Question

我想更改JTable上所选列标题的字体。我尝试在我的ColumnHeaderRenderer上执行此操作，如下所示：

public class ColumnHeaderRenderer extends JLabel implements TableCellRenderer {

public ColumnHeaderRenderer(JTable table) {
    JTableHeader header = table.getTableHeader();
    setOpaque(true);
    setBorder(BorderFactory.createEtchedBorder());
    setHorizontalAlignment(CENTER);
    setForeground(header.getForeground());
    setBackground(header.getBackground());
    setFont(header.getFont());
    setPreferredSize(new Dimension(0, 25));

}

public Component getTableCellRendererComponent(JTable table, Object value,
        boolean isSelected, boolean hasFocus, int row, int column) {

    Color bg = UIManager.getColor("TableHeader.background");
    int selectedColumn = table.getSelectedColumn();
    if (selectedColumn == column){
        bg = new Color(107, 142, 35);
        setFont(getFont().deriveFont(Font.BOLD));// !!!!trying to do it here!!!!
    }
    setBackground(bg);
    setText(value.toString());
    return this;
}

}

但结果是所有列标题字体都被更改了。那么如何才能为所选列更改它？

Answer 1

您需要重置值

if (selectedColumn == column){
    bg = new Color(107, 142, 35);
    setFont(getFont().deriveFont(Font.BOLD));// !!!!trying to do it here!!!!
} else {
    setFont(UIManager.getFont("TableHeader.font"));
}

渲染是共享资源，因此所有标头共享相同的渲染。这意味着如果您将渲染器的状态从一个传递更改为另一个传递，则使用渲染渲染的下一个元素将获得您之前使用的所有属性...

JTable-如何更改特定列标题的Font

1 个答案: