Java exercise

a) Write a method called makeLine that takes one integer and two char parameters (element and separator) and returns a String. The method should return a String representing a single line that is formed from the two characters given as parameters. Your method should construct this line by using the element character alternating with the separator character. The integer parameter gives the number of element characters there should be in the String, and these should each be separated by one separator character. Additionally, there should be one separator character at the start and end of the line, and the whole String should have an end-line character at the end.

For example, if your method were called with integer parameter 3 and char parameters A and b respectively, then the returned String would look like this: bAbAbAb

b) Write a method called makeGrid that takes one integer as a parameter and returns a String. The method should return a String representing a grid of squares, made up of (hyphen), | (vertical line), and space characters. Your method should use the result of part (a) to generate a square grid using the integer parameter as the size. The grid should look like an array of squares, like on a checkerboard. For example, if called with the parameter 3, then the returned String would look like this: - - -

| | | |

- - -

| | | |

- - -

| | | |

- - -

c) Write a main method prints to output a prompt for the user that asks for a single integer value, then use either the Scanner class or showInputDialog method to accept a single integer value as input. Use the method from part (b) to print to output a square grid of the appropriate size.