如何使defaulttablemodel表标题加粗
[英]How to make the defaulttablemodel table header bold
问题描述
I want to make the header of a jtable with defaulttablemodel BOLD. 
我想使用defaulttablemodel BOLD使jtable的标头。 Here's my code 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;
};
};
I want to make the column headers BOLD. 我想使列标题为粗体。 any hint on this is appreciated 任何暗示对此表示赞赏
2 个解决方案
解决方案1
3 已采纳 2013-10-04 07:55:56
Strangely enough, a table column header uses the same concept to renderer as the table does... 奇怪的是，表列标题使用与表相同的概念进行渲染...
DefaultTableCellRenderer header = new DefaultTableCellRenderer();
header.setFont(header.getFont().deriveFont(Font.BOLD));
JTable table = new JTable();
TableColumnModel model = table.getColumnModel();
model.getColumn(0).setHeaderRenderer(header);
For example. 例如。 But I don't think it will turn out the way you want it to... 但是我不认为这会变成您想要的方式...
Instead, you could try something like... 相反，您可以尝试类似...
DefaultTableModel model = new DefaultTableModel(new Object[]{"<html><b>Happy</b></html>", "Sad"}, 0);
JTable table = new JTable(model);
解决方案2
3 2013-10-11 13:01:57
A cleaner (than @Mad's) strategy for custom visual in a renderer is to implement a wrapping renderer around the default: it delegates all configuration to the default and than applies custom decorations. 渲染器中用于自定义视觉的一种更清洁（比@Mad的策略）的策略是实现围绕默认值的包装渲染器：它将所有配置委派为默认值，然后应用自定义装饰。 Doing so keeps the LAF specific visuals. 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;
}
}
To use, replace the header's default with the wrapping renderer and update on changes of LAF: 若要使用，请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);
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