Java wrapper classes provide a convenient and efficient way to work with primitive data types. They offer advantages such as encapsulation, type conversion, autoboxing and unboxing, utility methods, thread safety, and immutability.
MongoDB is a popular open-source NoSQL database system that uses a document-oriented data model to store and retrieve data. Here's an overview of MongoDB: Document-Oriented : MongoDB stores data in flexible, JSON-like documents, where fields can vary from document to document. This document-oriented approach allows for easier mapping to application objects and supports dynamic schema design. Scalable : MongoDB is designed to scale out horizontally across multiple servers, making it suitable for handling large volumes of data and high-traffic applications. It supports sharding, which partitions data across multiple machines, and replication, which provides redundancy and fault tolerance. High Performance : MongoDB offers high-performance read and write operations by using in-memory caching, asynchronous replication, and efficient indexing. It also provides features like aggregation pipelines and secondary indexes to optimize query performance. Schema Flexibility : Unlike tradition...
Git is distributed version control system which is free and open source software (FOSS). It is a tool to track the changes in the code. We save an initial version of code in the git and then update over the time. We can look back all the changes done so far. Github is the website to host the repositories online. Once we have made changes local repository on the computer and ready to put in git, we need to tell git to track them through add command, save file through commit command and then upload the changes to remote repository using push command. Thus we can keep track the version history and also isolate the changes. SSH (Secure SHell protocol is used for authentication and it is secure and convenient way to log into remote servers) keys need to be generated which consists of pair of keys, private and public keys. Public key is shared with the world via GitHub while the private key is kept secured on one's computer. When we try to connect with GitHub, SSH client provides priv...
JAXB (Java Architecture for XML Binding) is a Java API that allows Java developers to map Java classes to XML representations and vice versa. It provides a convenient way to serialize Java objects into XML and deserialize XML documents into Java objects. Here are some key features of JAXB: Automatic Mapping : JAXB eliminates the need for manual parsing and generation of XML documents by automatically mapping Java classes to XML schema (XSD) definitions and vice versa. It simplifies the process of converting between Java objects and XML documents. Annotation-Based Mapping : JAXB uses annotations like @XmlRootElement , @XmlElement , @XmlAttribute , and @XmlType to define the mapping between Java classes and XML elements/attributes. These annotations provide fine-grained control over the XML representation of Java objects. Marshalling and Unmarshalling : JAXB provides APIs for marshalling (converting Java objects to XML) and unmarshalling (converting XML to Java objects). Developer...
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