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 −

Example

 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);
         buffer.put('A');
         buffer.put('P');
         buffer.put('P');
         buffer.put('L');
         buffer.put('E');
         buffer.rewind();
         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");
      }
   }
}

Output

The CharBuffer is: [A, P, P, L, E]
The arrayOffset is: 0
raja
Published on 12-Mar-2019 08:14:50
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