JAVA：将图像放入 jTable 单元格中

JAVA: Put Image in jTable Cell

提问by RYN

I need to display an image in one of jTable cells.
I wrote this:

我需要在 jTable 单元格之一中显示图像。
我是这样写的：

class ImageRenderer extends DefaultTableCellRenderer {
    JLabel lbl = new JLabel();

    public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected,
        boolean hasFocus, int row, int column) {
        lbl.setText((String) value);
        lbl.setIcon(new ImageIcon("/home/ariyan/Desktop/71290452.jpg"));
        return lbl;
    }
}

and then used it as this:

然后将其用作：

    jTable1.getColumn(0).setCellRenderer(new ImageRenderer());

But this didn't work
How I can do that?

但这不起作用
我怎么能做到这一点？

Thanks

谢谢

回答by camickr

JTable already provides a default renderer for images. You just need to tell the table what type of data is contained in each column and it will choose the best renderer:

JTable 已经为图像提供了默认渲染器。你只需要告诉表格每列包含什么类型的数据，它就会选择最好的渲染器：

a) override the getColumnClass() method of the JTable or the TableModel to return the class of data in the column. In this case you should return an Icon.class.

a) 覆盖 JTable 或 TableModel 的 getColumnClass() 方法以返回列中数据的类。在这种情况下，您应该返回一个 Icon.class。

b) add an ImageIcon to the table model.

b) 将 ImageIcon 添加到表模型。

Now the JTable will use the default Icon renderer for that column.

现在 JTable 将使用该列的默认图标渲染器。

回答by user268396

Hmm: jTable1.getColumnModel().getColumn(0).setCellRenderer(new ImageRenderer());perhaps?

嗯：jTable1.getColumnModel().getColumn(0).setCellRenderer(new ImageRenderer());也许？

Here's the relevant extract of some quick test code I put together to quickly verify my guess. It displays icons from a folder (it assumes all files in a folder are icons, so you should test it with something like an XDG icon theme sub directory). Install table model first then add the cell renderer on the columns:

这是我整理的一些快速测试代码的相关摘录，以快速验证我的猜测。它显示文件夹中的图标（它假定文件夹中的所有文件都是图标，因此您应该使用类似 XDG 图标主题子目录的内容对其进行测试）。首先安装表格模型，然后在列上添加单元格渲染器：

class Renderer extends DefaultTableCellRenderer {

    @Override
    public Component getTableCellRendererComponent (JTable table,
                                                    Object value,
                                                    boolean isSelected,
                                                    boolean hasFocus,
                                                    int row, int column) {
        if(isSelected) {
            this.setBackground(table.getSelectionBackground());
            this.setForeground(table.getSelectionForeground());
        }
        else {
            this.setBackground(table.getBackground());
            this.setForeground(table.getForeground());
        }
        if(column == 0) {
            this.setText(list[row]);
        }
        else {
            // edit as appropriate for your icon theme
            this.setIcon(new ImageIcon("/usr/share/icons/default.kde4/16x16/apps/"+list[row]));
        }
        return this;
    }

}
class Model extends DefaultTableModel {

    @Override
    public boolean isCellEditable (int row, int column) {
        return false;
    }

    @Override
    public Object getValueAt (int row, int column) {
        return list[row];
    }

    @Override
    public int getRowCount () {
        return list.length;
    }

    @Override
    public int getColumnCount () {
        return 2;
    }

    @Override
    public String getColumnName (int column) {
        return column == 0? "Name" : "Preview";
    }

    @Override
    public Class<?> getColumnClass (int columnIndex) {
        return String.class;
    }
}
// edit base directory as appropriate for your icon theme of choice
static String[] list=new File("/usr/share/icons/default.kde4/16x16/apps/").list();