Home Tutorial Java Corejava Nio Creates a view of  byte buffer as a float buffer.

 
 

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Creates a view of  byte buffer as a float buffer.
Posted on: July 27, 2010 at 12:00 AM
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In this tutorial you will see how to creates a view of  byte buffer as a float buffer.

Creates a view of  byte buffer as a float buffer.

 In this tutorial, we will see how to creates a view of byte buffer as a float 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 FloatBuffer asFloatBuffer() The asFloatBuffer() method creates a view of byte buffer as a float 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.FloatBuffer;

public class AsCharBuffer {
  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());
    FloatBuffer floatBuf = byteBuf.asFloatBuffer();
    System.out.println("Information related to float buffer :");
    System.out
    .printf(
        "FloatBuffer Limit = %4d FloatBuffer position = %2d 

FloatBuffer capacity = %4d%n",
        floatBuf.limit(), floatBuf.position(), floatBuf.capacity());
    try {
      outStream.close();
    catch (IOException ioe) {
      System.out.println("IOException is " + ioe);
    }
  }
}

Output

C:\>java AsFloat
Information related to byte buffer :
ByteBuffer Limit = 256 ByteBuffer position = 0 ByteBuffer capacity = 256
Information related to float buffer :
FloatBuffer Limit = 64 FloatBuffer position = 0 FloatBuffer capacity = 64

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Posted on: July 27, 2010

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