无法使用ImageIcon向jTable单元添加图像

问题描述

我试图使用ImageIcon类将图像添加到jTable单元格中，但是我进入了sun.awt.image.ToolkitImage@196a4632单元格中应该在该单元格中显示图像的位置我尝试的代码:

     JTable jTable;
 String[] columns={"Page No","Chapter","Image"};
 Object[][] rows={{1,4,null},{2,7,null}}}
 public Tab_ImgIcn(){
 ImageIcon icon=new ImageIcon(getClass().getResource("exit.png"));
           jTable= new JTable(rows, columns);
           jTable.setValueAt(icon.getImage(), 0,3);
           JScrollPane jps = new JScrollPane(jTable);
           frame.add(jps);
}

解决方案

您需要在表模型上覆盖getColumnClass()，并为带有ImageIcon的列返回ImageIcon.class.否则，渲染器将显示toString()，因为默认的列类类型为Object.请参见如何使用表:编辑器和渲染器. /p>

例如

ImageIcon icon=new ImageIcon(getClass().getResource("exit.png"));
String[] columns={"Page No","Chapter","Image"};
Object[][] rows={{1,4,icon},{2,7,icon}};

DefaultTableModel model = new DefaultTableModel(rows, columns) {
    @Override
    public Class<?> getColumnClass(int column) {
        switch(column) {
            case 0:
            case 1: return Integer.class;
            case 2: return ImageIcon.class;
            default: return Object.class;
        }
    }
};
JTable table = new JTable(model);

I trying to add image using ImageIcon class to jTable cell , but i get in the cell sun.awt.image.ToolkitImage@196a4632 where it supposed to display image in the cellthe code i tried :

     JTable jTable;
 String[] columns={"Page No","Chapter","Image"};
 Object[][] rows={{1,4,null},{2,7,null}}}
 public Tab_ImgIcn(){
 ImageIcon icon=new ImageIcon(getClass().getResource("exit.png"));
           jTable= new JTable(rows, columns);
           jTable.setValueAt(icon.getImage(), 0,3);
           JScrollPane jps = new JScrollPane(jTable);
           frame.add(jps);
}

解决方案

You need to override getColumnClass() on the table model, and return ImageIcon.class for the column with the ImageIcon. If you don't, the renderer will show the toString(), as the default column class type will be Object. See How to use Tables: Editors and Renderers.

For example

ImageIcon icon=new ImageIcon(getClass().getResource("exit.png"));
String[] columns={"Page No","Chapter","Image"};
Object[][] rows={{1,4,icon},{2,7,icon}};

DefaultTableModel model = new DefaultTableModel(rows, columns) {
    @Override
    public Class<?> getColumnClass(int column) {
        switch(column) {
            case 0:
            case 1: return Integer.class;
            case 2: return ImageIcon.class;
            default: return Object.class;
        }
    }
};
JTable table = new JTable(model);

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