What happens when the entire file isn't in your mapping region : Input Output Stream « File Input Output « Java

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Java » File Input Output » Input Output StreamScreenshots 
What happens when the entire file isn't in your mapping region

// : c12:MappedReader.java
// What happens when the entire file
// isn't in your mapping region?
// {ThrowsException}
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.

import java.io.FileInputStream;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;

public class MappedReader {
  private static final int LENGTH = 100// Small

  public static void main(String[] argsthrows Exception {
    if (args.length != 1) {
      System.out.println("argument: sourcefile");
      System.exit(1);
    }
    MappedByteBuffer in = new FileInputStream(args[0]).getChannel().map(
        FileChannel.MapMode.READ_ONLY, 0, LENGTH);
    int i = 0;
    while (i < LENGTH)
      System.out.print((charin.get(i++));
    System.out.println((charin.get(i++));
  }
///:~



           
       
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