OCP Oracle Certified Professional Java SE 11 Developer Complete Study Guide

Chapter 19I/O

OCP EXAM OBJECTIVES COVERED IN THIS CHAPTER:

• I/O (Fundamentals and NIO2)
  • Read data from and write console and file data using I/O Streams
  • Use I/O Streams to read and write files
  • Read and write objects by using serialization

What can Java applications do outside the scope of managing objects and attributes in memory? How can they save data so that information is not lost every time the program is terminated? They use files, of course! You can design code that writes the current state of an application to a file every time the application is closed and then reloads the data when the application is executed the next time. In this manner, information is preserved between program executions.

This chapter focuses on using ...