For what reason should the EndOfStream property of a StreamReader object be checked before calling ReadLine?
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- As a precaution, before using ReadLine on a StreamReader object, you should examine its EndOfStream attribute.What's the big deal about calling ReadLine on a StreamReader object without first verifying its EndOfStream property?The ReadLine method of a StreamReader object shouldn't be called until the EndOfStream property has been checked.
- Assume inputFile references a StreamReader object that is associated with an open file. Which of the following loops is written in the correct general format to read all of the items from the file? Loop A: while (inputFile.EndOfStream) { // Read an item from the file. } Loop B: while (!inputFile.EndOfStream) { // Read an item from the file. }What does the StreamWriter object really consist of?As in Self-Test Exercise 5, write some code that will create a stream namedoutStream that is a member of the class PrintWriter, and that connects thisstream to a text file named sam so that your program can send output to the file.This time, however, do it in such a way that, if the file sam already exists, the oldcontents of sam will not be lost, and the program output will be written after theold contents of the file.
- Create a definition for the object that will be known as StreamWriter.Before using the ReadLine function on a StreamReader object, it's important to make sure the property's value isn't set to "true" (meaning the object has reached the end of its stream).The getSelectedFile method of a JFileChooser object returns a File object. What exactly is this File object? A string containing a file name, a disk file, something else?