In this tutorial, you will see how to create a read-only long buffer in java.

How to create a read-only long buffer in java.

In this tutorial, we will see how to create a read-only long buffer that shares the content of another long buffer.

LongBuffer API :        

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

Return type	Method	Description
static LongBuffer	allocate( int capacity)	The allocate(..) method allocate a new long buffer.
abstract LongBuffer	asReadOnlyBuffer()	The asReadOnlyBuffer() method create a new read-only buffer that share the content of given long buffer.

Code

import java.nio.*; import java.nio.LongBuffer; public class ReadOnlyBuffer {   public static void main(String[] args){     LongBuffer longBuf = LongBuffer.allocate(256);     longBuf.put(345678);     longBuf.put(8765433);     longBuf.flip();     System.out.println("Content in long buffer.");     while (longBuf.hasRemaining()) {       System.out.println(longBuf.get());     }     System.out.println("Content in new long buffer.");     longBuf.flip();     LongBuffer newLBuffer = longBuf.asReadOnlyBuffer();     for (int i = 0; i < newLBuffer.limit(); i++) {       System.out.println(newLBuffer.get());     }     if (newLBuffer.isReadOnly()) {       System.out.println("New buffer is read only");     } else {       System.out.println("New buffer is not read only.");     }   } }

Output

C:\>Java ReadOnlyBuffer Content in long buffer. 345678 8765433 Content in new long buffer. 345678 8765433 New buffer is read only

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