The asReadOnlyBuffer() method of java.nio.ByteBuffer class is used to create a new, read-only byte buffer that shares this buffer’s content.
The content of the new buffer will be that of this buffer. Changes to this buffer’s content will be visible in the new buffer; the new buffer itself, however, will be read-only and will not allow the shared content to be modified. The two buffers’ position, limit, and mark values will be independent.
The new buffer’s capacity, limit, position, and mark values will be identical to those of this buffer.
If this buffer is itself read-only then this method behaves in exactly the same way as the duplicate method.
public abstract ByteBuffer asReadOnlyBuffer()
Return Value: This method returns the new, read-only byte buffer with the same content as that of this buffer.
Below are the examples to illustrate the asReadOnlyBuffer() method:
Original ByteBuffer: [20, 30, 40, 50] ReadOnlyBuffer ByteBuffer: 20, 30, 40, 50,
Original ByteBuffer: [20, 30, 40, 50] ReadOnlyBuffer ByteBuffer: 20, 30, 40, 50, Trying to get the array from bb1 for editing Exception thrown : java.nio.ReadOnlyBufferException
Attention reader! Don’t stop learning now. Get hold of all the important Java Foundation and Collections concepts with the Fundamentals of Java and Java Collections Course at a student-friendly price and become industry ready. To complete your preparation from learning a language to DS Algo and many more, please refer Complete Interview Preparation Course.