Answered: Generate 5000 random numbers in the…

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

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Generate 5000 random numbers in the range of [-16 to +16] both values are inclusive. Find and print the average of all of these 5000 random numbers.

Importing classes from Java API.

Instantiation: Making objects from Classes

Random is another class in “java.util” package used for generating random numbers in various forms. Randomness has many uses and applications in science, art, statistics, cryptography, gaming, and other fields. For example, random numbers helps scientists to test hypotheses. Random numbers also have a lot of applications in video games production and other simulation fields.

Again the “new” operator can be used to create an instance (object-ref) of this class. In other words, by using the “new” operator with the constructor method, you can create a new object-Ref of this class and then through the object-Ref we can call the methods defined in the Random class.

Random myRand = new Random();

Among the many methods defined in the Random class, few methods are selected and summarized below: (copied directly from API)

nextDouble() Returns the next pseudorandom, uniformly distributed double value between 0.0 and 1.0 from this random number generator's sequence.

nextFloat() Returns the next pseudorandom, uniformly distributed float value between 0.0 and 1.0 from this random number generator's sequence.

nextInt() Returns the next pseudorandom, uniformly distributed int value from this random number generator's sequence.

nextInt (int bound) Returns a pseudorandom, uniformly distributed int value between 0 (inclusive) and the specified value (exclusive), drawn from this random number generator's sequence.

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