How to Generate Random Integers (and Doubles) Within a Specific Range in Java?
Math.random() Manipulation: Generating Random Integers Within a Specified Range
The Java function Math.random() generates random numbers within the range [0, 1). However, there are situations where you may need to obtain random integers within a specific range. This article demonstrates how to achieve this using Math.random().
Intention to Generate a Random Integer Between Three and Five
While the statement "(int) Math.random() * 5 3" does not correctly generate random integers within the range [3, 5], it can be corrected using a custom method:
int randomWithRange(int min, int max) { int range = (max - min) + 1; return (int) (Math.random() * range) + min; }
This method calculates the range of possible values, multiplies it by Math.random(), and adds the minimum value to ensure inclusivity.
Output Example
System.out.println(randomWithRange(3, 5)); // Output: 3
Idiot-Proofing for Incorrect Ordering
To prevent errors if min is greater than max, an updated method is:
int randomWithRange(int min, int max) { int range = Math.abs(max - min) + 1; return (int) (Math.random() * range) + (min <p><strong>Extensions for Double Random Number Generation</strong></p><p>A similar method can be used to generate random double-precision numbers:</p><pre class="brush:php;toolbar:false">double randomWithRange(double min, double max) { double range = (max - min); return (Math.random() * range) + min; }
Using this method:
System.out.println(randomWithRange(3.0, 5.0));
The above is the detailed content of How to Generate Random Integers (and Doubles) Within a Specific Range in Java?. For more information, please follow other related articles on the PHP Chinese website!

The article discusses using Maven and Gradle for Java project management, build automation, and dependency resolution, comparing their approaches and optimization strategies.

The article discusses creating and using custom Java libraries (JAR files) with proper versioning and dependency management, using tools like Maven and Gradle.

The article discusses implementing multi-level caching in Java using Caffeine and Guava Cache to enhance application performance. It covers setup, integration, and performance benefits, along with configuration and eviction policy management best pra

The article discusses using JPA for object-relational mapping with advanced features like caching and lazy loading. It covers setup, entity mapping, and best practices for optimizing performance while highlighting potential pitfalls.[159 characters]

Java's classloading involves loading, linking, and initializing classes using a hierarchical system with Bootstrap, Extension, and Application classloaders. The parent delegation model ensures core classes are loaded first, affecting custom class loa


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

SublimeText3 English version
Recommended: Win version, supports code prompts!

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function