File I/O and parsing

Question 1

1. In general what is a FileReader and how does it work?
2. What is the code to use it?

Answer 1

1. FileReader is meant for reading streams of characters. It reads input from a file, character by character.
2. FileReader <yourvarname> = new FileReader("<yourfilename>");
   </yourfilename></yourvarname><ul>
   <li>note that this needs to be wrape in a try/catch as it throws a FileNotFoundException</li>
   </ul></yourfilename></yourvarname>

Question 2

1. In general what is a BufferedReader and how does it work?
2. What is the code to use it?

Answer 2

1. BufferedReader reads text from a character-input stream, buffering characters so as to provide for the efficient reading of characters, arrays, and lines. In general, each read request made of a Reader causes a corresponding read request to be made of the underlying character or byte stream.
2. BufferedReader <yourvarname> = new BufferedReader(<afilereader>);</afilereader></yourvarname>

Question 3

What are BufferedReader’s methods and briefly, what do they do?

Answer 3

1. read( ) - reads a single character
2. readLine( ) - reads a line of text
3. close( ) - closes the stream and releases any resources

Question 4

What is the specific code to open a text file and read and print the file, line by line?

Answer 4

Question 5

How do you parse a string of words into individual words?

Answer 5

String[] parsed = new String[5];

parsed = line.split(“ “);