e902. getting the large file-type icon of a file.txt

这里面包含了一百多个JAVA源文件

This example uses an unsupported class - - sun.awt.shell.ShellFolder - - and therefore will not work in all virtual machines. 
    // Create a File instance of the file
    File file = new File("filename.txt");
    
    try {
        sun.awt.shell.ShellFolder sf = sun.awt.shell.ShellFolder.getShellFolder(file);
    
        // Get large icon
        Icon icon = new ImageIcon(sf.getIcon(true), sf.getFolderType());
    } catch (FileNotFoundException e) {
    }