java - JTable 行颜色取决于模型中的值？

Question

我的表模型中有这段代码:

public class DocumentProjectTableModel extends AbstractTableModel{

    private List<MyDocument> myDocuments;
    public String getValueAt(int row, int column) {
            String toReturn = null;
            MyDocument myDocument = myDocuments.get(row);
            SimpleDateFormat format = new SimpleDateFormat("dd.MM.yyyy");

            switch (column) {
                case 0:
                    if(myDocument.getProject().getRegDate()!=null) toReturn = format.format(myDocument.getProject().getRegDate());
                    break;
                case 1:
                    toReturn = myDocument.getProject().getRegNum();
                    break;
                case 2:
                    toReturn = myDocument.getProject().getDescription();
                    break;
                case 3:
                    toReturn = myDocument.getProject().getShortName();
                    break;
                case 4:
                    toReturn = myDocument.getProject().getSecondName()+myDocument.getProject().getFirstName()+myDocument.getProject().getMiddleName();
                    break;

            }
            return toReturn;
        }
//  some other stuff is not shown

我想改变每一行的背景颜色，例如如果 myDocument.getIsRegistered() == true，我希望这一行有黄色背景，如果 myDocument.getIsValid == false 行为蓝色等。

我找到了根据 JTable 中的值对行重新着色的示例。但是 getIsValid 和 getIsRegistered() 实际上并没有显示，它们只存在于模型中。任何建议或例子都会有帮助。提前致谢。

更新。我的 TableCellRenderer:

public class MyTableCellRenderer extends JLabel implements TableCellRenderer {

    public Component getTableCellRendererComponent(JTable table, Object value,
            boolean isSelected, boolean hasFocus, int rowIndex, int vColIndex) {
        String actualValue = (String) value;
        // Set the colors as per the value in the cell...
        if(actualValue.equals("lifesucks") ){
            setBackground(Color.YELLOW);
        }
        return this;
    }
}

使用渲染器:

            int vColIndex = 0;
            TableColumn col = resultTable.getColumnModel().getColumn(vColIndex);
            col.setCellRenderer(new MyTableCellRenderer());
 resultTable.setModel(new DocumentProjectTableModel(docs));

表格照常显示，没有黄色。为什么？

更新2。

resultTable=new JTable(new DocumentProjectTableModel(docs)){
            public Component prepareRenderer(TableCellRenderer renderer, int row, int column)
            {
                Component c = super.prepareRenderer(renderer, row, column);
                //  Color row based on a cell value
                if (!isRowSelected(row)) {
                    c.setBackground(getBackground());
                    int modelRow = convertRowIndexToModel(row);
                    String type = (String) getModel().getValueAt(modelRow, 0);

                        c.setBackground(Color.GREEN);
                }
                return c;
            }
        };

表是空的:(

Answer 1

因为你想为整行着色，所以它更容易使用 Table Row Rendering而不是创建多个自定义渲染器。

I've found examples that recolor rows depending on values in JTable. But getIsValid and getIsRegistered() aren't actually displayed, they exist only in model

您仍然可以从表中访问模型。你只需使用:

table.getModel().getValueAt(...);