Java JTable中的多行选择

• Z时代
• 2024-01-10
• 分类：问答

我有一个JTable，它的一列是不可编辑的文本，第二列是一个显示布尔值的复选框…。现在我要的是，当用户选择多行并取消选中其中的任何一个时选中的复选框，则选中的所有复选框都应取消选中，反之亦然。

回答：

使用@Hovercraft的示例和@camickr的建议，以下示例显示了合适的用户界面。尽管它使用按钮，但它SelectionAction也适用于菜单或弹出窗口。

import java.awt.*;
import java.awt.event.ActionEvent;
import javax.swing.*;
import javax.swing.DefaultListSelectionModel;
import javax.swing.table.DefaultTableModel;
/** @see http://stackoverflow.com/questions/4526779 */
public class CheckABunch extends JPanel {
    private static final int CHECK_COL = 1;
    private static final Object[][] DATA = {
        {"One", Boolean.TRUE}, {"Two", Boolean.FALSE},
        {"Three", Boolean.TRUE}, {"Four", Boolean.FALSE},
        {"Five", Boolean.TRUE}, {"Six", Boolean.FALSE},
        {"Seven", Boolean.TRUE}, {"Eight", Boolean.FALSE},
        {"Nine", Boolean.TRUE}, {"Ten", Boolean.FALSE}};
    private static final String[] COLUMNS = {"Number", "CheckBox"};
    private DataModel dataModel = new DataModel(DATA, COLUMNS);
    private JTable table = new JTable(dataModel);
    private DefaultListSelectionModel selectionModel;
    public CheckABunch() {
        super(new BorderLayout());
        this.add(new JScrollPane(table));
        this.add(new ControlPanel(), BorderLayout.SOUTH);
        table.setPreferredScrollableViewportSize(new Dimension(250, 175));
        selectionModel = (DefaultListSelectionModel) table.getSelectionModel();
    }
    private class DataModel extends DefaultTableModel {
        public DataModel(Object[][] data, Object[] columnNames) {
            super(data, columnNames);
        }
        @Override
        public Class<?> getColumnClass(int columnIndex) {
            if (columnIndex == CHECK_COL) {
                return getValueAt(0, CHECK_COL).getClass();
            }
            return super.getColumnClass(columnIndex);
        }
        @Override
        public boolean isCellEditable(int row, int column) {
            return column == CHECK_COL;
        }
    }
    private class ControlPanel extends JPanel {
        public ControlPanel() {
            this.add(new JLabel("Selection:"));
            this.add(new JButton(new SelectionAction("Clear", false)));
            this.add(new JButton(new SelectionAction("Check", true)));
        }
    }
    private class SelectionAction extends AbstractAction {
        boolean value;
        public SelectionAction(String name, boolean value) {
            super(name);
            this.value = value;
        }
        @Override
        public void actionPerformed(ActionEvent e) {
            for (int i = 0; i < dataModel.getRowCount(); i++) {
                if (selectionModel.isSelectedIndex(i)) {
                    dataModel.setValueAt(value, i, CHECK_COL);
                }
            }
        }
    }
    private static void createAndShowUI() {
        JFrame frame = new JFrame("CheckABunch");
        frame.add(new CheckABunch());
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }
    public static void main(String[] args) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                createAndShowUI();
            }
        });
    }
}

以上是 Java JTable中的多行选择 的全部内容， 来源链接： utcz.com/qa/427044.html