FloatBuffer wrap() method in Java

A float array can be wrapped into a buffer using the method wrap() in the class java.nio.FloatBuffer. This method requires a single parameter i.e. the array to be wrapped into a buffer and it returns the new buffer created. If the returned buffer is modified, then the contents of the array are also similarly modified and vice versa.

A program that demonstrates this is given as follows −

Example

 Live Demo

import java.nio.*; import java.util.*; public class Demo {    public static void main(String[] args) {       try {          float[] arr = { 8.7F, 1.5F, 3.2F, 7.4F, 5.9F };          System.out.println("The array length is: " + arr.length);          System.out.println("Array elements are: " + Arrays.toString(arr));          FloatBuffer buffer = FloatBuffer.wrap(arr);          buffer.rewind();          System.out.println("\nThe FloatBuffer is: " + Arrays.toString(buffer.array()));          System.out.println("The position is: " + buffer.position());          System.out.println("The capacity is: " + buffer.capacity());       } catch (IllegalArgumentException e) {          System.out.println("Error!!! IllegalArgumentException");       } catch (ReadOnlyBufferException e) {          System.out.println("Error!!! ReadOnlyBufferException");       }    } }

The output of the above program is as follows −

Output

The array length is: 5 Array elements are: [8.7, 1.5, 3.2, 7.4, 5.9] The FloatBuffer is: [8.7, 1.5, 3.2, 7.4, 5.9] The position is: 0 The capacity is: 5