Prev Next

Java / Object, Class and Package

Describe the principle of Java class loader.

Java ClassLoader is based on the following 3 principles.

Delegation principle delegates the classloading request to parent class loader and loads the class only if parent is not able to find or load class.

Visibility principle allows child class loader to access all the classes loaded by parent ClassLoader, while parent class loader cannot see classes loaded by its child.

Uniqueness principle allows to load a class exactly once.

More Related questions...

Object Cloning. How to implement 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.

Follow Javapedia updates

contact: javatutorials2016[at]gmail[dot]com

Kindly consider donating for maintaining this website. Thanks.

Copyright © 2026, javapedia.net, all rights reserved. · .

DMCA.com Protection Status