IntBuffer as ReadOnlyBuffer() method in Java

A read-only int buffer can be created using the contents of a buffer with the method asReadOnlyBuffer() in the class java.nio.IntBuffer. The new buffer cannot have any modifications as it is a read-only buffer. However, the capacity, positions, limits etc. of the new buffer are the same as the previous buffer.

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 = 5;
      try {
         IntBuffer buffer = IntBuffer.allocate(5);
         System.out.println("The Original IntBuffer is: " + Arrays.toString(buffer.array()));
         IntBuffer roBuffer = buffer.asReadOnlyBuffer();
         System.out.println("The ReadOnlyBuffer IntBuffer is: ");
         while (roBuffer.hasRemaining()) System.out.print(roBuffer.get() + " ");
      } catch (IllegalArgumentException e) {
         System.out.println("Error!!! IllegalArgumentException");
      } catch (ReadOnlyBufferException e) {
         System.out.println("Error!!! ReadOnlyBufferException");

The output of the above program is as follows −


The Original IntBuffer is: [8, 1, 3, 7, 5]
The ReadOnlyBuffer IntBuffer is:
8 1 3 7 5
Samual Sam
Samual Sam

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