Trail: Essential Classes
Lesson: Basic I/O
Questions and Exercises
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Questions and Exercises: Basic I/O

Questions

1. What class and method would you use to read a few pieces of data that are at known positions near the end of a large file?

2. When invoking format, what is the best way to indicate a new line?

3. How would you determine the MIME type of a file?

4. What method(s) would you use to determine whether a file is a symbolic link?

Exercises

1. Write an example that counts the number of times a particular character, such as e, appears in a file. The character can be specified at the command line. You can use xanadu.txt as the input file.

2. The file datafile begins with a single long that tells you the offset of a single int piece of data within the same file. Write a program that gets the int piece of data. What is the int data?

Check your answers.


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