Java IO at a Glance

Java I/O Streams – Overview

File Copying
1. Semantics of File copying – FileInputStream and FileOutputStream
2. Skipping a few bytes in a file and reading
3. File copying – Using FileReader & FileWriter
4. Reading data types using DataInputStream and DataOutputStream
5. Merging of files – SequenceInputStream
6. Reading and writing sequentially and randomly – Using RandomAccessFile

Filter Streams – 1. FilterInputStream and FilterOutputStream 2. FilterReader and FilterWriter

Wrapper Streams: InputStreamReader and OutputStreamWriter

Keyboard Reading

1. Using DataInputStream
2. Using BufferedReader
3. Scanner – No parsing

Reading and writing to arrays and strings

1. Reading and writing into byte arrays: 1. ByteArrayInputStream 2.ByteArrayOutputStream
2. Reading and writing to char arrays: 1. CharArrayReader 2. CharArrayWriter
3. Reading strings using StringBufferInputStream: 1. StringReader 2. StringWriter

Special Programs

1. To find number of lines in a file
2. Adding line numbers to a file: 1. LineNumberInputStream 2. LineNumberReader
3. PrintStream vs PrintWriter
4. Byte streams vs Character streams
5. Rereading a file – Using markSupported(), mark() & reset()
6. Pushing out Character – PushbackReader
7. Piping data between two streams – 1. PipedInputStream and PipedOutputStream 2. PipedReader and PipedWriter
8. Retrieving metadata of a file – File class
9. Changing file properties – File class
10. Formatting Data – PrintWriter
11. Chaining or linking of streams
12. Closeable and Flushable interfaces
13. PrintStream
14. Tokenizing a stream – StreamTokenizer
15. Checking for tokens in file reading – using Scanner
16. What is System.out.println()?

Performance tips in file copying

1. Performance drawbacks in file copying
2. Peak performance with 1. BufferedInputStream and BufferedOutputStream 2. BufferedReader and BufferedWriter
3. Performance in file copying using DataInputStream and DataOutputStream