ByteBuffer asLongBuffer() method in Java

Java 8Object Oriented ProgrammingProgramming

A view of the ByteBuffer can be created as a LongBuffer using the asLongBuffer() method in the class java.nio.ByteBuffer. This method requires no parameters and it returns a long buffer as required. This buffer reflects the changes made to the original buffer and vice versa.

A program that demonstrates this is given as follows −


 Live Demo

import java.nio.*;
import java.util.*;
public class Demo {
   public static void main(String[] args) {
      int n = 50;
      try {
         ByteBuffer bufferB = ByteBuffer.allocate(n);
         LongBuffer bufferL = bufferB.asLongBuffer();
         long l;
         System.out.print("The LongBuffer is: ");
         while ((l = bufferL.get()) != 0) {
            System.out.print(l + " ");
      } catch (IllegalArgumentException e) {
         System.out.println("Error!!! IllegalArgumentException");
      } catch (ReadOnlyBufferException e) {
         System.out.println("Error!!! ReadOnlyBufferException");


The LongBuffer is: 5000 9000 2000 8000 3000
Updated on 30-Jul-2019 22:30:25