ByteBuffer getShort() method in Java with Examples

getShort()

The getShort() method of java.nio.ByteBuffer class is used to read the next two bytes at this buffer’s current position, composing them into a short value according to the current byte order, and then increments the position by two.

Syntax:

public abstract short getShort()

Return Value: This method returns the short value at the buffer’s current position.

Throws: This method throws BufferUnderflowException if there are fewer than four bytes remaining in this buffer.

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

Examples 1:

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

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

public class GFG {

    public static void main(String[] args)
    {

        // Declaring the capacity of the ByteBuffer
        int capacity = 6;

        // Creating the ByteBuffer
        try {

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

            // putting the short value in the bytebuffer
            bb.asShortBuffer()
                .put((short)1034)
                .put((short)1035)
                .put((short)1036);

            // rewind the Bytebuffer
            bb.rewind();

            // print the ByteBuffer
            System.out.println("Original ByteBuffer: ");
            for (int i = 1; i <= capacity / 2; i++)
                System.out.print(bb.getShort() + " ");

            // rewind the Bytebuffer
            bb.rewind();

            // Reads the long at this buffer's current position
            // using getShort() method
            long value = bb.getShort();

            // print the long value
            System.out.println("\n\nByte Value: " + value);

            // Reads the short at this buffer's next position
            // using getShort() method
            long value1 = bb.getShort();

            // print the short value
            System.out.print("\nNext Byte Value: " + value1);
        }

        catch (BufferUnderflowException e) {

            System.out.println("\nException Thrown : " + e);
        }
    }
}

Output:

Original ByteBuffer: 
1034 1035 1036 

Byte Value: 1034

Next Byte Value: 1035

Examples 2:

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

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

public class GFG {

    public static void main(String[] args)
    {

        // Declaring the capacity of the ByteBuffer
        int capacity = 4;

        // Creating the ByteBuffer
        try {

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

            // putting the short value in the bytebuffer
            bb.asShortBuffer()
                .put((short)1034)
                .put((short)1036);

            // rewind the Bytebuffer
            bb.rewind();

            // print the ByteBuffer
            System.out.println("Original ByteBuffer: ");
            for (int i = 1; i <= capacity / 2; i++)
                System.out.print(bb.getShort() + " ");

            // rewind the Bytebuffer
            bb.rewind();

            // Reads the long at this buffer's current position
            // using getShort() method
            long value = bb.getShort();

            // print the long value
            System.out.println("\n\nByte Value: " + value);

            // Reads the short at this buffer's next position
            // using getShort() method
            long value1 = bb.getShort();

            // print the short value
            System.out.print("\nNext Byte Value: " + value1);

            // Reads the short at this buffer's next position
            // using getShort() method
            long value2 = bb.getShort();
        }

        catch (BufferUnderflowException e) {
            System.out.println("\nthere are fewer than"
                               + " two bytes remaining in this buffer");
            System.out.println("Exception Thrown : " + e);
        }
    }
}

Output:

Original ByteBuffer: 
1034 1036 

Byte Value: 1034

Next Byte Value: 1036
there are fewer than two bytes remaining in this buffer
Exception Thrown : java.nio.BufferUnderflowException

Reference: https://docs.oracle.com/javase/9/docs/api/java/nio/ByteBuffer.html#getShort–

getLong(int index)

The getLong(int index) method of ByteBuffer is used to read four bytes at the given index, composing them into a float value according to the current byte order.

Syntax:

public abstract long getLong(int index)

Parameters: This method takes index (The index from which the Byte will be read) as a parameter.

Return Value: This method returns the long value at the given index.

Exception: This method throws IndexOutOfBoundsException. If index is negative or not smaller than the buffer’s limit this exception is thrown.

Below are the examples to illustrate the getLong(int index) method:

Examples 1:

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

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

public class GFG {

    public static void main(String[] args)
    {

        // Declaring the capacity of the ByteBuffer
        int capacity = 4;

        // Creating the ByteBuffer
        try {

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

            // putting the short value in the bytebuffer
            bb.asShortBuffer()
                .put((short)1034)
                .put((short)1036);

            // rewind the Bytebuffer
            bb.rewind();

            // print the ByteBuffer
            System.out.println("Original ByteBuffer: ");
            for (int i = 1; i <= capacity / 2; i++)
                System.out.print(bb.getShort() + " ");

            // rewind the Bytebuffer
            bb.rewind();

            // Reads the long at this buffer's current position
            // using getShort() method
            long value = bb.getShort(0);

            // print the long value
            System.out.println("\n\nByte Value: " + value);

            // Reads the short at this buffer's next position
            // using getShort() method
            long value1 = bb.getShort(2);

            // print the short value
            System.out.print("\nNext Byte Value: " + value1);
        }

        catch (IndexOutOfBoundsException e) {

            System.out.println("\nindex is negative or "
                               + "smaller than the buffer's limit, "
                               + " minus seven");
            System.out.println("Exception Thrown : " + e);
        }
    }
}

Output:

Original ByteBuffer: 
1034 1036 

Byte Value: 1034

Next Byte Value: 1036

Examples 2:

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

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

public class GFG {

    public static void main(String[] args)
    {

        // Declaring the capacity of the ByteBuffer
        int capacity = 4;

        // Creating the ByteBuffer
        try {

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

            // putting the short value in the bytebuffer
            bb.asShortBuffer()
                .put((short)1034)
                .put((short)1036);

            // rewind the Bytebuffer
            bb.rewind();

            // print the ByteBuffer
            System.out.println("Original ByteBuffer: ");
            for (int i = 1; i <= capacity / 2; i++)
                System.out.print(bb.getShort() + " ");

            // rewind the Bytebuffer
            bb.rewind();

            // Reads the long at this buffer's current position
            // using getShort() method
            long value = bb.getShort(0);

            // print the long value
            System.out.println("\n\nByte Value: " + value);

            // Reads the short at this buffer's next position
            // using getShort() method
            long value1 = bb.getShort(3);

            // print the short value
            System.out.print("\nNext Byte Value: " + value1);
        }

        catch (IndexOutOfBoundsException e) {

            System.out.println("\nindex is negative or smaller "
                               + "than the buffer's limit, "
                               + "minus one");
            System.out.println("Exception Thrown : " + e);
        }
    }
}

Output:

Original ByteBuffer: 
1034 1036 

Byte Value: 1034

index is negative or smaller than the buffer's limit, minus one
Exception Thrown : java.lang.IndexOutOfBoundsException

Reference: https://docs.oracle.com/javase/9/docs/api/java/nio/ByteBuffer.html#getShort-int-