ShortBuffer rewind() method in Java with Examples

The rewind() method of java.nio.ShortBuffer Class is used to rewind this buffer. By rewinding this Buffer, the following actions are taken:

• Current position is set to zero
• the mark is discarded, if any, but the mark value is unchanged.

Syntax:

public ShortBuffer rewind()

Parameter: This method do not accept any parameter.

Return Value: This method returns this buffer.

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

Examples 1:

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

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

public class GFG {
    public static void main(String[] args)
    {
        // defining and allocating ShortBuffer
        // using allocate() method
        ShortBuffer shortBuffer
            = ShortBuffer.allocate(4);

        // put short value in shortBuffer
        // using put() method
        shortBuffer.put((short)10);
        shortBuffer.put((short)20);

        // print the short buffer
        System.out.println(
            "Buffer before operation: "
            + Arrays.toString(
                  shortBuffer.array())
            + "\nPosition: "
            + shortBuffer.position()
            + "\nLimit: "
            + shortBuffer.limit());

        // rewind the Buffer
        // using rewind() method
        shortBuffer.rewind();

        // print the shortbuffer
        System.out.println(
            "\nBuffer after operation: "
            + Arrays.toString(
                  shortBuffer.array())
            + "\nPosition: "
            + shortBuffer.position()
            + "\nLimit: "
            + shortBuffer.limit());
    }
}

Output:

Buffer before operation: [10, 20, 0, 0]
Position: 2
Limit: 4

Buffer after operation: [10, 20, 0, 0]
Position: 0
Limit: 4

Examples 2:

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

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

public class GFG {
    public static void main(String[] args)
    {
        // defining and allocating ShortBuffer
        // using allocate() method
        ShortBuffer shortBuffer
            = ShortBuffer.allocate(5);

        // put short value in shortBuffer
        // using put() method
        shortBuffer.put((short)10);
        shortBuffer.put((short)20);
        shortBuffer.put((short)30);

        // mark will be going to discarded by rewind()
        shortBuffer.mark();

        // print the buffer
        System.out.println(
            "Buffer before operation: "
            + Arrays.toString(
                  shortBuffer.array())
            + "\nPosition: "
            + shortBuffer.position()
            + "\nLimit: "
            + shortBuffer.limit());

        // Rewind the Buffer
        // using rewind() method
        shortBuffer.rewind();

        // print the buffer
        System.out.println(
            "\nBuffer after operation: "
            + Arrays.toString(
                  shortBuffer.array())
            + "\nPosition: "
            + shortBuffer.position()
            + "\nLimit: "
            + shortBuffer.limit());
    }
}

Output:

Buffer before operation: [10, 20, 30, 0, 0]
Position: 3
Limit: 5

Buffer after operation: [10, 20, 30, 0, 0]
Position: 0
Limit: 5

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