
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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I need help with Java code.
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Transcribed Image Text:4. Many private water wells produce only 1 or 2 gallons of water per minute. One way to avoid running out of water with these low-
yield wells is to use a holding tank. A family of 4 will use about 250 gallons of water per day. However, there is a "natural" water
holding tank in the casing (i.e. the hole) of the well itself. The deeper the well, the more water that will be stored that can be
pumped out for household use. But how much water will be available?
Write a method that allows the user to input the radius of the well casing in inches (a typical well will have a 3 inch radius) and the
depth of the well in feet (assume water will fill this entire depth, although in practice that will not be true since the static water
level will generally be 50 feet or more below the ground surface). The program should output the number of gallons stored in the
well casing.
For your reference:
The volume of a cylinder is where r is the radius and h is the height.
1 cubic foot = 7.48 gallons of water.
For example, a 300 foot well full of water with a radius of 3 inches for the casing holds about 441 gallons of water -- plenty for a
family of 4 and no need to install a separate holding tank.
5. The Harris-Benedict equation estimates the number of calories your body needs to maintain your weight if you do no exercise.
This is called your basal metabolic rate or BMR.
The calories needed for a woman to maintain her weight is:
BMR = 655+ (4.3 * weight in pounds) + (4.7 * height in inches) - (4.7 * age in years)
The calories needed for a man to maintain his weight is:
BMR = 66+ (6.3 * weight in pounds) + (12.9 * height in inches) - (6.8 * age in years)
A typical chocolate bar will contain around 230 calories.
Write a method that allows the user to input their weight in pounds, height in inches, and age in years. The program should then
output the number of chocolate bars that should be consumed to maintain one's weight for both a woman and a man of the input
weight, height, and age.
6. Write a method that reads three strings from the keyboard. Although the strings are in no particular order, display the string that
would be second if they were arranged lexicographically.

Transcribed Image Text:Directions
Write a program that calls methods for each of the following mini problems from its main method.
Us a single Scanner for the program declared in the class as
private Static Scanner keyboard = new Scanner(System.in);
1. Write a method that reads two strings from the user's keyboard. Display each string, along with its width, on two separate lines.
Then create a new string by joining the two strings with a space between them. Display the new string and its length on a new
separate line.
2. Write a method that reads a line of text from the keyboard and then displays the line, but with the first occurrence of hate
changed to love. For example, a possible sample dialogue might be
Enter a line of text.
I hate you.
I have rephrased that line to read:
I love you.
You can assume that the word hate occurs in the input. If the word hate occurs more than once in the line, your program will
replace only its first occurrence.
3. Write a method that asks the user to enter a favorite color, a favorite food, a favorite animal, and the first name of a friend or
relative. The program should then print the following two lines, with the user's input replacing the items in italics: I had a dream
that Name ate a Color Animal and said it tasted like Food!
For example, if the user entered blue for the color, hamburger for the food, dog for the animal, and Jake for the person's name, the
output would be
I had a dream that Jake ate a blue dog and said it tasted like hamburger!
Don't forget to put the exclamation mark at the end.
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