Here you can find the source of toByteArray(final List
public static final byte[] toByteArray(final List<Byte> pItems)
//package com.java2s; import java.util.List; public class Main { public static final byte[] toByteArray(final List<Byte> pItems) { final byte[] out = new byte[pItems.size()]; for (int i = out.length - 1; i >= 0; i--) { out[i] = pItems.get(i);//www . jav a 2s . c om } return out; } }