Question 1

Problem Ch 03-1
Assume an interactive Java program which asks the user for his/her first name and last name, and outputs the user's initials.
-Refer to Problem Ch 03-1. Write a method to extract the initial from the first name.

Accepted Answer

The answer of Problem Ch 03-1
Assume an interactive Java program...

Question 2

Problem Ch 03-1
Assume an interactive Java program which asks the user for his/her first name and last name, and outputs the user's initials.
-Refer to Problem Ch 03-1. For the program to get a name interactively a Scanner object must be instantiated. Write the Java statement to do this.

Accepted Answer

The answer of Problem Ch 03-1
Assume an interactive Java program...

Question 3

Problem Ch 03-1
Assume an interactive Java program which asks the user for his/her first name and last name, and outputs the user's initials.
-Refer to Problem Ch 03-1. Write a statement to guarantee that the initial will be a capital letter.

Accepted Answer

The answer of Problem Ch 03-1
Assume an interactive Java program...

Question 4

Why is it often a good idea to group particular elements together in a scene?

Accepted Answer

The answer of Why is it often a good idea...

Question 5

Problem Ch 03-1
Assume an interactive Java program which asks the user for his/her first name and last name, and outputs the user's initials.
-Refer to Problem Ch 03-1. Write a statement using a Scanner method to get the first name interactively.

Accepted Answer

The answer of Problem Ch 03-1
Assume an interactive Java program...

Question 6

What is a wrapper class? Why are wrapper classes useful?

Accepted Answer

The answer of What is a wrapper class? Why are...

Question 7

Given two String variables, s1 and s2, is it possible for (s1 != s2)to be true while (s1.equals(s2)) is also true? Why or why not?

Accepted Answer

The answer of Given two String variables, s1 and s2,...

Question 8

Write a statement to create a Color object equivalent to Color.ORANGE using the rgb method.

Accepted Answer

The answer of Write a statement to create a Color...

Question 9

What is autoboxing?

Accepted Answer

The answer of What is autoboxing?...

Quiz 3: Using Classes and Objects

Problem Ch 03-1 Assume an interactive Java program which asks the user for his/her first name and last name, and outputs the user's initials. -Refer to Problem Ch 03-1. Write a method to extract the initial from the first name.

Problem Ch 03-1 Assume an interactive Java program which asks the user for his/her first name and last name, and outputs the user's initials. -Refer to Problem Ch 03-1. For the program to get a name interactively a Scanner object must be instantiated. Write the Java statement to do this.

Problem Ch 03-1 Assume an interactive Java program which asks the user for his/her first name and last name, and outputs the user's initials. -Refer to Problem Ch 03-1. Write a statement to guarantee that the initial will be a capital letter.

Why is it often a good idea to group particular elements together in a scene?

Problem Ch 03-1 Assume an interactive Java program which asks the user for his/her first name and last name, and outputs the user's initials. -Refer to Problem Ch 03-1. Write a statement using a Scanner method to get the first name interactively.

What is a wrapper class? Why are wrapper classes useful?

Given two String variables, s1 and s2, is it possible for (s1 != s2)to be true while (s1.equals(s2)) is also true? Why or why not?

Write a statement to create a Color object equivalent to Color.ORANGE using the rgb method.

What is autoboxing?