Question

新布尔值不应显示为复选框吗？它反而显示为真/假字符串值。这就是我填充数据的方式：

    Object[] columnNames4 = {"Name", "City", "Checkbox"};
    Object[][] data = {
    {"john smith",
     "x", new Boolean(false)},
    {"jenny m",
     "y", new Boolean(false)}
     };
    JTable table4 = new JTable(data, columnNames4);
    JScrollPane S3 = new JScrollPane(table4);
    S3.setPreferredSize(new Dimension(300, 300));

Answer 1

创建AbstractTableModel的子类，并在Method getColumnClass（）中返回所需列的Boolean.class。

Answer 2

您需要设置TableCellRenderer和TableCellEditor

请参阅http://docs.oracle.com/javase/tutorial/uiswing/components/table.html

一旦定义了渲染/编辑器，您就可以

将渲染/编辑器定义为Type的默认渲染 table.setDefaultRenderer(Boolean.class, new MyBooleanRender()); table.setDefaultEditor(Boolean.class, new MyBooleanCellEditor());
将渲染/编辑器定义为列 TableColumnModel tcm = table.getColumnModel(); tcm.getColumn(4).setCellRenderer(new MyBooleanRender()); tcm.getColumn(4).setCellEditor(new MyBooleanCellEditor());

您可以定义一个复选框cellRender，如：

public class MyBooleanRender extends JCheckBox
implements TableCellRenderer {

private JCheckBox checkBox = this;

/**
 * @see javax.swing.table.TableCellRenderer#getTableCellRendererComponent
 * (javax.swing.JTable, java.lang.Object, boolean, boolean, int, int)
 */
public Component getTableCellRendererComponent(
    JTable tbl,
    Object value,
    boolean isSelected,
    boolean hasFocus,
    int row,
    int column) {
    boolean val = false;

    if (Common.isEmpty(value)) {
        checkBox.setSelected(false);
    } else {

        try {
            val = ((Boolean) value).booleanValue();
        } catch (Exception e) {
        }
        checkBox.setSelected(val);
    }  

    if (Common.OPTIONS.highlightEmpty.isSelected() && value == Common.MISSING_VALUE) {
        checkBox.setBackground(Common.EMPTY_COLOR);
    } else if (value == Common.MISSING_REQUIRED_VALUE) {
        checkBox.setBackground(Common.MISSING_COLOR);
    } else {
        ...
    }

    checkBox.setSelected(val);
    return checkBox;
}
}

对于checkboxEditor，您可以使用DefaultCellEditor类。

为什么JTable中的布尔值显示为true / false而不是复选框？

2 个答案: