Reader
In this chapter you will learn:
Use Reader class
Reader is the abstract class for reading character streams.
The following table lists the reader classes which deal with the character based stream.
ReaderAbstract class that describes character stream inputBufferedReaderBuffered input character streamCharArrayReaderInput stream that reads from a character arrayFileReaderInput stream that reads from a fileFilterReaderFiltered readerInputStreamReaderInput stream that translates bytes to charactersLineNumberReaderInput stream that counts linesPipedReaderInput pipePushbackReaderInput stream that allows characters to be returned to the input streamStringReaderInput stream that reads from a string
The Predefined Streams
System.out refers to the standard output stream. By default, this is the console.
System.in refers to standard input, which is the keyboard by default.
System.err refers to the standard error stream, which also is the console by default.
System.in is an object of type InputStream;
System.out and System.err are objects of type PrintStream.
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