l;
  }
}

References