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Java-Class and Object

28 posts

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

Converting Integer-String HashMap to String-Array-Integer HashMap in Java

Last Updated: 29 December 2023

Efficient Conversion of a HashMapInteger, String into another HashMapString, Integer[] involves organizing integer keys based on their corresponding string values. Here's ...read more

Java-Collections

Java-Class and Object

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

Difference Between Object and Instance in Java

Last Updated: 24 October 2023

The object is an instance of a class. A class is like a blueprint or template that defines the properties and behavior of objects. When we create an object we are creating...read more

Difference Between

Geeks Premier League

Java-Class and Object

Geeks Premier League 2023

Creating Multiple Pools of Objects of Variable Size in Java

Last Updated: 23 July 2025

Object pool pattern is a software creational design pattern that is used in situations where the cost of initializing a class instance is very high. Basically, an Object p...read more

article_image

Java-Class and Object

Class Data Sharing in Java

Last Updated: 23 July 2025

Here we will be discussing one of the features introduced as an ailment in Java10. Here we will be discussing one of the features named class data sharing popularly known ...read more

article_image

Java-Class and Object

Object Resurrection in Java

Last Updated: 23 July 2025

In object-oriented programming languages with garbage collection, object resurrection is when an object comes back to life during the process of object destruction, as a s...read more

Java-Class and Object

How to Create Custom Class in Java?

Last Updated: 23 July 2025

Class is the collection of objects. Class is not a real-world entity it is just only templates and prototypes or blueprints. Class does not occupy memory. We can write a c...read more

Java-Class and Object

Class Level Lock in Java

Last Updated: 23 July 2025

Every class in Java has a unique lock which is nothing but class level lock. If a thread wants to execute a static synchronized method, then the thread requires a class l...read more

Java-Multithreading

Java-Class and Object

Object Level Lock in Java

Last Updated: 01 April 2024

Every object in Java has a unique lock. Whenever we are using a synchronized keyword, then only the lock concept will come into the picture. An object-level lock is a mech...read more

Java-Multithreading

Java-Class and Object

StringBuilder Class in Java

Last Updated: 26 July 2025

In Java, the StringBuilder class is a part of the java.lang package that provides a mutable sequence of characters. Unlike String (which is immutable), StringBuilder allow...read more

article_image

Java-lang package

Java-Class and Object

Java-StringBuilder

util.Arrays vs reflect.Array in Java with Examples

Last Updated: 11 July 2025

Array class in java.lang.reflect package is a part of the Java Reflection. This class provides static methods to create and access Java arrays dynamically. It is a final c...read more

Java - util package

Java-Class and Object

java-reflection-array

Java-Array-Programs

Reflection Array Class in Java

Last Updated: 11 July 2025

The Array class in java.lang.reflect package is a part of the Java Reflection. This class provides static methods to create and access Java arrays dynamically. It is a fin...read more

Java-Class and Object

java-reflection-array

Future and FutureTask in java

Last Updated: 11 July 2025

Prerequisite: Future and callableFuture:A Future interface provides methods to check if the computation is complete, to wait for its completion and to retrieve the results...read more

article_image

Technical Scripter

Technical Scripter 2018

Java-Class and Object

java-interfaces

Count number of a class objects created in Java

Last Updated: 11 July 2025

The idea is to use static member in the class to count objects. A static member is shared by all objects of the class, all static data is initialized to zero when the fir...read more

Technical Scripter

Technical Scripter 2018

Java-Class and Object