Java JTable，通过鼠标单击在具体单元格中动态添加标签

我的任务是，将图像添加到具体列中，并在jTable中进行raw。我曾尝试使用setCellRendered，但它无法正常工作。也许有人也有同样的任务。 我曾尝试通过DefaultTableCellRenderer创建渲染器，但现在无法理解如何为具体单元格而不是列调用此渲染器，例如[3][4] 公共框架1（）{ 初始化（）； }

}

---

}不需要自定义渲染

您需要做的是：

将

图标

添加到

表格模型

覆盖

TableModel

的

getColumnClass（…）

方法以返回

Class.Icon

，表将使用默认的图标呈现器

如果您确实需要自定义渲染器，请查看上的Swing教程部分，以了解更多信息和工作示例

table.setBounds(0, 0, 350, 350);
table.setRowHeight(50);
frame.getContentPane().add(table);

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不要使用空布局！！！不要使用setBounds（）。Swing设计用于布局管理器。还需要将表添加到JScrollPane中，以便显示列标题。同样，教程中的示例将向您展示如何做到这一点。因此，请阅读教程并下载演示代码

修改了oracle.com上的示例。它显示选定单元格上的图标。请看：

/*
 * SimpleTableDemo.java requires no other files.
 */
import java.awt.Component;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.io.IOException;
import java.net.URL;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JLabel;
import javax.swing.table.DefaultTableCellRenderer;

public class SimpleTableDemo extends JPanel {

    private static final String ICON_IMAGE
            = "http://icons.iconarchive.com/icons/scafer31000/bubble-circle-3/16/GameCenter-icon.png";

    public SimpleTableDemo() {
        super(new GridLayout(1, 0));

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

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

        final JTable table = new JTable(data, columnNames);
        table.setPreferredScrollableViewportSize(new Dimension(500, 70));
        table.setFillsViewportHeight(true);
        java.awt.Image image = null;
        try {
            URL imageLoc = new URL(ICON_IMAGE);
            image = ImageIO.read(imageLoc);
        } catch (IOException ex) {
            Logger.getLogger(SimpleTableDemo.class.getName()).log(Level.SEVERE, null, ex);
        }
        final ImageIcon icon = new ImageIcon(image);
        table.setDefaultRenderer(Object.class, new ImageRenderer(icon));
        //Create the scroll pane and add the table to it.
        JScrollPane scrollPane = new JScrollPane(table);
        //Add the scroll pane to this panel.
        add(scrollPane);
    }

    /**
     * Create the GUI and show it. For thread safety, this method should be
     * invoked from the event-dispatching thread.
     */
    private static void createAndShowGUI() {
        //Create and set up the window.
        JFrame frame = new JFrame("SimpleTableDemo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        //Create and set up the content pane.
        SimpleTableDemo newContentPane = new SimpleTableDemo();
        newContentPane.setOpaque(true); //content panes must be opaque
        frame.setContentPane(newContentPane);

        //Display the window.
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        //Schedule a job for the event-dispatching thread:
        //creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }

    private class ImageRenderer extends DefaultTableCellRenderer {

        private final JLabel lbl = new JLabel();
        private final ImageIcon imageIcon;

        public ImageRenderer(ImageIcon imageIcon) {
            this.imageIcon = imageIcon;
            lbl.setIcon(imageIcon);
        }

        @Override
        public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected,
                boolean hasFocus, int row, int column) {
            Component result = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
            if (hasFocus && isSelected) {
                result = lbl;
            }
            return result;
        }
    }
}

---

正如我所理解的，当我们点击单元格时，这个单元格应该显示图像，但在您选择另一个单元格后，它是否需要显示图像？是的，我必须播放一个简单的“连接四”。如果我在列中单击，球必须落下直到第一个自由单元。现在我试着了解如何使用表和事件。感谢您的帮助advices@Lena，很高兴这有帮助。不要忘记单击复选标记“接受”答案，这样人们就知道问题已经解决。不需要自定义渲染器。@Lena不客气！如果这是你想要的，你可以投票表决，如果是错误的，我会尝试改变it@camickr也许你是对的，你能举一些例子吗？@Lena，这不是如何使用渲染器。数据应存储在TableModel中。然后使用渲染器在JTable中显示TableModel中的数据。这段代码完全绕过了TableModel。这不是一个如何将渲染器与JTable一起使用的示例。@camickr您能解释一下TableModel与TableModel的关系吗？特别是在MVC模式的范围内？您是否建议将数据层与表示层混合使用？如果你添加了一些“正确”用法的例子，那就太完美了

table.setBounds(0, 0, 350, 350);
table.setRowHeight(50);
frame.getContentPane().add(table);

/*
 * SimpleTableDemo.java requires no other files.
 */
import java.awt.Component;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.io.IOException;
import java.net.URL;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JLabel;
import javax.swing.table.DefaultTableCellRenderer;

public class SimpleTableDemo extends JPanel {

    private static final String ICON_IMAGE
            = "http://icons.iconarchive.com/icons/scafer31000/bubble-circle-3/16/GameCenter-icon.png";

    public SimpleTableDemo() {
        super(new GridLayout(1, 0));

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

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

        final JTable table = new JTable(data, columnNames);
        table.setPreferredScrollableViewportSize(new Dimension(500, 70));
        table.setFillsViewportHeight(true);
        java.awt.Image image = null;
        try {
            URL imageLoc = new URL(ICON_IMAGE);
            image = ImageIO.read(imageLoc);
        } catch (IOException ex) {
            Logger.getLogger(SimpleTableDemo.class.getName()).log(Level.SEVERE, null, ex);
        }
        final ImageIcon icon = new ImageIcon(image);
        table.setDefaultRenderer(Object.class, new ImageRenderer(icon));
        //Create the scroll pane and add the table to it.
        JScrollPane scrollPane = new JScrollPane(table);
        //Add the scroll pane to this panel.
        add(scrollPane);
    }

    /**
     * Create the GUI and show it. For thread safety, this method should be
     * invoked from the event-dispatching thread.
     */
    private static void createAndShowGUI() {
        //Create and set up the window.
        JFrame frame = new JFrame("SimpleTableDemo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        //Create and set up the content pane.
        SimpleTableDemo newContentPane = new SimpleTableDemo();
        newContentPane.setOpaque(true); //content panes must be opaque
        frame.setContentPane(newContentPane);

        //Display the window.
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        //Schedule a job for the event-dispatching thread:
        //creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }

    private class ImageRenderer extends DefaultTableCellRenderer {

        private final JLabel lbl = new JLabel();
        private final ImageIcon imageIcon;

        public ImageRenderer(ImageIcon imageIcon) {
            this.imageIcon = imageIcon;
            lbl.setIcon(imageIcon);
        }

        @Override
        public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected,
                boolean hasFocus, int row, int column) {
            Component result = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
            if (hasFocus && isSelected) {
                result = lbl;
            }
            return result;
        }
    }
}