4. Now examine the ArrayList methods in the above table, a) Which method retrieves elements from the ArrayList? b) Which method replaces the value of an element that already exists in the ArrayList? c) Which two methods initializes the value of an element? d) How do the two methods in (c) differ? Which method(s) would be appropriate in the above Java program (after we convert it to work with ArrayLists)?
4. Now examine the ArrayList methods in the above table, a) Which method retrieves elements from the ArrayList? b) Which method replaces the value of an element that already exists in the ArrayList? c) Which two methods initializes the value of an element? d) How do the two methods in (c) differ? Which method(s) would be appropriate in the above Java program (after we convert it to work with ArrayLists)?
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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4. Now examine the ArrayList methods in the above table,
a) Which method retrieves elements from the ArrayList?
b) Which method replaces the value of an element that already exists in the ArrayList?
c) Which two methods initializes the value of an element?
d) How do the two methods in (c) differ? Which method(s) would be appropriate in the above Java program (after we convert it to work with ArrayLists)?
![Here is a quick review of how array elements are modified and accessed:
public class BasicArray{
2.
public static void main(String[] args)
{
3.
int[] basic = new int[4];
4.
for (int i=0; i<basic.length; i++) {
basic[i] = i+1;
5.
6.
}
7.
for (int i=0;
i<basic.length; i++) {
8.
basic[i] = basic[i] *5;
9.
}
10.
for (int i=0; i<basic.length; i++) {
System.out.println(basic[i]);
11.
12.
}
13.
14. }
Because ArrayList is a Java class, we will need set and get methods to modify the ArrayList. The E
type refers to the base type of the ArrayList:
Return
Method
(Parameters)
Value
Description
Туре
add(E element)
boolean Appends the specified element to the end of this list.
add(int index, E
void
element)
get(int index)
E
set(int index, E
E
element)
size()
int
}
Inserts the specified element at the specified position in this list.
Returns the element at the specified position in this list.
Replaces the element at the specified position in this list with the
specified element. Returns the element previously at the specified
position.
Returns the number of elements in this list.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6cf78908-a1f9-4330-9ece-f4021df10613%2Fcd099ace-86c8-43b3-89ca-e958e52d867c%2Fka3nscr_processed.png&w=3840&q=75)
Transcribed Image Text:Here is a quick review of how array elements are modified and accessed:
public class BasicArray{
2.
public static void main(String[] args)
{
3.
int[] basic = new int[4];
4.
for (int i=0; i<basic.length; i++) {
basic[i] = i+1;
5.
6.
}
7.
for (int i=0;
i<basic.length; i++) {
8.
basic[i] = basic[i] *5;
9.
}
10.
for (int i=0; i<basic.length; i++) {
System.out.println(basic[i]);
11.
12.
}
13.
14. }
Because ArrayList is a Java class, we will need set and get methods to modify the ArrayList. The E
type refers to the base type of the ArrayList:
Return
Method
(Parameters)
Value
Description
Туре
add(E element)
boolean Appends the specified element to the end of this list.
add(int index, E
void
element)
get(int index)
E
set(int index, E
E
element)
size()
int
}
Inserts the specified element at the specified position in this list.
Returns the element at the specified position in this list.
Replaces the element at the specified position in this list with the
specified element. Returns the element previously at the specified
position.
Returns the number of elements in this list.
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