Java is the most popular programming language for application development. Java Input-Output is almost inevitable and essential in Java Programming tasks. When developing a java application, it is necessary to interact with hardware devices for input and output requirements. To do that java program makes use of API in io. the package which has a class for each device. Java IO is an API deal with core classes that comes with reading and writing data from the networks. Java IO consists of many subclasses for file access, buffering, network access, filtering, intercommunication, pipes, reading, and writing text. Java IO has two types of streams namely input streams and output streams. They are programming interfaces to the streams. Two general-purpose classes file input stream and file output stream used to copy a file to file. It also has some classes for the file to represent a file, random access files, Tokenizer. file handling in Java is performed by Java IO API. when a user request to process a read a file, a file system determines where the file lives in the drive then it places them in the memory. While talking about Output stream class there are useful methods of output stream respectively with a hierarchy and similar to this is Input streams java io package has object input and object output respectively. To handle character data sets character streams are used. This course covers Java platforms class used for I/O operations and mapped with machine level. You will be able to perform some input/output operations in Java applications. good familiarity in designing user interfaces and collections of learners learn how to write code for Java applications. Creating design application UI and building calculator applications using java IO. You will implement interfaces and access internal properties using Java IO. This training gives you complete knowledge on java architectures and how to develop a code in networking concepts where a stream plays a vital role.