Input and output using strings and string buffers

import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.InputStreamReader;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.PrintWriter;
import java.io.RandomAccessFile;
import java.io.Reader;
import java.io.StreamTokenizer;
import java.io.StringReader;
import java.io.StringWriter;
import java.io.Writer;

public class InputOutputDemoString {

  public static void main(String[] a) throws Exception {

    //Read from a String s as if it were a text file:
    Reader r = new StringReader("abc");
    System.out.println("abc: " + (char) r.read() + (char) r.read()
        + (char) r.read());
    //Write to a StringBuffer as if it were a text file:
    Writer sw = new StringWriter();
    sw.write('d');
    sw.write('e');
    sw.write('f');
    System.out.println(sw.toString());
  }
}

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7.	Reading Bytes from a DataInputStream
8.	Comparing Buffered and Unbuffered Writing Performance
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10.	Demonstrate ProgressMeterInputStream
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12.	Demonstrates standard I/O redirection
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15.	Mapping an entire file into memory for reading
16.	Mapped IO
17.	What happens when the entire file isn't in your mapping region
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19.	Locking portions of a mapped file
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Input and output using strings and string buffers : Input Output Stream « File Input Output « Java

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