IntBuffer flip() method in Java with Examples

The flip() method of java.nio.IntBuffer Class is used to flip this buffer. By flipping this buffer, it meant that the buffer will be trimmed to the current position and then the position will be changed to zero. During this process, if any mark is there on the buffer, then that mark will be automatically discarded. 

Syntax:

public final IntBuffer flip()

Parameter: The method do not take any parameter. 

Return Value: This method returns the flipped IntBuffer instance. 

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

Examples 1:

Java

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

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

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

        // Declare and initialize
        // the int array
        int[] ib
            = { 10, 20, 30 };

        // wrap the int array
        // into IntBuffer
        // using wrap() method
        IntBuffer intBuffer
            = IntBuffer.wrap(ib);

        // set position at index 1
        intBuffer.position(1);

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

        // Flip the Buffer
        // using flip() method
        intBuffer.flip();

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

Output:

Buffer before flip: [10, 20, 30]
Position: 1
Limit: 3

Buffer after flip: [10, 20, 30]
Position: 0
Limit: 1

Examples 2:

Java

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

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

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

        // defining and allocating IntBuffer
        // using allocate() method
        IntBuffer intBuffer
            = IntBuffer.allocate(4);

        // put int value in IntBuffer
        // using put() method
        intBuffer.put(20);
        intBuffer.put(34);

        // set position at index 1
        intBuffer.position(1);

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

        // Flip the Buffer
        // using flip() method
        intBuffer.flip();

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

Output:

Buffer before flip: [20, 34, 0, 0]
Position: 1
Limit: 4

Buffer after flip: [20, 34, 0, 0]
Position: 0
Limit: 1

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