Prev Next

Java / Object, Class and Package

Role of Runtime and System class in Java.

Runtime class provides access to the Java runtime system to retrieve information like memory availability, invoking the garbage collector, etc.

System class provides access to system resources. It enables access to standard input/output, error output streams, current time in millis, terminating the application, etc.

Invest now in Acorns!!! 🚀 Join Acorns and get your $5 bonus!

Invest now in Acorns!!! 🚀
Join Acorns and get your $5 bonus!

Earn passively and while sleeping

Acorns is a micro-investing app that automatically invests your "spare change" from daily purchases into diversified, expert-built portfolios of ETFs. It is designed for beginners, allowing you to start investing with as little as $5. The service automates saving and investing. Disclosure: I may receive a referral bonus.

Invest now!!! Get Free equity stock (US, UK only)!

Use Robinhood app to invest in stocks. It is safe and secure. Use the Referral link to claim your free stock when you sign up!.

The Robinhood app makes it easy to trade stocks, crypto and more.

Webull! Receive free stock by signing up using the link: Webull signup.

More Related questions...

How to implement cloning? Object Cloning. Can a Java source file have more than one class declaration? Example of a final class in Java API. What is the data type of System.out? Can we have two classes with same name under the same package? Can we have class name same as the interface name under the same package? What is the base class of all classes? Could a Java class file exists even without filename and only extension(.java)? Anonymous class. Difference Between ClassNotFoundException & NoClassDefFoundError. ClassNotFoundException Example. Dynamic class loading. Difference: Class.forName() vs ClassLoader.loadClass(). Which class implements clone method- Cloneable or Object in Java? Why Custom ClassLoader is required in Java? How does Java ClassLoader Work? When are class static variables loaded in memory in Java? Describe the principle of Java class loader. When a class is loaded in Java? When a class is initialized in Java? What are the rules of class initialization in Java? What is a Local class in Java? Different type of cloning in Java. Explain Shallow copy in Java. Explain deep copy in Java. Difference between shallow and deep copy in Java. What is Serialization in Java? Explain De-serialization in Java. Difference between readObject and readResolve in Java serialization. Why is Class.newInstance() is discouraged to use? Difference between Static block and initializer block in Java. What is static class in Java? Role of Runtime and System class in Java. Can an anonymous class have constructor? What are the Object class methods? Can you override Object class getClass method? When shallow object copy is preferred? How to implement equals method correctly? Good implementation of hashCode method in Java. Java equals() vs. compareTo() contract. Can two objects which are not equal have the same hashCode? What happens when equals() is not consistent with compareTo() method? Difference between instanceof and getClass() method for checking type inside equals.
Show more question and Answers...

Variable

Comments & Discussions

Interviews Questions

About Javapedia.net

Javapedia.net is for Java and J2EE developers, technologist and college students who prepare of interview. Also this site includes many practical examples.

This site is developed using J2EE technologies by Steve Antony, a senior Developer/lead at one of the logistics based company.

contact: javatutorials2016[at]gmail[dot]com

Kindly consider donating for maintaining this website. Thanks.

Copyright © 2026, javapedia.net, all rights reserved. privacy policy.

DMCA.com Protection Status