Problem 20 Write a statement that creates a... [FREE SOLUTION]

Chapter 8: Problem 20

Write a statement that creates an ArrayList object and assigns its address to a variable named lizards. The ArrayList should be able to store String objects only.

Short Answer

Expert verified

Answer: To create an ArrayList that can store only String objects and assign its address to a variable named "lizards", follow these steps: 1. Import the ArrayList class from the java.util package using "import java.util.ArrayList;". 2. Declare an ArrayList variable named "lizards" by writing "ArrayList lizards;". 3. Create an ArrayList object and assign its address to the "lizards" variable using "lizards = new ArrayList();".

Step by step solution

Import the ArrayList class

To work with ArrayList in Java, we need to import the ArrayList class from the java.util package. To do this, add the following import statement at the beginning of your code: ```java import java.util.ArrayList; ```

Declare an ArrayList variable

Next, we will declare a variable named "lizards" of type ArrayList. This informs the program that the variable "lizards" should store an ArrayList object that can only hold String objects. Add the following code line in your code: ```java ArrayList lizards; ```

Create an ArrayList object and assign its address to the lizards variable

In this step, we will create an ArrayList object that can store String objects and assign its address to the "lizards" variable. To create the ArrayList object, we use the "new" keyword followed by "ArrayList()". Add the following code: ```java lizards = new ArrayList(); ``` Now you have successfully created an ArrayList object that stores String objects only and assigned its address to a variable named "lizards". The complete code looks like this: ```java import java.util.ArrayList; public class LizardsList { public static void main(String[] args) { ArrayList lizards; lizards = new ArrayList(); } } ```

Unlock Step-by-Step Solutions & Ace Your Exams!

Full Textbook Solutions
Get detailed explanations and key concepts
Unlimited Al creation
Al flashcards, explanations, exams and more...
Ads-free access
To over 500 millions flashcards
Money-back guarantee
We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Recommended explanations on Computer Science Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

91影视

Write a statement that creates an ArrayList object and assigns its address to a variable named lizards. The ArrayList should be able to store String objects only.

Short Answer

Step by step solution

Import the ArrayList class

Declare an ArrayList variable

Create an ArrayList object and assign its address to the lizards variable

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Computer Science Textbooks

Problem Solving Techniques

Databases

Cybersecurity in Computer Science

Theory of Computation

Big Data

Algorithms in Computer Science

Study anywhere. Anytime. Across all devices.