Mutable, Immutable, and Cloneable Objects - Data Structures and Abstractions with Java - page 802

12.

The class NickName given in Segment C.3 of Appendix C has a data field that is an instance of the class Name
and two methods, setNickName and getNickName . Implement a method clone for NickName , assuming that Name
implements the interface Cloneable .

13.

Consider a class that implements ListInterface but does not make clones of objects added to the list. Suggest
two ways that we can make a list of clones.

14.

Consider a class that implements ListInterface and makes clones of objects added to the list. Suggest two ways
that we can make a list of the original objects.

15.

Consider the following class definition:
public class FamilyMember implements Cloneable
{

private Name myName;
private FamilyMember mySpouse;
public FamilyMember(Name aName)
{

myName = aName;
} // end constructor
public Name getName()
{

return myName;
} // end getName
public FamilyMember getSpouse()
{

return mySpouse;
} // end getSpouse
public void setSpouse(FamilyMember spouse)
{

mySpouse = spouse;
} // end setSpouse
public Object clone()
{

FamilyMember theCopy = null ;
try
{

theCopy = (FamilyMember) super .clone();

}
catch (CloneNotSupportedException e)
{

System.err.println("FamilyMember cannot clone:" + e.toString());

}
return theCopy;
} // end clone
} // end FamilyMember

Draw a diagram showing the state of the objects after the following code executes.
FamilyMember jack = new FamilyMember( new Name("Jack", "Buck"));
FamilyMember jane = new FamilyMember( new Name("Jane", "Doe"));
jack.setSpouse(jane);
jane.setSpouse(jack);
FamilyMember copy = (FamilyMember)jane.clone();

16.

Replace the method copy , as discussed in Segment 24.6 of Chapter 24, with a method clone . That is, make
BinaryNode implement the interface Cloneable . Cloning a node should also clone the node's data object.