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The debate about JavaEE and Spring is very common among Java developers. Both technologies emerged as popular frameworks for building enterprise applications using Java. Java EE is a more adaptable and distributed framework for developing big software. Spring, on the other hand, is open source and makes use of the POJO programming model to develop any type of Java application. Let’s find out more detailed differences between JavaEE and Spring through this article. JavaEE vs Spring JavaEE Java Platform Enterprise Edition, in short JavaEE is a set of specifications defined by Oracle. It is also known as J2EE. It aims ... Read More
To get the set view of keys from a HashMap in Java, we can use the in-built method named ‘keySet()’. Here, the HashMap is a class that is used to implement Map Interface. It stores its element in key-value pairs. The Key is an object that is used to fetch and receive value associated with it. It has access to all the methods of Map Interface, it does not have any additional methods of its own. Duplicate values are not allowed, although we can store null values and keys. Java Program to Get Set View of Keys from HashMap keySet() ... Read More
To get the synchronized Map from a Hash Map in Java, we can use an in-built method of Collection interface named ‘synchronized Map()’. Here, the Hash Map is a class that is used to implement Map Interface. It stores its element in key-value pairs. The Key is an object that is used to fetch and receive value associated with it. It has access to all the methods of Map Interface, it does not have any additional methods of its own. Duplicate values are not allowed, although we can store null values and keys. In this article, we will explore the ... Read More
To get the synchronized Map from a TreeMap in Java, we can use an in-built method of Collection interface called ‘synchronizedMap()’. Here, TreeMap is a class that is used to implement NavigableMap Interface. It stores the elements of the map in a tree structure. It provides an efficient alternative to store the key-value pairs in sorted order. By default, a TreeMap is not synchronized. In this article, we will explain the need for synchronization and its practical implementation through example programs. Synchronized Map from a Tree Map A Tree Map is not thread-safe which means when we implement it in ... Read More
ArrayList is a class of Java Collection Framework that implements List Interface. It is a linear structure that stores and accesses each object in a sequential manner. It allows the storage of duplicate values. Always remember, each class of the collection framework can hold instances of wrapper classes or custom objects. They do not work with primitives. This article aims to explain how those objects hold by an ArrayList in Java. How ArrayList holds Objects ArrayList internally uses an array to store its elements. However, the size of the array is not fixed, it can increase and decrease as per ... Read More
Converting a Pandas DataFrame into a list is a common task in data analysis and manipulation using Python. The Pandas library provides powerful data structures and functionalities for handling tabular data, but there are situations where it becomes necessary to transform the DataFrame into a list format. By converting a DataFrame into a list, we gain flexibility in performing various operations or working with other Python data structures. In this article, we will explore different methods to convert a Pandas DataFrame into a list. We will discuss simple approaches like using the values attribute or the to_dict() method, as well ... Read More
IPython notebooks are a highly popular tool for scientific computing and data analysis, widely used by researchers, analysts, and programmers. By allowing users to integrate code, text, and interactive visualizations within a single document, they make it simple to explore data, develop models, and communicate findings. However, sharing IPython notebooks with others can be difficult, particularly when the recipients lack the necessary software or expertise to run them. A solution to this challenge is to convert IPython notebooks to PDF and HTML, which are universally supported and easily accessible on any device. In this article, we will delve into three ... Read More
Fractions and percentages are two fundamental mathematical concepts used in various fields such as finance, data analysis, and statistics. Converting fractions to percentages is a simple yet essential operation that allows us to represent fractional values in a more comprehensible manner. Python, being one of the most popular programming languages, provides several methods to convert fractions to percentages, and comprehending them is crucial for those working with data in Python. This article delves into the process of converting fractions to percentages in Python. We will explore different approaches to perform this operation and provide examples to help you understand each ... Read More
In Java, concurrent programming is a technique that allows multiple tasks or processes to run simultaneously on a single processor or multiple processors. It can improve the performance and responsiveness of applications. However, it also introduces new challenges and complexities to the Java developers, such as synchronization and deadlock. In this article, we will explore some of the different approaches to concurrent programming such as multithreading and executors. Concurrent Programming in Java The following three components of Java are used for Concurrent Programming java.lang.Thread clas java.lang.Runnable java.util.concurrent Multithreading It is a feature of the Java programming language that ... Read More
The most frequent query asked by beginner programmers, especially those who have already worked with C and C++ in the past, is whether Java supports pass-by-referenceor pass-by-value. Generally, programming languages use pass-by-value and pass-byreferencefor passing parameters to a method. However, Java does not support both approaches rather it uses pass-by-value to pass both primitive and reference type values. But, it provides a few ways to achieve pass-by-reference, we will explore those through this article. Ways to Achieve Paas By Reference Let’s start this discussion by understanding the storage mechanism of Java. The reference variables, names of methods and classes are ... Read More