CharBuffer arrayOffset() method in Java

Java 8ProgrammingObject Oriented Programming

The offset of the first element of the buffer inside the buffer array is obtained using the method arrayOffset() in the class java.nio.CharBuffer. If the buffer backed by the array is read-only, then the ReadOnlyBufferException is thrown.

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 {
         CharBuffer buffer = CharBuffer.allocate(5);
         System.out.println("The CharBuffer is: " + Arrays.toString(buffer.array()));
         System.out.println("The arrayOffset is: " + buffer.arrayOffset());
      } catch (IllegalArgumentException e) {
         System.out.println("Error!!! IllegalArgumentException");
      } catch (ReadOnlyBufferException e) {
         System.out.println("Error!!! ReadOnlyBufferException");


The CharBuffer is: [A, P, P, L, E]
The arrayOffset is: 0
Updated on 30-Jul-2019 22:30:25