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ByteBuffer allocate() method in Java
A new ByteBuffer can be allocated using the method allocate() in the class java.nio.ByteBuffer. This method requires a single parameter i.e. the capacity of the buffer. It returns the new ByteBuffer that is allocated. If the capacity provided is negative, then the IllegalArgumentException is thrown.
A program that demonstrates this is given as follows −
Example
import java.nio.*; import java.util.*; public class Demo { public static void main(String[] args) { int n = 5; try { ByteBuffer buffer = ByteBuffer.allocate(n); buffer.put((byte)1); buffer.put((byte)2); buffer.put((byte)3); buffer.put((byte)4); buffer.put((byte)5); buffer.rewind(); System.out.println("The ByteBuffer is: " + Arrays.toString(buffer.array())); } catch (IllegalArgumentException e) { System.out.println("Error!!! IllegalArgumentException"); } catch (ReadOnlyBufferException e) { System.out.println("Error!!! ReadOnlyBufferException"); } } }
Output
The ByteBuffer is: [1, 2, 3, 4, 5]
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