Assume the existence of a Window class with the following methods: - widen - accepts no arguments; doubles the width of the window - setHeight - accepts an integer argument corresponding to the new height of the Window - getWidth and getHeight - accept no arguments, return the width and height of the window respectively. There is also a subclass, TitledWindow whose constructor accepts a width and height (bot integers), and a title (a string) -- in that order. TitledWindow also has a method, setText that accepts a string, allowing the title of the window to be changed. Declare a variable, tWindow, of type TitledWindow variable, and initialize it to a window with a width of 50 and a height of 75, and a title of "Rectangular Window". Double the width of the window, using widen, set the height of the window so that it is the same as the width, and set the title to the new value "Square Window".

This question involves a class named textfile that represents a text file. public class textfile { private string filename; private string filename; private arraylist words; // constructors not shown // postcondition: returns the number of bytes in this file public int filesize() { } // precondition: 0 < = index < words.size() // postcondition: removes numwords words from the words arraylist beginning at // index. public void deletewords(int index, int numwords) { } // precondition: 0 < = index < = words.size() // postcondition: adds elements from newwords array to words arraylist beginning // at index. pub lic voidaddwords(int index, string[] newwords) { } // other methods not shown } complete the filesize() method. the filesize() is computed in bytes. in a text file, each character in each word counts as one byte. in addition, there is a space in between each word in the words arraylist, and each of those spaces also counts as one byte. for example, suppose the words arraylist stores the following words: { mary had a little lamb; its fleece was white as snow. } the filesize() method would compute 4 + 3 + 1 + 6 + 5 + 4 + 6 + 3 + 5 + 2 + 5 as the sum of the lengths of each string in the arraylist. the value returned would be this sum plus 10, because there would also be 10 spaces in between the 11 words. complete the filesize() method below: // postcondition: returns the number of bytes in this file public int filesize() { }