jason810496 commented on code in PR #65956:
URL: https://github.com/apache/airflow/pull/65956#discussion_r3158667503
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java-sdk/sdk/src/main/kotlin/org/apache/airflow/sdk/execution/Client.kt:
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Review Comment:
I had the same question when I start this project, here's the comparison
between Kotlin and Java that I ask Claude before.
Perhaps naming the SDK and corresponding provider as `jvm` might be more
accurate?
---
<h3 class="text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold">🐍 → ☕ Your
Mental Map: Python vs Java vs Kotlin</h3>
<h4 class="text-text-100 mt-2 -mb-1 text-base font-bold">What Are They?</h4>
<div class="overflow-x-auto w-full px-2 mb-6">
| Python | Java | Kotlin
-- | -- | -- | --
Type System | Dynamic (types checked at runtime) | Static (types checked at
compile time) | Static (but smarter — often inferred)
Compilation | Interpreted | Compiled → JVM bytecode | Compiled → JVM
bytecode (or JS/Native)
Verbosity | Low | High | Medium (Java's "fix")
Performance | Slower | Fast | Fast (same as Java)
Null Safety | None can crash anywhere | null can crash anywhere
(NullPointerException) | Null safety built into the type system
Age | 1991 | 1995 | 2011 (by JetBrains)
</div>
<hr class="border-border-200 border-t-0.5 my-3 mx-1.5">
<h3 class="text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold">🤝 Why Are
Java & Kotlin Used Together?</h3>
<p class="font-claude-response-body break-words whitespace-normal
leading-[1.7]">This is the key insight: <strong>Kotlin compiles to the same JVM
bytecode as Java.</strong> They are 100% interoperable.</p>
<div role="group" aria-label="Code" tabindex="0" class="relative group/copy
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focus-visible:ring-2 focus-visible:ring-accent-100"><div class="sticky
opacity-0 group-hover/copy:opacity-100 group-focus-within/copy:opacity-100
top-2 py-2 h-12 w-0 float-right"><div class="absolute right-0 h-8 px-2
items-center inline-flex z-10"><button class="inline-flex
items-center
justify-center
relative
isolate
shrink-0
can-focus
select-none
disabled:pointer-events-none
disabled:opacity-50
disabled:shadow-none
disabled:drop-shadow-none border-transparent
transition
font-base
duration-300
ease-[cubic-bezier(0.165,0.85,0.45,1)] h-8 w-8 rounded-md
backdrop-blur-md _fill_10ocf_9 _ghost_10ocf_96" type="button" aria-label="Copy
to clipboard" data-state="closed"><div class="relative"><div
class="transition-all opacity-100 scale-100" style="width: 20px; height: 20px;
display: flex; align-items: center; justify-content: center;"><svg width="20"
height="20" viewBox="0 0 20 20" fill="currentColor"
xmlns="http://www.w3.org/2000/svg"; class="transition-all opacity-100 scale-100"
aria-hidden="true" style="flex-shrink: 0;"><path d="M12.5 3A1.5 1.5 0 0 1 14
4.5V6h1.5A1.5 1.5 0 0 1 17 7.5v8a1.5 1.5 0 0 1-1.5 1.5h-8A1.5 1.5 0 0 1 6
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0-.5-.5z"></path></svg></div><div class="absolute inset-0 flex items-center
justify-center"><div class="transition-all opaci
ty-0 scale-50" style="width: 20px; height: 20px; display: flex; align-items:
center; justify-content: center;"><svg width="20" height="20" viewBox="0 0 20
20" fill="currentColor" xmlns="http://www.w3.org/2000/svg";
class="transition-all opacity-0 scale-50" aria-hidden="true"
style="flex-shrink: 0;"><path d="M15.188 5.11a.5.5 0 0 1 .752.626l-.056.084-7.5
9a.5.5 0 0 1-.738.033l-3.5-3.5-.064-.078a.501.501 0 0 1 .693-.693l.078.064
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class="overflow-x-auto"><pre class="code-block__code !my-0 !rounded-lg !text-sm
!leading-relaxed p-3.5" style="color: rgb(234, 236, 240); background:
transparent; font-family: var(--font-mono);"><code style="color: rgb(234, 236,
240); background: transparent; font-family: var(--font-mono); white-space:
pre-wrap;"><span><span>Your Kotlin Code (.kt) ──┐
</span></span><span> ├──► JVM Bytecode (.class)
──► Runs on JVM
</span><span>Your Java Code (.java) ──┘</span></code></pre></div></div>
<p class="font-claude-response-body break-words whitespace-normal
leading-[1.7]"><strong>Real-world reasons they coexist:</strong></p>
<ol class="[li_&]:mb-0 [li_&]:mt-1 [li_&]:gap-1
[&:not(:last-child)_ul]:pb-1 [&:not(:last-child)_ol]:pb-1 list-decimal
flex flex-col gap-1 pl-8 mb-3">
<li class="whitespace-normal break-words pl-2"><strong>Legacy</strong> —
Millions of lines of Java exist in production. Companies can't rewrite
everything overnight.</li>
<li class="whitespace-normal break-words pl-2"><strong>Gradual
migration</strong> — Teams adopt Kotlin file-by-file, calling Java from Kotlin
and vice versa.</li>
<li class="whitespace-normal break-words pl-2"><strong>Android</strong> —
Google made Kotlin the official Android language in 2017, but all Android
libraries were written in Java.</li>
<li class="whitespace-normal break-words pl-2"><strong>Libraries</strong> —
The entire Java ecosystem (Spring, Hibernate, etc.) is available to Kotlin for
free.</li></ol>
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