运行结果：LITTLE_ENDIAN

public static void main(String[] args) 
{
    try 
    {
        Field f = Unsafe.class.getDeclaredField("theUnsafe");
        f.setAccessible(true);
        Unsafe unsafe=(Unsafe)f.get(null);
        ByteOrder byteOrder=null;
        long a = unsafe.allocateMemory(8); 
        try 
        { 
            unsafe.putLong(a, 0x0102030405060708L);
            byte b = unsafe.getByte(a);
            switch (b) 
            {
                case 0x01:
                    byteOrder = ByteOrder.BIG_ENDIAN;
                    break;
                case 0x08:
                    byteOrder = ByteOrder.LITTLE_ENDIAN;
                    break;
                default:
                    byteOrder = null;
            }
        }
        catch (Exception ee)
        {
            ee.printStackTrace();
        }
        finally 
        {
            unsafe.freeMemory(a);
        }

        System.out.println(byteOrder);
         

    } 
    catch (Exception e) 
    {
        e.printStackTrace();

    } 
}