CODEWITHSUNDEEP
javaswingjfilechooser
JavaTechnical
JavaTechnical

Reputation: 9357

How to display custom icons for files in JFileChooser?

How to display custom icons for files in JFileChooser? Well i neither want the default system icon for the files nor the default icon that comes with JFileChooser. I want my own icon.

I want to set the icon for a file by it's extension. How could i do that?

Upvotes: 1

Views: 810

Answers (1)

JavaTechnical
JavaTechnical

Reputation: 9357

We can make use of the Hashtable which contains the extension as String type and an ImageIcon

Hashtable is in java.util package

FileView is in javax.swing.filechooser package

// Create a hashtable for String,ImageIcon
Hashtable<String,ImageIcon> table=new Hashtable<>();

    // Add extensions and icons
    table.put(".txt",new ImageIcon("txtfile.png"));
    table.put(".doc",new ImageIcon("docfile.png"));
    table.put(".ppt",new ImageIcon("pptfile.png"));
    table.put(".lnk",new ImageIcon("link.png"));
    table.put(".png",new ImageIcon("image.png"));
    table.put(".gif",new ImageIcon("image.png"));
    table.put(".jpeg",new ImageIcon("image.png"));
    table.put(".jpg",new ImageIcon("image.png"));

In the class MyFileView

class MyFileView extends FileView
{
Hashtable<String,ImageIcon> table;
ImageIcon dirIcon;

    public MyFileView(Hashtable<String,ImageIcon> table,ImageIcon dirIcon)
    {
        this.table=table;
        this.dirIcon=dirIcon;
    }

    public Icon getIcon(File f)
    {
    // Do display custom icons

        // If dir
        if(f.isDirectory()) 
        {
            if(dirIcon!=null) return dirIcon;
        return new ImageIcon("myfoldericon.png");
        }

        // Get the name
        String name=f.getName();
        int idx=name.lastIndexOf(".");

        if(idx>-1)
        {
        String ext=name.substring(idx);
            if(table.containsKey(ext))
        return table.get(ext);
        }

    // For other files
    return new ImageIcon("myownfileicon.png");
    }
}

And the code to use this,

MyFileView m=new MyFileView(table,new ImageIcon("diricon.png"));
JFileChooser jf=new JFileChooser();
jf.setFileView(m);
jf.showOpenDialog(this);

If we don't want by extension or if we want to set a custom icon for hard drive, my computer then we can make use of the UI defaults.

Upvotes: 2

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