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TreeMap is a class of Java Collection Framework that implements NavigableMap Interface. It stores the elements of the map in a tree structure and provides an efficient alternative to store the key-value pairs in sorted order. Note that while creating objects of TreeMap we need to use the comparable interface so that we can maintain the sorting order of its elements. In this article, we are going to discuss a few Java programs to create TreeMap objects using comparable interface. Java Program to create TreeMap Objects using Comparable Interface Before jumping to the Java program ... Read More
In the vast landscape of Java programming, one of the most intriguing aspects is its choice of variable naming. Among these, the use of the underscore (_) is a topic that has sparked much discussion and debate. This article will delve into the usage of underscore as a variable name in Java, exploring its evolution across different Java versions and its current status in the Java programming world. The Saga of the Underscore in Java A unique aspect of Java programming lies in its allowance for naming variables. Underscore, or "_", is a valid character that can be used in ... Read More
User registration is a fundamental part of building interactive and personalized applications. Back4App, an efficient Backend as a Service (BaaS) platform, can streamline this process, making user registration in Android apps an effortless task. In this article, we will take a comprehensive look at how you can implement user registration in your Android application using Back4App. Understanding Back4App Back4App, built upon the open-source Parse Server, offers an easy-to-use, scalable, and customizable backend for mobile and web applications. It simplifies complex backend operations like data storage, user authentication, and real-time synchronization, enabling developers to focus on creating great user experiences Setting ... Read More
In the sphere of Android application development, user authentication forms the cornerstone of ensuring app security and personalized user experience. In this arena, a tool that is gaining popularity among developers worldwide is Back4App. This article explores how Back4App can be harnessed to implement user login functionality in Android applications. Introduction to Back4App Back4App is an open-source, scalable, and flexible backend as a service (BaaS) platform. It leverages Parse, a leading open-source backend framework, which simplifies backend operations like user authentication, data storage, and real-time notifications. Setting Up Back4App for User Login in Android Before diving into the code, let's ... Read More
Speedometer charts are a fantastic method to dynamically and engagingly display progress or performance and visually depict data. Whether you want to track important metrics, show achievement levels, or show survey findings, a speedometer chart may provide your Excel reports a polished, clear look. In this tutorial, we'll walk you through each step of making an Excel speedometer chart. We'll go through the essential ideas, look at various design alternatives, and give you useful advice on how to improve and customise your chart to meet your individual requirements. Don't worry if you're new to Excel or only have a little ... Read More
"int cannot be dereferenced", a common error in Java that may occur while converting a variable of integer type into String or while comparing it with other primitive type variables. It might be difficult to debug for a beginner programmer, but once we get the alternative ways of converting and comparing integers, it will become a piece of cake for us. Try to stick with us till the end of this article to find the reasons and possible solutions for fixing the 'int cannot be dereferenced error'. How to Fix int cannot be dereferenced Error in Java ... Read More
With the help of Excel, you can show data in a way that is both aesthetically pleasing and simple to comprehend. When you want to illustrate how various categories fit together to form a broader whole, stacked bar/column charts are especially helpful. In this tutorial, we'll show you step−by−step how to use Excel's built−in capabilities to create a stacked bar/column chart. You don't need any prior Excel or data visualisation knowledge to follow along because we'll start with the fundamentals and work our way up to more complex strategies. You will have a firm grasp on how to make ... Read More
A heap dump is a snapshot of the memory more specifically the Java heap memory of a Java process at a certain point in time. It contains information about the Java objects and classes. Heap dumps are useful when we need to debug memory problems such as memory leaks, high memory consumption, and out of memory errors. Java provides several ways to capture these heap dumps that we are going to explore in this article. Ways to Capture Java Heap Dumps The following ways can be used to capture Java heap dumps: ... Read More
Excel is a strong data−organization and analysis tool, and hidden worksheets are frequently encountered when working on complicated spreadsheets. These hidden worksheets can occasionally be confusing and have an impact on the general functionality of your Excel document. This tutorial will walk you through the process of discovering and deleting hidden worksheets in Excel. This tutorial will equip you with the knowledge and techniques you need to clean up your workbook or simply delete superfluous sheets. By the end of this course, you will understand how to detect and remove hidden worksheets in Excel, allowing you to manage and ... Read More
Unicode is an international character set that encompasses a vast range of characters, symbols, and scripts from many languages across the globe. Java programming language, being platform-independent, has built-in support for Unicode characters, allowing developers to create applications that can work seamlessly with diverse languages and scripts. In Java, the char data type is used to store Unicode characters, and character literals are used to represent these characters in the source code. A character literal is a single Unicode character enclosed in single quotes (' ') and can be assigned directly to a char variable. Algorithm Step 1 ... Read More