Core java

1. Introduction In this article, we will look into How to Convert System.nanoTime() to Seconds in Java. We will look at different solutions to this problem in detail with working examples. Let us first have a quick look into the System.nanoTime() method in Java. 2. System.nanoTime() Method The System.nanoTime() method is a static method of […]

In this article, we will look at How to Update the Value of a Key in HashMap in Java. We will look at different solutions to this problem in detail with working examples. It is recommended to learn about the concept of collections particularly HashMaps in Java and their working for a seamless understanding. Now, […]

In this article, you will learn about accessing a variable from another class in a Java Program. To be able to program in any programming language, it is very critical to be able to understand how to use the variables according to your need, and thus it makes it very important to be able to […]

Introduction In this article, we will look at how to Create an Array of Linked Lists in Java. We will look at ways to create an Array of Linked Lists or a List of Linked Lists in detail with working examples. Let us first have a quick peek into the concept of Linked Lists in […]

Introduction In this article, we will discuss and dwell on how to compare dates in Java. The problem statement is : Check if a Date is between two dates in Java. This roughly translates to Given a date, we need to check if it lies between the range of two dates. Let us understand this […]

Introduction In this article, we will have a look on How to Convert UUID to String in Java. We will also shed some light on the concept of UUID, its use, and its corresponding representation in Java class. Let us have a quick look at UUID. UUID: UUID stands for Universally Unique Identifier which identifies […]

Before enrolling in an AWS DevOps Certification training program or exam, you should research the credential. The AWS DevOps Certification is a great way to boost your IT career, and when most people think of AWS- the first thing that comes to mind is the certification. It covers all areas a developer needs to get […]

Introduction In this article, we will look at How to Create an Array from 1 to n in Java. We need to Initialize Arrays in a sequence of values ranging from 1 to number N. Knowing how we can initialize arrays in different ways will give us deeper insights into Array in Java and allow […]

1. Introduction Java developers often face the challenge of compatibility issues, such as the unsupported class file major version 61" error. This problem arises when a Java program, compiled with Java 17 (denoted by major version 61), is run on a Java version that’s older than Java 17. This guide is crafted to be beginner-friendly […]