<div class="code-block-container"><pre class="language-kotlin"><code class="language-kotlin">Date(1999, 12, 31)
</code></pre></div><div class="code-block-container"><pre><code>'constructor Date(Int, Int, Int)' is deprecated. Deprecated in Java
</code></pre></div>らしい

<div class="code-block-container"><pre class="language-kt"><code class="language-kt">val cal = Calendar.getInstance()
cal.set(1999, 12, 31)
date: Date = cal.time
</code></pre></div>こんなかんじでやれば Date がとれた