Buffer hasArray() methods in Java with Examples

// Java program to demonstrate
// hasArray() method

import java.nio.*;
import java.util.*;

public class GFG {
    public static void main(String[] args)
    {

        // Declaring the capacity of the ByteBuffer
        int capacity = 10;

        // Creating the ByteBuffer
        try {

            // creating object of bytebuffer
            // and allocating size capacity
            ByteBuffer bb = ByteBuffer.allocate(capacity);

            // putting the value in bytebuffer
            bb.put((byte)10);
            bb.put((byte)20);
            bb.rewind();

            // Typecast bytebuffer to Buffer
            Buffer buffer = (Buffer)bb;

            // checking buffer is backed by array or not
            boolean isArray = buffer.hasArray();

            // checking if else condition
            if (isArray)
                System.out.println("buffer is"
                                   + " backed by array");
            else
                System.out.println("buffer is"
                                   + " not backed by any array");
        }

        catch (IllegalArgumentException e) {
            System.out.println("IllegalArgumentException catched");
        }

        catch (ReadOnlyBufferException e) {
            System.out.println("ReadOnlyBufferException catched");
        }
    }
}

// Java program to demonstrate
// hasArray() method

import java.nio.*;
import java.util.*;

public class GFG {

    public static void main(String[] args)
    {

        // Declaring the capacity of the ByteBuffer
        int capacity = 10;

        // Creating the ByteBuffer
        try {

            // creating object of ByteBuffer
            // and allocating size capacity
            ByteBuffer bb = ByteBuffer.allocate(capacity);

            // putting the value in ByteBuffer
            bb.put((byte)8.56F);
            bb.put((byte)10);
            bb.rewind();

            // Creating a read-only copy of ByteBuffer
            // using asReadOnlyBuffer() method
            ByteBuffer bb1 = bb.asReadOnlyBuffer();

            // Typecast read-only ByteBuffer to read-only buffer
            Buffer buffer = (Buffer)bb1;

            // checking buffer is backed by array or not
            boolean isArray = buffer.hasArray();

            // checking if else condition
            if (isArray)
                System.out.println("buffer is"
                                   + " backed by array");
            else
                System.out.println("buffer is"
                                   + " not backed by any array");
        }

        catch (IllegalArgumentException e) {
            System.out.println("IllegalArgumentException catched");
        }

        catch (ReadOnlyBufferException e) {
            System.out.println("ReadOnlyBufferException catched");
        }
    }
}