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ByteBuffer asShortBuffer() method in Java with Examples
  • Last Updated : 20 Sep, 2018
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The asShortBuffer() method of java.nio.ByteBuffer class is used to create a view of this byte buffer as a short buffer.

The content of the new buffer will start at this buffer’s current position. Changes to this buffer’s content will be visible in the new buffer, and vice versa; the two buffers’ position, limit, and mark values will be independent.

The new buffer’s position will be zero, its capacity and its limit will be the number of bytes remaining in this buffer divided by two, and its mark will be undefined. The new buffer will be direct if, and only if, this buffer is direct, and it will be read-only if, and only if, this buffer is read-only.

Syntax:

public abstract ShortBuffer asShortBuffer()

Return Value: This method returns a new short buffer.



Below are the examples to illustrate the asShortBuffer() method:

Examples 1:




// Java program to demonstrate
// asShortBuffer() method
// for ByteBuffer
  
import java.nio.*;
import java.util.*;
  
public class GFG {
  
    public static void main(String[] args)
    {
  
        // Declaring the capacity  of the ByteBuffer
        int capacity = 50;
  
        // Creating the ByteBuffer
        try {
  
            // creating object of  ByteBuffer
            // and allocating size capacity
            ByteBuffer bb = ByteBuffer.allocate(capacity);
  
            // changeing  bytebuffer into
            // ShortBuffer
            ShortBuffer cb = bb.asShortBuffer();
  
            // putting the value in ShortBuffer
            cb.put((short)20);
            cb.put((short)30);
            cb.put((short)40);
            cb.put((short)50);
            cb.rewind();
  
            // Declaring variable c
            short c;
  
            // print the ByteBuffer
            System.out.print("ShortBuffer : ");
            while ((c = cb.get()) != 0)
                System.out.print(c + "  ");
        }
  
        catch (IllegalArgumentException e) {
  
            System.out.println("Exception thrown : " + e);
        }
  
        catch (ReadOnlyBufferException e) {
  
            System.out.println("Exception thrown : " + e);
        }
    }
}
Output:
ShortBuffer : 20  30  40  50

Examples 2:




// Java program to demonstrate
// asShortBuffer() method
// for ByteBuffer
  
import java.nio.*;
import java.util.*;
  
public class GFG {
  
    public static void main(String[] args)
    {
  
        // Declaring the capacity  of the ByteBuffer
        int capacity = 50;
  
        // Creating the ByteBuffer
        try {
  
            // creating object of  ByteBuffer
            // and allocating size capacity
            ByteBuffer bb = ByteBuffer.allocate(capacity);
  
            // changeing  bytebuffer into
            // ShortBuffer
            IntBuffer cb = bb.asIntBuffer();
  
            // putting the int to short typecast value in ShortBuffer
            cb.put((short)10);
            cb.put((short)20);
            cb.put((short)30);
            cb.rewind();
  
            // Declaring variable c
            int c;
  
            // print the ByteBuffer
            System.out.print("ShortBuffer : ");
            while ((c = cb.get()) != 0)
                System.out.print(c + "  ");
  
            // Creating a read-only copy of ByteBuffer
            // using asReadOnlyBuffer() method
            ByteBuffer bb1 = bb.asReadOnlyBuffer();
  
            // changeing read-only bytebuffer into
            // read-only ShortBuffer
            ShortBuffer cb1 = bb1.asShortBuffer();
  
            // putting the int to short typecast value in read-only ShortBuffer
            System.out.println("\n\nTrying to put the value "
                               + "in read only ShortBuffer");
            cb1.put((short)10);
            cb1.put((short)20);
            cb1.put((short)30);
            cb1.rewind();
        }
  
        catch (IllegalArgumentException e) {
  
            System.out.println("Exception thrown : " + e);
        }
  
        catch (ReadOnlyBufferException e) {
  
            System.out.println("Exception thrown : " + e);
        }
    }
}
Output:
ShortBuffer : 10  20  30  

Trying to put the value in read only ShortBuffer
Exception thrown : java.nio.ReadOnlyBufferException

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