Creates a view of this byte buffer as a double buffer.

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Creates a view of this byte buffer as a double buffer.
Posted on: July 27, 2010 at 12:00 AM

In this tutorial you will see how to creates a view of this byte buffer as a double buffer.

Creates a view of this byte buffer as a double buffer.

In this tutorial, we will see how to creates a view of byte buffer as a double buffer.

ByteBuffer API:

The java.nio.ByteBuffer class extends java.nio.Buffer class. It provides the following methods:

Return type	Method	Description
static ByteBuffer	allocate(int capacity)	The allocate(...)method allocate a new byte buffer.
abstract Doublebuffer	asDoubleBuffer()	The asDoubleBuffer() method creates a view of byte buffer as a double buffer.
int	limit()	The limit() method returns the limit of associated buffer.
int	position()	The position() method returns the position of associated buffer.
final int	capacity()	The capacity() method returns the capacity of associated buffer.

code


import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.nio.ByteBuffer;

import java.nio.DoubleBuffer;

public class AsDouble {

  public static void main(String[] args) {

    File fileName = new File("bharat.txt");

    FileOutputStream outStream = null;

    try {

      outStream = new FileOutputStream(fileName, true);

    } catch (FileNotFoundException e) {

      System.out.println("File not found Error.");

    }

    ByteBuffer byteBuf = ByteBuffer.allocate(256);

    System.out.println("\nInformation related to byte buffer :");

    System.out

    .printf(

"ByteBuffer Limit =%4d ByteBuffer position =%2d  
ByteBuffer capacity =%4d%n",

        byteBuf.limit(), byteBuf.position(), byteBuf.capacity());

    DoubleBuffer doubleBuf = byteBuf.asDoubleBuffer();

    System.out.println("Information related to double buffer :");

    System.out

    .printf(

   "DoubleBuffer Limit = %4d DoubleBuffer position =%2d


    DoubleBuffer capacity =%4d%n",

         doubleBuf.limit(),doubleBuf.position(),doubleBuf.capacity());

    try {

      outStream.close();

    } catch (IOException ioe) {

      System.out.println("IOException is " + ioe);

    }

  }

}

Output

C:\>java AsDouble
Information related to byte buffer :
ByteBuffer Limit = 256 ByteBuffer position = 0 ByteBuffer capacity = 256
Information related to double buffer :
DoubleBuffer Limit = 32 DoubleBuffer position = 0 DoubleBuffer capacity = 32

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