Java in 21 Days (8th Edition) Day 16: Working with Input and Output

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Notes and Corrections

View the Certification Practice quiz solution
Certification answer: Answer (a) is correct. The input stream represented by the System.in variable can be used like any other input stream. You can use it to create a reader object or a stream object and then read the data from the stream accordingly.
Answers (b), (c), and (d) are incorrect.

Source Files

Activities

Solution 1: HexReader2.java and hexfile.txt.
Solution 2: FileWiper.java and junkfile.dat.