Exercise $2\mathrm{.}42.(??)$

What To Do:

For each of the following problems, create a class named ProblemX, where X is the problem

number. E$.$g$.,$ the class for problem $1$ should be Problem$1.$java. Write $($JUnit$)$ tests for each

$($non$-$private$)$ method that you design in corresponding test files named ProblemXTest, where

X is the problem number. For problems that contain multiple parts, put those in the same class file.

Additionally, write Javadoc comments explaining the purpose of the method, its parameters, and

return value. Do not round your solutions!Design the int compareTo$($String s$1,$ String s$2)$ method, which receives two strings

s$1,$ s$2,$ and compares their contents lexicographically. If s$1$ is less than s$2,$ return $-1.$ If s$1$

is greater than s$2,$ return $1.$ Otherwise, return $0.$ Note that our implementation of compareTo

will differ from Java$$s in that, if s$1$ has less characters than s$2,$ we return $-1$; if s$2$ has less

characters than s$1,$ we return $1.$ Otherwise, we do the character$-$by$-$character comparison.