ByteBuffer: isDirect() : ByteBuffer « java.nio « Java by API

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2. java.nio
3. ByteBuffer

ByteBuffer: isDirect()

 

//Contents in a non-direct ByteBuffer are stored in the normal memory. 
//Contents in a direct ByteBuffer are stored in some I/O device.

import java.nio.ByteBuffer;

public class Main {
  public static void main(String[] argv) throws Exception {

    ByteBuffer bbuf = ByteBuffer.wrap(new byte[10]);
    boolean isDirect = bbuf.isDirect(); // false

    bbuf = ByteBuffer.allocate(10);
    isDirect = bbuf.isDirect(); // false

    bbuf = ByteBuffer.allocateDirect(10);
    isDirect = bbuf.isDirect(); // true

  }
}

   
  

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