get pointer of byte array in jna

Question

I have following code in c# and need similar functionality in java using JNA:

IntPtr pImage = SerializeByteArrayToIntPtr(imageData);

public static IntPtr SerializeByteArrayToIntPtr(byte[] arr)
        {
            IntPtr ptr = IntPtr.Zero;
            if (arr != null && arr.Length > 0)
            {
                ptr = Marshal.AllocHGlobal(arr.Length);
                Marshal.Copy(arr, 0, ptr, arr.Length);
            }
            return ptr;
        }