Starting Out with Java: Early Objects (6th Edition)
6th Edition
ISBN: 9780134462011
Author: Tony Gaddis
Publisher: PEARSON
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Textbook Question
Chapter 4, Problem 16PC
Magic Dates
The date June 10, 1960, is special because when we write it in the following format, the month times the day equals the year.
6/10/60
Design a class named MaginData. The class constructor should accept, as integers, values for a month, a day, and a year. The class should also have a method named isMagic that returns true if the date passed to the constructor is magic, or false otherwise.
Write a
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01____Write a program that calculates the average of courses, overall grade, and letter grade. Suppose that your students take four courses - English, Mathematics, Science, and History. You should design a class that accepts all four course's numeric scores, calculates average and overall grade, and decides letter grade based on the overall grade. Your class should have a constructor, get and set methods of each course, a method that calculates the average of four courses, a method that calculates overall grade, and a method that decides letter grade. The overall grades are calculated as the following rate:
Average of All four courses: 50%
Quiz: 40%
Attendance: 10%
The letter grade is based on the following:
90.0 to 100.0 - A
80.0 to 89.9 - B
70.0 to 79.9 - C
65.0 to 69.9 - D
less than 65 - F
Your program demonstrates the class by asking the user to input four-course numeric scores, creating an object, and then reporting each course's score, average, overall grade, and letter…
Part-1: Write a program that includes in its class the following methods:
1. A method named printChars that takes two characters and an integer with the following
header:
public static void printChars (char chl, char ch2, int numberPerLine)
This method prints the characters between ch1 and ch2 with the specified numbers per line.
Characters are separated by exactly one space.
2. A method named getLetters that takes two characters and an integer and returns a String
with the following header:
public static String getLetters (char ch1, char ch2, int numberPerLine)
This method returns a String that includes the uppercase and lowercase English letters
between ch1 and ch2 with the specified numbers per line. Letters are separated by exactly
one space.
3. In your main method, use the methods you implemented to:
a. Print all characters between 1 and Z, ten characters per line.
b. Print all English letters between S and j, five characters
per
line.
Feet to Meters/Miles Conversion
1. Create a class called Distance
2.
Add to this class a main method.
3.
In the main method do the following:
Declare a variable to represent a feet value that can hold floating point numbers. Assign 750 to
it.
a.
b.
C.
d.
e.
Declare a variable to represent a meter value that can hold floating point numbers. Calculate the
equivalent distance in meters based on the feet variable. (Note 1 ft = .305 meters).
Declare a variable to represent a miles value that can hold floating point numbers equal to the
feet value. Using a Compound Assignment Operator, (e.g. +=), calculate the equivalent mile value
based on the feet value, (the value of mile before completing this step). (Note 1 ft = .00019)
Print out to the console each of the variable values, each on a new line in this order:
Feet: [feet value]
Meters: [meter value]
Miles: [mile value]
For example, your output should be:
Feet: 750.0
Meters: 228.75
Miles: 0.14250000000000002
Chapter 4 Solutions
Starting Out with Java: Early Objects (6th Edition)
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