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How to create a long buffer with the help of byte buffer.
Posted on: August 5, 2010 at 12:00 AM
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In this tutorial, you will see how to create a long buffer with the help of byte buffer.

How to create a long buffer with the help of byte buffer.

 In this tutorial, we will see how to create a long buffer with the help of byte 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 byte buffer of given capacity. 
abstrtact LongBuffer  asIntBuffer() The asIntBuffer() method returns  long buffer based in byte buffer.

Buffer API:

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

Return type Method Description
int limit() The limit() method returns the limit of  long buffer.
int position() The position() method returns the position of long buffer.
final int capacity() The capacity() method returns the capacity of associated long buffer.

Code

import java.nio.*;
import java.nio.LongBuffer;
import java.nio.ByteBuffer;

public class LongByByteBuffer {
  public static void main(String[] args){    
    ByteBuffer byteBuf=ByteBuffer.allocate(1024);
    LongBuffer longBuf =byteBuf.asLongBuffer();
    long[] array = new long[] {6545555787867};
    longBuf.put(array);
    longBuf.flip();
    System.out.println("Content in long buffer.");
    while (longBuf.hasRemaining()) {
      System.out.println(longBuf.get());
    }
System.out.println("Capacity of LongBuffer : " + longBuf.capacity());
System.out.println("Limit of LongBuffer : " + longBuf.limit());
System.out.println("Position of LongBuffer : " + longBuf.position());
  }
}

Output

C:\>java LongByByteBuffer
Content in long buffer.
6545555
787867
Capacity of LongBuffer : 128
Limit of LongBuffer : 2
Position of LongBuffer : 2

Download this code

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Posted on: August 5, 2010

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