Exercise 3 - User Name GeneratorAdd a new class to the Lab2 project called UserNameGenerator. This should implement aprogram that reads the user's first and last name (separately), then prints a String composed ofthe first 4 letters of the user's last name, followed by the first letter of the user's first name,followed by a random number in the range of 10 to 99 (inclusive). You can assume the firstname is at least one letter long and the last name is at least 4 letters. Exercise 4 - Floating-point Number ComparisonAdd a new class to the Lab2 project called FloatEqu. This should implement a program thatperforms the following:a) Declare a double variable and initialize it to (1.0/10) * (1.0/10)Declare another double variable and initialize it to (1.0/100)Insert an if . else statement and print out "EQUAL" if both variables are equal (use ==)and "NOT EQUAL" otherwise. Run the program and check the output. Is it what you wouldexpect?b) Modify the program by adding an ifapproximately equal, using the approach discussed in the lecture. That is, take the absolutevalue of the difference between the two numbers, and check if it is lower than theTOLARANCE value (some very small number). The TOLARANCE should be a constant set atthe beginning of the program, like this:else statement to determine if the variables are..final double TOLARANCE = 0.000001;The keyword final makes it a constant, which means Java will make sure we don'taccidentally change the value.Note: to take the absolute value of a number, use Math.abs ()

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Exercise 3 - User Name Generator Add a new class to the Lab2 project called UserNameGenerator. This should implement a program that reads the user's first and last name (separately), then prints a String composed of the first 4 letters of the user's last name, followed by the first letter of the user's first name, followed by a random number in the range of 10 to 99 (inclusive). You can assume the first name is at least one letter long and the last name is at least 4 letters.

Exercise 3 - User Name Generator Add a new class to the Lab2 project called UserNameGenerator. This should implement a program that reads the user's first and last name (separately), then prints a String composed of the first 4 letters of the user's last name, followed by the first letter of the user's first name, followed by a random number in the range of 10 to 99 (inclusive). You can assume the first name is at least one letter long and the last name is at least 4 letters.

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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Question

Exercise 3 - User Name Generator
Add a new class to the Lab2 project called UserNameGenerator. This should implement a
program that reads the user's first and last name (separately), then prints a String composed of
the first 4 letters of the user's last name, followed by the first letter of the user's first name,
followed by a random number in the range of 10 to 99 (inclusive). You can assume the first
name is at least one letter long and the last name is at least 4 letters.

Exercise 4 - Floating-point Number Comparison
Add a new class to the Lab2 project called FloatEqu. This should implement a program that
performs the following:
a) Declare a double variable and initialize it to (1.0/10) * (1.0/10)
Declare another double variable and initialize it to (1.0/100)
Insert an if . else statement and print out "EQUAL" if both variables are equal (use ==)
and "NOT EQUAL" otherwise. Run the program and check the output. Is it what you would
expect?
b) Modify the program by adding an if
approximately equal, using the approach discussed in the lecture. That is, take the absolute
value of the difference between the two numbers, and check if it is lower than the
TOLARANCE value (some very small number). The TOLARANCE should be a constant set at
the beginning of the program, like this:
else statement to determine if the variables are
..
final double TOLARANCE = 0.000001;
The keyword final makes it a constant, which means Java will make sure we don't
accidentally change the value.
Note: to take the absolute value of a number, use Math.abs ()

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