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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]
Updated on: 30-Jul-2019
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