Problem 1
State whether each of the following is true or false. If false, explain why. a) A generic method cannot have the same method name as a non-generic method. b) All generic method declarations have a type parameter section that immediately precedes the method name. c) A generic method can be overloaded by another generic method with the same method name but different method parameters. d) A type parameter can be declared only once in the type parameter section but can appear more than once in the method's parameter list. e) Type parameter names among different generic methods must be unique. f) The scope of a generic class's type parameter is the entire class except its static members.
Problem 2
Fill in the blanks in each of the following: a) \(\quad\) and \(\quad\) enable you to specify, with a single method declaration, a set of related methods, or with a single class declaration, a set of related types, respectively. b) A type parameter section is delimited by c) A generic method's can be used to specify the method's argument types, to specify the method's return type and to declare variables within the method. d) The statement "Stack objectstack \(=\) new \(\operatorname{Stack}() ;\) " indicates that objectstack stores e) In a generic class declaration, the class name is followed by a(n) The syntax
Problem 8
Write a generic class Pair which has two type parameters \(-F\) and \(S,\) each representing the type of the first and second element of the pair, respectively. Add get and set methods for the first and second elements of the pair. [Hint: The class header should be public class Pair \( < \mathrm{F}, \mathrm{S} > .\)
Problem 9
Convert classes TreeNode and Tree trom Fig. 17.17 into generic classes. Io insert an object in a Tree, the object must be compared to the objects in existing TreeNodes. For this reason, classes TreeNode and Tree should specify Comparable \(<\mathrm{E}>\) as the upper bound of each class's type parameter. After modifying classes TreeNode and Tree, write a test application that creates three Tree objects - one that stores Integers, one that stores Doubles and one that stores Strings. Insert 10 values into each tree. Then output the preorder, inorder and postorder traversals for each Tree.
Problem 12
The compiler performs a matching process to determine which method to call when a method is invoked. Under what circumstances does an attempt to make a match result in a compiletime error?
Problem 13
Explain why a Java program might use the statement ArrayList < Employee \( > \) workerList \(=\) new ArrayList \( < \) Employee \( > ()\)
