Reading Data from a File

5. Constructors

Answer:
Yes. All this object creation (and the garbage collector running in the background) takes processor time, but for most programs this is not noticeable.

Constructors

The constructor for BufferedReader looks like this:

BufferedReader( Reader in )

The constructor for FileReader looks like this:

FileReader( String fileName ) throws FileNotFoundException

The methods from BufferedReader which interest us are:

void close() throws IOException       // close the stream

int read() throws IOException         // read a single character into an int

String readLine() throws IOException  // read one line of characters into a String.

The read() method will be discussed later. (Both classes have other constructors and other methods which will not be discussed here).

Question 5:
What does the close() method do with an input stream?