Question

怎么在JTable表格中加入如JComboBox之类的控件？有注释加分。

怎么在JTable生成的表格单元格中加入 如JComboBox的下拉列表框，JCheckBox复选框，JRadioButton单选框 这些组件？

我搜索了一下网上，提到什么TableCellRenderer，TableModel，TableCellEditor这些我没学过的类。 没有例子我也不知道怎么用。

哪位朋友给各最简单的代码例子吧，加上注释最好，有加分。谢谢。

Answer 1

你去看看官方文档吧 :

http://java.sun.com/docs/books/tutorial/uiswing/components/table.html

下面是另一个例子：

JTable table = new JTable();
DefaultTableModel model = (DefaultTableModel)table.getModel();

// Add some columns
model.addColumn("A", new Object[]{"item1"});
model.addColumn("B", new Object[]{"item2"});

// These are the combobox values
String[] values = new String[]{"item1", "item2", "item3"};

// Set the combobox editor on the 1st visible column
int vColIndex = 0;
TableColumn col = table.getColumnModel().getColumn(vColIndex);
col.setCellEditor(new MyComboBoxEditor(values));

// If the cell should appear like a combobox in its
// non-editing state, also set the combobox renderer
col.setCellRenderer(new MyComboBoxRenderer(values));

public class MyComboBoxRenderer extends JComboBox implements TableCellRenderer {
public MyComboBoxRenderer(String[] items) {
super(items);
}

public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {
if (isSelected) {
setForeground(table.getSelectionForeground());
super.setBackground(table.getSelectionBackground());
} else {
setForeground(table.getForeground());
setBackground(table.getBackground());
}

// Select the current value
setSelectedItem(value);
return this;
}
}

public class MyComboBoxEditor extends DefaultCellEditor {
public MyComboBoxEditor(String[] items) {
super(new JComboBox(items));
}
}