Chapter 6, Problem 13.1E

(Displaying a Square of Any Character) Modify the method created in Exercise 6.18 to receive a second parameter of type char called fillCharacter. Form the square using the char provided as an argument. Thus, if side is 5 and fillCharacter is #, the method should display

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Use the following statement (in which input is a Scanner object) to read a character from the user at the keyboard:

// next() returns a String and charAt(0) gets t char fill = input.next().charAt(0);