Construct a UML class diagram for files in a computer directory. The class name should be...

Construct a UML class diagram for files in a computer directory. The class name should be

File

. Include the following methods: 

public String getName(), public long length()

,and

public boolean isHidden().

 Also, include the instance variable associated with the first of these methods. Include an indication of whether the member is 

public

 or private and the type of the return value or variable. A 

File

 class already exists as part of the Java language, and this class also has many other methods, but the API library documentation for this class does not show any instance variables. Does that mean this class has no instance variables?