Question

我想用defaulttablemodel BOLD制作jtable的标题。这是我的代码

class TablePanel extends JPanel {

    private String[] COLUMNS = {"FAMILY MEMBERS", "STAR (NAKSHATRA)"};
       private DefaultTableModel model = new DefaultTableModel(COLUMNS, 0){

        public boolean isCellEditable(int row, int column) {
                return false;
           }

       };
       DefaultTableCellRenderer centerRenderer = new DefaultTableCellRenderer(){

        public void setHorizontalAlignment(int alignment) {
               alignment = (int) CENTER_ALIGNMENT;
           };

       };
       public JTable table = new JTable(model){
         public void setDefaultRenderer(java.lang.Class<?> columnClass, TableCellRenderer renderer) {
             columnClass= String.class;
             renderer=centerRenderer;
         };  
         public void setBackground(Color bg) {
             bg = Color.yellow;
         };

       };

我想让列标题为BOLD。任何关于此的提示都表示赞赏

Answer 1

奇怪的是，表格列标题使用与表格相同的概念来渲染...

DefaultTableCellRenderer header = new DefaultTableCellRenderer();
header.setFont(header.getFont().deriveFont(Font.BOLD));
JTable table = new JTable();
TableColumnModel model = table.getColumnModel();
model.getColumn(0).setHeaderRenderer(header);

例如。但我认为它不会像你想要的那样......

相反，你可以试试像......

DefaultTableModel model = new DefaultTableModel(new Object[]{"<html><b>Happy</b></html>", "Sad"}, 0);
JTable table = new JTable(model);

enter image description here

Answer 2

渲染器中自定义视觉的清洁（比@ Mad的）策略是围绕默认设置实现包装渲染器：它将所有配置委托为默认配置，然后应用自定义装饰。这样做可以保留LAF特定的视觉效果。

public static class HeaderRenderer implements UIResource, TableCellRenderer {

    private TableCellRenderer original;
    public HeaderRenderer(TableCellRenderer original) {
        this.original = original;
    }
    @Override
    public Component getTableCellRendererComponent(JTable table,
            Object value, boolean isSelected, boolean hasFocus, int row,
            int column) {
        Component comp = original.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
        comp.setFont(comp.getFont().deriveFont(Font.BOLD));
        return comp;
    }

}

要使用，请使用包装渲染器替换标头的默认值，并更新LAF的更改：

// replace the inital default with our wrapper
TableCellRenderer original = table.getTableHeader().getDefaultRenderer();
table.getTableHeader().setDefaultRenderer(new HeaderRenderer(original));
// a propertyChangeListener that updates the wrapper
PropertyChangeListener pl = new PropertyChangeListener() {

    @Override
    public void propertyChange(PropertyChangeEvent evt) {
        // cleanup (to be on the safe side)
        if (table.getTableHeader().getDefaultRenderer() instanceof HeaderRenderer) {
            HeaderRenderer renderer = (HeaderRenderer) table.getTableHeader().getDefaultRenderer();
            table.getTableHeader().setDefaultRenderer(renderer.original);
        }
        // invoke to make sure the ui delegate updated the header renderer
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                TableCellRenderer r = table.getTableHeader().getDefaultRenderer();
                if (!(r instanceof HeaderRenderer)) {
                    table.getTableHeader().setDefaultRenderer(new HeaderRenderer(r));
                    table.getTableHeader().repaint();
                }
            }
        });
    }
};
// register the listener with the UIManager to get notified on LAF changes
UIManager.addPropertyChangeListener(pl);

如何使defaulttablemodel表头加粗

2 个答案: