$//$ SELF$-$CHECK PROBLEMS:

$//$ Note: you may need to put some of your answers inside comments

$//21.$ Consider the following variable declarations:

$//$ Integer n$1=15$;

$//$ Integer n$2=7$;

$//$ Integer n$3=15$;

$//$ String s$1=$ "computer";

$//$ String s$2=$ "soda";

$//$ String s$3=$ "pencil";

$//$ Indicate whether the result of each of the following comparisons is positive,

$//$ negative, or $0$:

$//$ A:

$//$ n$1.$compareTo$($n$2)$

$//$ B:

$//$ n$3.$compareTo$($n$1)$

$//$ C:

$//$ n$2.$compareTo$($n$1)$

$//$ D:

$//$ s$1.$compareTo$($s$2)$

$//$ E:

$//$ s$3.$compareTo$($s$1)$

$//$ F:

$//$ s$2.$compareTo$($s$2)$

$//22.$Use the compareTo method to write code that reads two names from the

$//$ console and prints the one that comes first in alphabetical order. For

$//$ example, the program$$s output might look like the following:

$//$ Type a name: Tyler Durden

$//$ Type a name: Marla Singer

$//$ Marla Singer goes before Tyler Durden

$//23.$Write code to read a line of input from the user and print the words of

$//$ that line in sorted order, without removing duplicates. For example, the

$//$ program output might look like the following:

$//$ Type a message to sort: $$to be or not to be that is the question

$//$ Your message sorted: be be is not or question that the to to

$//$ EXERCISES:

$//$ None

$\}$

$\}$