用于打开 JDialog 的 JTable 侦听器

Question

抱歉，如果有类似的问题，找不到任何东西。

基本上，在我的程序中，我在 JTable 中的每一行都有它们的质量、描述、价格等项目。每当从表中选择该项目时，我都想打开一个新的 JDialog，其中包含有关该项目的更多信息。但是，我不知道如何获取所选行，例如更改其颜色以知道它已被选中。以下我尝试了，它没有做任何事情。我猜事件的来源与模型无关。

public void addListener(){

    table.getSelectionModel().addListSelectionListener(new ListSelectionListener(){

        @Override
        public void valueChanged(ListSelectionEvent e) {
            if (e.getSource() == table.getSelectionModel()) {
                ItemDialog id = new ItemDialog(table.getSelectedRow());
            }

        }

    });
}

Answer 1

可以通过在表格的选择模型中添加列表选择监听器来获取选中的行：

import java.awt.Dimension;
import java.awt.GridLayout;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
import javax.swing.WindowConstants;

/**
 * Adapted version of a standard Java demo project:
 * https://docs.oracle.com/javase/tutorial/displayCode.html?
 *     code=https://docs.oracle.com/javase/tutorial/uiswing/examples
 *     /components/SimpleTableDemoProject/src/components
 *     /SimpleTableDemo.java
 */
public class SimpleTableDemo extends JPanel {
    public SimpleTableDemo() {
        super(new GridLayout(1, 0));

        String[] columnNames = {"First Name", "Last Name", "Sport",
                "# of Years", "Vegetarian"};

        Object[][] data = {
                {"Kathy", "Smith", "Snowboarding", 5, false},
                {"John", "Doe", "Rowing", 3, true},
                {"Sue", "Black", "Knitting", 2, false},
                {"Jane", "White", "Speed reading", 20, true},
                {"Joe", "Brown", "Pool", 10, false}
        };

        final JTable table = new JTable(data, columnNames);
        table.setPreferredScrollableViewportSize(new Dimension(500, 70));
        table.setFillsViewportHeight(true);
        table.getSelectionModel().addListSelectionListener(
            selectionEvent -> {
                if (!selectionEvent.getValueIsAdjusting()
                    && selectionEvent.getSource().equals(table.getSelectionModel()))
                    System.out.println("Row index: " + table.getSelectedRow());
            }
        );
        add(new JScrollPane(table));
    }

    private static void createAndShowGUI() {
        JFrame frame = new JFrame("SimpleTableDemo");
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        SimpleTableDemo newContentPane = new SimpleTableDemo();
        newContentPane.setOpaque(true);
        frame.setContentPane(newContentPane);
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(SimpleTableDemo::createAndShowGUI);
    }
}

Answer 2

以下是我的一个旧项目中的几行代码。 （我故意不提供完整代码，因为其中很多都是不敬的）

将 MouseListener 添加到表中

table.addMouseListener(new MouseListener() {
            public void mouseReleased(MouseEvent arg0) {
            }

            public void mousePressed(MouseEvent arg0) {
            }

            public void mouseExited(MouseEvent arg0) {
            }

            public void mouseEntered(MouseEvent arg0) {
            }

            public void mouseClicked(MouseEvent e) {
                if (SwingUtilities.isRightMouseButton(e)) { // change it to whatever key or click you want
                    if (table.getRowCount() != 0) {
                        printSelectedRowData();
                    }
                }
            }
        });

这里是 printSelectedRowData() 方法

public void printSelectedRowData() {
    new SwingWorker<Void, Void>() {
        @Override
        protected Void doInBackground() throws Exception {
            try {
                Object[] rowData = new Object[table.getColumnCount()];
                for (int i = 0; i < table.getColumnCount(); i++) {
                    rowData[i] = table
                            .getValueAt(table.getSelectedRow(), i);
                    System.out.println(table.getColumnName(i) + ":  "
                            + rowData[i] + "\n");
                }
            } catch (Exception e) {
                System.err.println("Error  ");
            }
            return null;
        }
    }.execute();
}