Typo corrections and hints for M16 exam e02

On handout “A”, p. 1, (blue sheet): The descriptions of compare and compareTo are reversed from what they should be. That is:

• The description given for compare is actually the description for compareTo
• The description given for compareTo is actually the description for compare

In Question 4: The whole method, not just the function prototype.

In questions 7,8,9: Where you see Comparator<ArrayList>, CROSS IT OUT. Write Comparator<Student> instead.

In question 7: My intention was to NOT allow Lambda functions for this particular problem. But, since I didn’t clearly signal my intent, I will accept a correct answer based on lambda functions.

Question 9: Minor typo: there are three things in the list of things to notice, not two.

Also, instead of java.lang.Math.signum, you may also use either of these methods of class java.lang.Double

• static int compare(double d1, double d2): Compares the two specified double values.
• int compareTo(Double anotherDouble) : Compares two Double objects numerically.

Those work in the usual way for a compare and compareTo method.