e893. getting the file-type name of a file.txt

这里面包含了一百多个JAVA源文件

Files and directories have a type, usually based on their extension. This example retrieves the name of the file type. Examples of file-type names include Java Source and Shortcut. This name is displayed with the filename in a file chooser dialog. 
    JFileChooser chooser = new JFileChooser();
    
    // Create a File instance of the file
    File file = new File("filename.txt");
    
    // Get the file type name
    String fileTypeName = chooser.getTypeDescription(file);
    // Text Document