Your comment isn&#x27;t coherent, but I think you&#x27;re asking, &quot;What fair-use defense is Google asserting?&quot;<p>One approach is for Google to say, &quot;Developers expect a reasonable platform that they are familiar with. To give them that, we had to use Java (or C# or similar).&quot;<p>In other words, it is an interoperability defense, but for compatibility with developers, not devices or software.