Answered: USING JAVA, specify, design, and…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

See similar textbooks

Related questions

Question

USING JAVA,

specify, design, and implement a class called statistician. After a statistician is initialized, it can be given a sequence of double numbers. Each number in the sequence is given to the statistician by activating a member function called next_number. For example, we can declare a statistician called s, and then give it the sequence of numbers 1.1, -2.4, 0.8 as shown here:

statistician s;

s.next_number(1.1);

s.next_number(-2.4);

s.next_number(0.8);

After a sequence has been given to a statistician, there are various member funcitons to obtain infomration about the sequence. Include member functions that will provide the length of the sequence, the last number of the sequence, the sum of all the numbers in the sequence, the arithmetic mean of the numbers(i.e the sum of the numbers divided by the length of the sequence), the smallest number inthe sequence, and the largest number in the sequence. Notice that the length and sum functions can be called at any time, even if there are no enumbers in the sequence. In this case of an "empty" sequence, both length and sum will be zero. But the other member functions all have a precondition requiring that the sequence is non-empty.

You should also provide a member funciton that erases the sequene ( so that the statistician can start afresh with a new sequenece).

Notes: Do not try to store the entire sequence(because you don't know how long this sequence will be). Instead, just store the necessary information about the sequence: What is the sequence lenghth? What is the sum of the numbers in the sequence? What are the last, smallest and largest numbers? Each of these pieces of information can be stored in a private member variable that is updated whenever next_number is activated.

Specify, design, and implement a class
2
called Statistician. After a statistician is
initialized, it can be given a sequence of
double numbers. Each number in the sequence is
given to the statistician by activating a method
called nextNumber. For example, we can declare a
statistician called s and then give it the
numbers 1.1, -2.4, 0.8, as shown here:
sequence
of
Statistician s = new Statistician();
s.nextNumber(1.1);
s.nextNumber(-2.4);
s. nextNumber(0.8);
After a sequence has been given to a statistician,
there are various methods to obtain information
about the sequence. Include methods that will pro-
vide the length of the sequence, the last number of
the sequence, the sum of all the numbers in the
sequence, the arithmetic mean of the numbers (i.e.,
the sum of the numbers divided by the length of the
sequence), the smallest number in the sequence, and
the largest number in the sequence. Notice that the
length and sum methods can be called at any time,
even if there are no numbers in the sequence. In this
ordinates x, y, and z. After rotating this location by
an angle 0, the location will have new coordinates,
which we'll call x' , y', and z'. The equations for the
new coordinates use the java.lang methods
Math.sin and Math.cos, as shown here:
After a 0 rotation around the x-axis:
x' = x
y' = y cos (0) – z sin(0)
z' = y sin(0) +z cos(0)
After a 0 rotation around the y-axis:
x' = x cos (0)+z sin(0)
y' = y
z' = -x sin (0) + z cos (0)
After a 0 rotation around the z-axis:
x' = x cos (0) –y sin(0)
y' = x sin (0) + y cos(0)
z = Z

Expert Solution

Trending now

This is a popular solution!

Step by step

Solved in 3 steps with 3 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.

Similar questions