Skip to content
geeksforgeeks
  • Courses
    • DSA to Development
    • Get IBM Certification
    • Newly Launched!
      • Master Django Framework
      • Become AWS Certified
    • For Working Professionals
      • Interview 101: DSA & System Design
      • Data Science Training Program
      • JAVA Backend Development (Live)
      • DevOps Engineering (LIVE)
      • Data Structures & Algorithms in Python
    • For Students
      • Placement Preparation Course
      • Data Science (Live)
      • Data Structure & Algorithm-Self Paced (C++/JAVA)
      • Master Competitive Programming (Live)
      • Full Stack Development with React & Node JS (Live)
    • Full Stack Development
    • Data Science Program
    • All Courses
  • Tutorials
    • Data Structures & Algorithms
    • ML & Data Science
    • Interview Corner
    • Programming Languages
    • Web Development
    • CS Subjects
    • DevOps And Linux
    • School Learning
  • Practice
    • Build your AI Agent
    • GfG 160
    • Problem of the Day
    • Practice Coding Problems
    • GfG SDE Sheet
  • Contests
    • Accenture Hackathon (Ending Soon!)
    • GfG Weekly [Rated Contest]
    • Job-A-Thon Hiring Challenge
    • All Contests and Events
  • Java Arrays
  • Java Strings
  • Java OOPs
  • Java Collection
  • Java 8 Tutorial
  • Java Multithreading
  • Java Exception Handling
  • Java Programs
  • Java Project
  • Java Collections Interview
  • Java Interview Questions
  • Java MCQs
  • Spring
  • Spring MVC
  • Spring Boot
  • Hibernate
Open In App
Next Article:
Java.Lang.Byte class in Java
Next article icon

Java.lang.Void Class in Java

Last Updated : 13 Sep, 2023
Comments
Improve
Suggest changes
Like Article
Like
Report

Java.lang.Void class is a placeholder that holds a reference to a class object if it represents a void keyword. It is an uninstantiable placeholder. Well, uninstantiable means that this class has a private constructor and no other constructor that we can access from outside. 

Methods of lang.void class is all inherited from Object class in Java:

  • getClass(): Returns the runtime class of the argument Object.
  • hashCode(): Returns a hash code value for the object.
  • equals(): Checks whether the two objects are equal or not.
  • clone(): Returns a copy of the object.
  • toString(): Returns string representation of the object.
  • notify(): Wakes up a single thread that is waiting on this object’s monitor.
  • notifyAll(): Wakes up all threads that is waiting on this object’s monitor.
  • wait(): Makes current thread to wait until previous thread invokes either notify() or notifyAll() methods.
  • finalize(): Called By the garbage collector on an object when garbage collection determines that there are no more references to the object.

Reference: 

Java Oracle docs

   



Next Article
Java.Lang.Byte class in Java

M

Mohit Gupta
Improve
Article Tags :
  • Java
  • Java-lang package
Practice Tags :
  • Java

Similar Reads

  • java.lang.MethodType Class in Java
    MethodType is a Class that belongs to java.lang package. This class consists of various types of methods that help in most of cases to find the method type based on the input object, or parameters of the method. All the instances of methodType are immutable. This means the objects of the methodType
    4 min read
  • Java.lang.Number Class in Java
    Most of the time, while working with numbers in java, we use primitive data types. But, Java also provides various numeric wrapper sub classes under the abstract class Number present in java.lang package. There are mainly six sub-classes under Number class.These sub-classes define some useful method
    9 min read
  • Java.Lang.Byte class in Java
    In Java, Byte class is a wrapper class for the primitive type byte which contains several methods to effectively deal with a byte value like converting it to a string representation, and vice-versa. An object of the Byte class can hold a single byte value. Constructors of Byte Class There are mainly
    6 min read
  • Java.lang.Package Class in Java
    In Java, the package class was introduced in JDK 1.2 to encapsulate version data associated with a package. As the number of packages increases, knowing the version of the package has become important. This versioning information is retrieved and made available by the ClassLoader instance that loade
    9 min read
  • Java.Lang.Double Class in Java
    Double class is a wrapper class for the primitive type double which contains several methods to effectively deal with a double value like converting it to a string representation, and vice-versa. An object of the Double class can hold a single double value. Double class is a wrapper class for the pr
    4 min read
  • java.lang.reflect.Method Class in Java
    java.lang.reflect.Method class provides necessary details about one method on a certain category or interface and provides access for the same. The reflected method could also be a category method or an instance method (including an abstract method). This class allows broadening of conversions to oc
    3 min read
  • Java.lang.ThreadLocal Class in Java
    This class provides thread-local variables. These variables differ from their normal counterparts in that each thread that accesses one (via its get or set method) has its own, independently initialized copy of the variable. Basically, it is another way to achieve thread safety apart from writing im
    4 min read
  • Java.lang.Boolean Class in Java
    Java provides a wrapper class Boolean in java.lang package. The Boolean class wraps a value of the primitive type boolean in an object. An object of type Boolean contains a single field, whose type is boolean. In addition, this class provides useful methods like to convert a boolean to a String and
    8 min read
  • Java.lang.Class class in Java | Set 1
    Java provides a class with name Class in java.lang package. Instances of the class Class represent classes and interfaces in a running Java application. The primitive Java types (boolean, byte, char, short, int, long, float, and double), and the keyword void are also represented as Class objects. It
    15+ min read
  • java.lang.reflect.Field Class in Java
    The ability of the software to analyze itself is known as Reflection. This is provided by the java.lang.reflect package and elements in Class .Field serves the same purpose as the whole reflection mechanism, analyze a software component and describe its capabilities dynamically, at run time rather t
    5 min read
geeksforgeeks-footer-logo
Corporate & Communications Address:
A-143, 7th Floor, Sovereign Corporate Tower, Sector- 136, Noida, Uttar Pradesh (201305)
Registered Address:
K 061, Tower K, Gulshan Vivante Apartment, Sector 137, Noida, Gautam Buddh Nagar, Uttar Pradesh, 201305
GFG App on Play Store GFG App on App Store
Advertise with us
  • Company
  • About Us
  • Legal
  • Privacy Policy
  • In Media
  • Contact Us
  • Advertise with us
  • GFG Corporate Solution
  • Placement Training Program
  • Languages
  • Python
  • Java
  • C++
  • PHP
  • GoLang
  • SQL
  • R Language
  • Android Tutorial
  • Tutorials Archive
  • DSA
  • Data Structures
  • Algorithms
  • DSA for Beginners
  • Basic DSA Problems
  • DSA Roadmap
  • Top 100 DSA Interview Problems
  • DSA Roadmap by Sandeep Jain
  • All Cheat Sheets
  • Data Science & ML
  • Data Science With Python
  • Data Science For Beginner
  • Machine Learning
  • ML Maths
  • Data Visualisation
  • Pandas
  • NumPy
  • NLP
  • Deep Learning
  • Web Technologies
  • HTML
  • CSS
  • JavaScript
  • TypeScript
  • ReactJS
  • NextJS
  • Bootstrap
  • Web Design
  • Python Tutorial
  • Python Programming Examples
  • Python Projects
  • Python Tkinter
  • Python Web Scraping
  • OpenCV Tutorial
  • Python Interview Question
  • Django
  • Computer Science
  • Operating Systems
  • Computer Network
  • Database Management System
  • Software Engineering
  • Digital Logic Design
  • Engineering Maths
  • Software Development
  • Software Testing
  • DevOps
  • Git
  • Linux
  • AWS
  • Docker
  • Kubernetes
  • Azure
  • GCP
  • DevOps Roadmap
  • System Design
  • High Level Design
  • Low Level Design
  • UML Diagrams
  • Interview Guide
  • Design Patterns
  • OOAD
  • System Design Bootcamp
  • Interview Questions
  • Inteview Preparation
  • Competitive Programming
  • Top DS or Algo for CP
  • Company-Wise Recruitment Process
  • Company-Wise Preparation
  • Aptitude Preparation
  • Puzzles
  • School Subjects
  • Mathematics
  • Physics
  • Chemistry
  • Biology
  • Social Science
  • English Grammar
  • Commerce
  • World GK
  • GeeksforGeeks Videos
  • DSA
  • Python
  • Java
  • C++
  • Web Development
  • Data Science
  • CS Subjects
@GeeksforGeeks, Sanchhaya Education Private Limited, All rights reserved
We use cookies to ensure you have the best browsing experience on our website. By using our site, you acknowledge that you have read and understood our Cookie Policy & Privacy Policy
Lightbox
Improvement
Suggest Changes
Help us improve. Share your suggestions to enhance the article. Contribute your expertise and make a difference in the GeeksforGeeks portal.
geeksforgeeks-suggest-icon
Create Improvement
Enhance the article with your expertise. Contribute to the GeeksforGeeks community and help create better learning resources for all.
geeksforgeeks-improvement-icon
Suggest Changes
min 4 words, max Words Limit:1000

Thank You!

Your suggestions are valuable to us.

What kind of Experience do you want to share?

Interview Experiences
Admission Experiences
Career Journeys
Work Experiences
Campus Experiences
Competitive Exam Experiences