如何在JTable中选择行或列？

Posted 2021-04-11

默认情况下，在JTable中，如果选择单元格，则会选择该单元格的整行。我想保留这个功能。

但是，标题中的按钮（每列上方）默认情况下不执行任何操作。我希望能够单击其中一个并突出显示整个列（我不想通过执行此操作来摆脱选择整行的能力）

我该怎么做呢？

答案

在https://kodejava.org/how-do-i-allow-row-or-column-selection-in-jtable/找到另一个例子：

“为了允许行选择或列选择或JTable组件中的行和列选择，我们可以通过调用JTable的setRowSelectionAllowed（）和JTable的setColumnSelectionAllowed（）方法来打开和关闭它。

这两种方法都接受一个布尔值，指示是允许还是不允许选择。将它们都设置为true允许我们从JTable中选择行和列。“

package org.kodejava.example.swing;

import javax.swing.*;
import javax.swing.table.AbstractTableModel;
import java.awt.*;

public class TableAllowColumnSelection extends JPanel {
public TableAllowColumnSelection() {
    initializePanel();
}

private void initializePanel() {
    this.setLayout(new BorderLayout());
    this.setPreferredSize(new Dimension(500, 150));

    JTable table = new JTable(new PremiereLeagueTableModel());
    // sets to false to disallow row selection in the table
    // model.
    table.setRowSelectionAllowed(false);

    // Sets to true to allow column selection in the table
    // model.
    table.setColumnSelectionAllowed(true);

    JScrollPane pane = new JScrollPane(table);
    this.add(pane, BorderLayout.CENTER);
}

public static void showFrame() {
    JPanel panel = new TableAllowColumnSelection();
    panel.setOpaque(true);

    JFrame frame = new JFrame("JTable Column Selection");
    frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    frame.setContentPane(panel);
    frame.pack();
    frame.setVisible(true);
}

public static void main(String[] args) {
    SwingUtilities.invokeLater(new Runnable() {
        public void run() {
            TableAllowColumnSelection.showFrame();
        }
    });
}

class PremiereLeagueTableModel extends AbstractTableModel {
    // TableModel's column names
    private String[] columnNames = {
        "TEAM", "P", "W", "D", "L", "GS", "GA", "GD", "PTS"
    };

    // TableModel's data
    private Object[][] data = {
        { "Liverpool", 3, 3, 0, 0, 7, 0, 7, 9 },
        { "Tottenham", 3, 3, 0, 0, 8, 2, 6, 9 },
        { "Chelsea", 3, 3, 0, 0, 8, 3, 5, 9 },
        { "Watford", 3, 3, 0, 0, 7, 2, 5, 9 },
        { "Manchester City", 3, 2, 1, 0, 9, 2, 7, 7 }
    };

    public int getRowCount() {
        return data.length;
    }

    public int getColumnCount() {
        return columnNames.length;
    }

    public Object getValueAt(int rowIndex, int columnIndex) {
        return data[rowIndex][columnIndex];
    }
 }
}