Core java

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. System.nanoTime() The System.nanoTime() method is a static method of the System class […]

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 […]

In this post, we will see how to fix Unsupported class file major version 61 in Java. Reason for Unsupported class file major version 61 in Java You will get this error when you have compiled the class with Java 17(major version 17) and you are trying to run class file under lower java version […]