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Java-Object Oriented

60 posts

Java OOP Interview Questions

Last Updated: 27 August 2025

Java is a pure object-oriented programming language (with minor exceptions like primitives). OOP is one of the most frequently tested topics in interviews. It models real-...read more

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Java-Object Oriented

Mutable and Immutable Objects in Java

Last Updated: 23 July 2025

Java is a popular object-oriented programming (OOP) language and it's code design revolves around it's objects and their manipulation. One of the key concepts in this OOP ...read more

Java-Object Oriented

Class and Object

Java-Class and Object

dot(.) Operator in Java

Last Updated: 12 September 2024

The dot (.) operator is one of the most frequently used operators in Java. It is essential for accessing members of classes and objects, such as methods, fields, and inner...read more

Java-Object Oriented

Why Java doesn't support Multiple Inheritance?

Last Updated: 23 July 2025

Multiple Inheritance is a feature provided by OOPS, it helps us to create a class that can inherit the properties from more than one parent. Some of the programming langua...read more

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Java-Object Oriented

java-inheritance

How to Compare Objects by Multiple Fields in Java?

Last Updated: 23 July 2025

In Java, A comparator interface is used to order the objects of user-defined classes. A comparator object is capable of comparing two objects of the same class. In this ar...read more

Java-Object Oriented

Java Exercises - Basic to Advanced Java Practice Programs with Solutions

Last Updated: 09 October 2025

This Java exercise collection is designed to deepen your understanding of Java and refine your coding skills. The programs provide hands-on experience in solving real-worl...read more

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Output of Java Program

Java-Object Oriented

Java-Data Types

Java Program to Sort Items By Weight

Last Updated: 29 December 2023

Given two array items and weights which denotes items and their respective weights. Both arrays are of equal length. For every index 'i', items[i] and weights[i] represent...read more

Java-Object Oriented

Java-Class and Object

java-priority-queue

Diamond Problem in Java

Last Updated: 22 August 2025

The Diamond Problem is a well-known issue in programming languages that support multiple inheritance, where a class inherits the same method from more than one parent clas...read more

Java-Object Oriented

java-inheritance

7 OOP Design Principles Java Programmers Should Learn in 2023

Last Updated: 23 July 2025

Java is one of the most widely-used object-oriented programming languages today, known for its robustness, cross-platform compatibility, and user-friendly syntax. Java dev...read more

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Java-Object Oriented

Anonymous Object in Java

Last Updated: 28 April 2025

In Java, an anonymous object is an object that is created without giving it a name. Anonymous objects are often used to create objects on the fly and pass them as argument...read more

Java-Object Oriented

Rules of Downcasting Objects in Java

Last Updated: 23 July 2025

Typecasting is one of the most important concepts which basically deals with the conversion of one data type to another datatype implicitly or explicitly. In this article,...read more

Java-Object Oriented

Types of Classes in Java

Last Updated: 17 April 2024

A class is a blueprint in the Java programming language from which an individual object can be built. In Java, we may declare a class by using the class keyword. Class mem...read more

Java-Object Oriented

How to Access Inner Classes in Java?

Last Updated: 23 July 2025

In Java, inner class refers to the class that is declared inside class or interface which were mainly introduced, to sum up, same logically relatable classes as Java is pu...read more

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Java-Object Oriented

Object Model in Java

Last Updated: 28 January 2022

The object model is a system or interface which is basically used to visualize elements in terms of objects in a software application. It is modeled using object-oriented ...read more

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Java-Object Oriented

Static Synchronization in Java

Last Updated: 23 July 2025

Synchronization is the potential to regulate the access of multiple threads to any shared resource. Synchronization in Java is essential for reliable communication between...read more

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Java-Object Oriented