/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.nio.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
 
int sizeOfDouble = 8;
int numberOfDoubles = 4;
ByteBuffer testBuf = ByteBuffer.allocateDirect(sizeOfDouble*numberOfDoubles);
 
testBuf.putDouble(0*sizeOfDouble, 1.0);
testBuf.putDouble(1*sizeOfDouble, 2.0);
testBuf.putDouble(2*sizeOfDouble, 3.0);
testBuf.putDouble(3*sizeOfDouble, 4.0);
 
for (int i = 0; i < numberOfDoubles; ++i) {
    System.out.println("testBuf[" + i + "]: " + testBuf.getDouble(sizeOfDouble*i));
}
 
	}
}

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