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FloatBuffer flip() methods in Java with Examples

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  • Last Updated : 26 Aug, 2019
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The flip() method of java.nio.FloatBuffer Class is used to flip this buffer. By flipping this buffer, it meant that the buffer will be trimmed to the current position and the 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 FloatBuffer flip()

Return Value: This method returns the flipped FloatBuffer instance.

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

Examples 1:




// 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 double array
        float[] db
            = { 10.56f, 20.34f, 30.78f };
  
        // wrap the float array
        // into FloatBuffer
        // using wrap() method
        FloatBuffer floatBuffer
            = FloatBuffer.wrap(db);
  
        // set position at index 1
        floatBuffer.position(1);
  
        // print the buffer
        System.out.println(
            "Buffer before flip: "
            + Arrays.toString(
                  floatBuffer.array())
            + "\nPosition: "
            + floatBuffer.position()
            + "\nLimit: "
            + floatBuffer.limit());
  
        // Flip the Buffer
        // using flip() method
        floatBuffer.flip();
  
        // print the buffer
        System.out.println(
            "\nBuffer after flip: "
            + Arrays.toString(
                  floatBuffer.array())
            + "\nPosition: "
            + floatBuffer.position()
            + "\nLimit: "
            + floatBuffer.limit());
    }
}

Output:

Buffer before flip: [10.56, 20.34, 30.78]
Position: 1
Limit: 3

Buffer after flip: [10.56, 20.34, 30.78]
Position: 0
Limit: 1

Examples 2:




// Java program to demonstrate
// flip() method
  
import java.nio.*;
import java.util.*;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // defining and allocating FloatBuffer
        // using allocate() method
        FloatBuffer floatBuffer
            = FloatBuffer.allocate(4);
  
        // put float value in FloatBuffer
        // using put() method
        floatBuffer.put(20.4f);
        floatBuffer.put(34.5f);
  
        // set position at index 1
        floatBuffer.position(1);
  
        // print the buffer
        System.out.println(
            "Buffer before flip: "
            + Arrays.toString(
                  floatBuffer.array())
            + "\nPosition: "
            + floatBuffer.position()
            + "\nLimit: "
            + floatBuffer.limit());
  
        // Flip the Buffer
        // using flip() method
        floatBuffer.flip();
  
        // print the buffer
        System.out.println(
            "\nBuffer after flip: "
            + Arrays.toString(
                  floatBuffer.array())
            + "\nPosition: "
            + floatBuffer.position()
            + "\nLimit: "
            + floatBuffer.limit());
    }
}

Output:

Buffer before flip: [20.4, 34.5, 0.0, 0.0]
Position: 1
Limit: 4

Buffer after flip: [20.4, 34.5, 0.0, 0.0]
Position: 0
Limit: 1

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


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