Java Reference
In-Depth Information
2. Write a method that takes as input a
StringBuffer
and reverses it. For example, if
the input string is
abc
, then the method will change the string to
cba
. The method
should have
void
return type.
3. Write a method that takes in an
ArrayList
of
Integer
and an integer and returns
true if the integer is in the
ArrayList
and false otherwise.
4. Write a program that prints five random playing cards, where all cards must be
different. Example output is: “queen of spades”, “ten of clubs”, “three of diamonds”,
“five of hearts”, “seven of spades”. Use the
enum
construct for both the value and suit
of the card. The value of a card can be: “two”, “three”, “four”, “five”, “six”, “seven”,
“eight”, “nine”, “ten”, “Jack”, “Queen”, “King”, or “Ace”. The suit of a card can be
“spades”, “hearts”, “diamonds”, or “clubs”. Store the cards in an
ArrayList
.Before
inserting a new card in the
ArrayList
, ensure that the card is not already in the list.
5. Write a method that takes as input an
ArrayList
of integers. The methods should
reverse the elements and have
void
return type.
6. Write a method that takes as input an
ArrayList
of integers. The methods should
return an
ArrayList
of integers that contains the three consecutive integers in the
input
ArrayList
with the biggest sum.
7. Write a method that takes as input an
ArrayList
of doubles. The method should
return an
ArrayList
of the doubles that are at even positions (i.e., position 0, 2, 4,
and so on).
8. Write a method that takes as input two
ArrayList
s of integers. The method should
return
true
when the
ArrayList
s have at least one element in common and
false
otherwise.
7.10 Lab
Create a phone book program. Add capabilities for inserting a new name and phone
number, deleting a person from the directory, searching for the phone number of a person,
and reverse lookup (i.e., searching for a name by phone number). Create a
Person
class and
an
ArrayList
of people as part of the implementation.
7.11 Project
Pig Latin is a twist of English for people who want to be silly, or for kids who do not
want their parents to know what they are talking about. There are different ways in which
people speak pig Latin. For this project, we are going to use the following dialect. For words
that begin with a single consonant, take the consonant off the front of the word and add it
to the end of the word. Then add “ay” after the consonant. Here are some examples.
