Java IO Tutorial - Java ByteBuffer.compact()

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Syntax

ByteBuffer.compact() has the following syntax.

public abstract ByteBuffer compact()

Example

In the following code shows how to use ByteBuffer.compact() method.

//  www  .j  a v  a 2s .c  o  m
import java.nio.ByteBuffer;
import java.util.Arrays;

public class Main {
  public static void main(String[] argv) throws Exception {
    ByteBuffer bbuf = ByteBuffer.allocate(10);
    int capacity = bbuf.capacity(); // 10
    System.out.println(capacity);
    bbuf.putShort(2,(short)123);
    
    ByteBuffer bb = bbuf.compact();
    
    System.out.println(Arrays.toString(bb.array()));
  }
}

The code above generates the following result.

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