ShortBuffer array() Method in Java with Examples

The array() method of java.nio.ShortBuffer is used to return the short array that backs this buffer(optional). Modifications to this buffer’s content will cause the returned array’s content to be modified, and vice versa. Invoke the hasArray method before invoking this method in order to ensure that this buffer has an accessible backing array. Syntax:

public final short[] array()

Parameters: The method does not take any parameters. Return Value: The method returns the array that backs the buffer. Exception:

• ReadOnlyBufferException, If the buffer is backed by an array but is read-only
• UnsupportedOperationException, If this buffer is not backed by an accessible array

< Below programs illustrate the use of array() method: Program 1: 

Java

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

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

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

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

        // Creating the ShortBuffer
        try {

            // creating object of Shortbuffer
            // and allocating size capacity
            ShortBuffer sb = ShortBuffer.allocate(capacity);

            // putting the value in Shortbuffer
            sb.put((short)856);
            sb.put(2, (short)9);
            sb.rewind();

            // getting array from sb ShortBuffer using array() method
            short[] sbb = sb.array();

            // printing the ShortBuffer sb
            System.out.println("ShortBuffer: "
                               + Arrays.toString(sbb));
        }

        catch (IllegalArgumentException e) {

            System.out.println("IllegalArgumentException catched");
        }

        catch (ReadOnlyBufferException e) {

            System.out.println("ReadOnlyBufferException catched");
        }
    }
}

Output:

ShortBuffer: [856, 0, 9, 0, 0, 0, 0, 0, 0, 0]

Program 2: To show ReadOnlyBufferException 

Java

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

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

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

        // Declaring the capacity of the sb
        int capacity1 = 10;

        // Declaring the capacity of the sb1
        int capacity2 = 5;

        // Creating the ShortBuffer
        try {
            //
            // sb
            //
            // creating object of Shortbuffer sb
            // and allocating size capacity
            ShortBuffer sb = ShortBuffer.allocate(capacity1);

            // putting the value in sb
            sb.put((short)96);
            sb.put(2, (short)7);
            sb.put(3, (short)41);
            sb.rewind();

            // print the ShortBuffer
            System.out.println("ShortBuffer sb: "
                               + Arrays.toString(sb.array()));

            //
            // sb1
            //
            // creating object of Shortbuffer sb1
            // and allocating size capacity
            ShortBuffer sb1 = ShortBuffer.allocate(capacity2);

            // putting the value in sb1
            sb1.put(1, (short)445);
            sb1.put(2, (short)64);
            sb1.rewind();

            // print the ShortBuffer
            System.out.println("\nShortBuffer sb1: "
                               + Arrays.toString(sb1.array()));

            // Creating a read-only copy of ShortBuffer
            // using asReadOnlyBuffer() method
            ShortBuffer readOnlysb = sb.asReadOnlyBuffer();

            // print the ShortBuffer
            System.out.print("\nReadOnlyBuffer ShortBuffer: ");

            while (readOnlysb.hasRemaining())
                System.out.print(readOnlysb.get() + ", ");

            // try to change readOnlysb
            System.out.println("\n\nTrying to get the array"
                               + " from ReadOnlysb for editing");

            short[] sbarr = readOnlysb.array();
        }
        catch (IllegalArgumentException e) {
            System.out.println("IllegalArgumentException catched");
        }
        catch (ReadOnlyBufferException e) {
            System.out.println("Exception thrown: " + e);
        }
    }
}

Output:

ShortBuffer sb: [96, 0, 7, 41, 0, 0, 0, 0, 0, 0]

ShortBuffer sb1: [0, 445, 64, 0, 0]

ReadOnlyBuffer ShortBuffer: 96, 0, 7, 41, 0, 0, 0, 0, 0, 0, 

Trying to get the array from ReadOnlysb for editing
Exception thrown: java.nio.ReadOnlyBufferException