import java.nio.ByteBuffer;

public class ByteBufferDemo{

public static void main(String[] args){

ByteBuffer buffer1= ByteBuffer.allocate(10);

if(buffer1.hasArray()){

System.out.println("buffer1 array: " + buffer1.array());

System.out.println("buffer1 array offset: " + buffer1.arrayOffset());

System.out.println("Capacity: " + buffer1.capacity());

System.out.println("Limit: " + buffer1.limit());

System.out.println("Position: " + buffer1.position());

System.out.println("Remaing: " + buffer1.remaining());

System.out.println();

}

byte[] bytes = new byte[128];

ByteBuffer buffer2 = ByteBuffer.wrap(bytes, 10, 50);

if(buffer2.hasArray()){

System.out.println("buffer2 array: " + buffer2.array());

System.out.println("buffer2 array offset: " + buffer2.arrayOffset());

System.out.println("Capacity: " + buffer2.capacity());

System.out.println("Limit: " + buffer2.limit());

System.out.println("Position: " + buffer2.position());

System.out.println("Remaing: " + buffer2.remaining());

System.out.println();

}

// explore the view buffer, buffer backed by another buffer.

ByteBuffer bufferView = buffer1.duplicate();

System.out.println("buffer view changed the element at current position:" + bufferView.position() + " to be 10");

bufferView.put((byte)10);

System.out.println("buffer1 position: " + buffer1.position() + ", remaining: " + buffer1.remaining());

System.out.println("view buffer position: " + bufferView.position() + ", remaining: " + bufferView.remaining());

System.out.println("buffer1 get the corresponding element changed by view buffer: " + buffer1.get());

}

}