Java is a high-level programming language developed by Sun Microsystems.Java is an object-oriented language similar to C++ and it is a general purpose programming language with a number of features that make the language well suited for use on the World Wide Web

Java is a object oriented programming language that is concurrent, reliable,secure and platform independent. It is intended to let application developers "write once, run anywhere" (WORA), meaning that code that runs on one platform does not need to be recompiled to run on another. Java applications are typically compiled to byte code (class file) that can run on any Java virtual machine (JVM) regardless of computer architecture. Java supports multithreaded programming which allows a programmer to write a program that can perform many tasks simultaneously

Additionally java also uses the code reusability feature which enables to upgrade the existing application without rewriting the entire code of the application. The java packages are used to enable the reusability of classes and methods across various applications.The files and I/O streams are used to store and retrieve the information from a text file. Apart from that java also deals with accessing and querying a database using JDBC