Review Exercises

Solutions Manual: Chapter 13 Big Java, by Cay Horstmann 1. Review Exercises.
NOTE: Only exercises 1 - 4 deal with ArrayLists. The others, which deal with
arrays, have been omitted, with the exception of exercise 5. The answers
provided below for exercise 5 show how to fill an ArrayList (not an array) with the
values ...

Part of the document


Review Exercises


NOTE: Only exercises 1 - 4 deal with ArrayLists. The others, which
deal with arrays, have been omitted, with the exception of exercise
5. The answers provided below for exercise 5 show how to fill an
ArrayList (not an array) with the values specified in the problem.

R13.1
An index is an integer value which represents a position in an array list.
The bounds of an array list is from 0 to 1 less than the size of the array
list.
A bounds error occurs when either the minimum or maximum index value is
exceeded in an attempted access of an array list element. Anything less
than 0 or greater than or equal to the array list size will produce a
bounds error.

R13.2
import java.util.ArrayList;


public class ExR13_2
{
public static void main(String[] args)
{
ArrayList a = new ArrayList();
a.add("a");
a.add("b");
String c = (String)a.get(2);
}
}
When you run this program, you get an array index out of bounds exception.

Exception in thread "main" java.lang.IndexOutOfBoundsException: Index: 2,
Size: 2
at java.util.ArrayList....
at ...
at ExR13_2.main(ExR13_2.java:10)
The line number (:10 in the example) helps you locate the error.

R13.3
import java.util.ArrayList;


public class ExR13_3
{
public static void main(String[] args)
{
ArrayList coins = new ArrayList();
coins.add(new Coin(0.10, "dime"));
coins.add(new Coin(0.25, "quarter"));
coins.add(new Coin(0.01, "penny"));
coins.add(new Coin(0.05, "nickel"));

Coin max = (Coin)coins.get(0);
Coin min = (Coin)coins.get(0);
for (int i = 1; i < coins.size(); i++)
{
Coin c = (Coin)coins.get(i);
if (c.getValue() max.getValue())
max = c;

if (c.getValue()

R13.4
import java.util.ArrayList;
import java.util.StringTokenizer;


public class ExR13_4
{
public static void main(String[] args)
{
ArrayList stringList = new ArrayList();

String input = "The department store has many " +
"items you can choose from";

StringTokenizer t = new StringTokenizer(input);

while (t.hasMoreTokens())
stringList.add(t.nextToken());

for (int i = stringList.size() - 1; i = 0; i--)
System.out.println(stringList.get(i));
}
}

R13.5

ArrayList a = new ArrayList() ;


1 2 3 4 5 6 7 8 9 10


for ( int i = 1 ; i