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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0px; border-collapse: collapse; padding: 0 0 10px 0"> <p style="margin: 10px 0 0 0; margin-top: 0">What a mess. the graalvm.org pages really want you to swallow the cool aid and download their VM.</p> <p style="margin: 10px 0 0 0"> </p> <p style="margin: 10px 0 0 0">But after some hacking here is code to run JS in graal </p> <p style="margin: 10px 0 0 0">h3 Java</p>
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<pre class="code-java" style="margin: 10px 0 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
<span class="code-keyword" style="color: #000091">public</span> <span class="code-keyword" style="color: #000091">static</span> void main(<span class="code-object" style="color: #910091">String</span>[] args) {
<span class="code-object" style="color: #910091">System</span>.out.println(<span class="code-quote" style="color: #009100">"Hello Java!"</span>);
<span class="code-keyword" style="color: #000091">try</span> (Context context = Context.newBuilder().allowExperimentalOptions(<span class="code-keyword" style="color: #000091">true</span>).option(<span class="code-quote" style="color: #009100">"js.nashorn-compat"</span>, <span class="code-quote" style="color: #009100">"<span class="code-keyword" style="color: #000091; color: #009100">true</span>"</span>).build()) {
context.eval(<span class="code-quote" style="color: #009100">"js"</span>, <span class="code-quote" style="color: #009100">"print(<span class="code-quote" style="color: #009100">'Hello JavaScript!'</span>);"</span>);
context.eval(<span class="code-quote" style="color: #009100">"js"</span>, <span class="code-quote" style="color: #009100">"a=42;"</span>);
context.eval(<span class="code-quote" style="color: #009100">"js"</span>, <span class="code-quote" style="color: #009100">"print(<span class="code-quote" style="color: #009100">'Hello'</span>, a);"</span>);
Value v = context.eval(<span class="code-quote" style="color: #009100">"js"</span>, <span class="code-quote" style="color: #009100">"a"</span>);
<span class="code-keyword" style="color: #000091">if</span> (v.isString()) {
<span class="code-object" style="color: #910091">System</span>.out.println(<span class="code-quote" style="color: #009100">"<span class="code-object" style="color: #910091; color: #009100">String</span> : "</span> + v.asString());
} <span class="code-keyword" style="color: #000091">else</span> <span class="code-keyword" style="color: #000091">if</span> (v.isNumber()) {
<span class="code-object" style="color: #910091">System</span>.out.println(<span class="code-quote" style="color: #009100">"<span class="code-object" style="color: #910091; color: #009100">Number</span> : "</span> + v.asInt());
}
}
</pre>
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</div> <p style="margin: 10px 0 0 0">pom</p>
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<pre class="code-java" style="margin: 10px 0 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
<dependency>
<groupId>org.graalvm.sdk</groupId>
<artifactId>graal-sdk</artifactId>
<version>20.0.0</version>
</dependency>
<dependency>
<groupId>org.graalvm.js</groupId>
<artifactId>js</artifactId>
<version>20.0.0</version>
<scope>provided</scope>
</dependency>
</pre>
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</div> <p style="margin: 10px 0 0 0">output</p>
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<pre class="code-java" style="margin: 10px 0 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
Hello Java!
Hello JavaScript!
Hello 42
<span class="code-object" style="color: #910091">Number</span> : 42
</pre>
</div>
</div> <p style="margin: 10px 0 0 0">Note by the way in the example about that there is absolutely no compilation so it ain't going to be super fast. But this is early days in trying to understand this stuff.</p> <p style="margin: 10px 0 0 0">The bottom line is that I think that I can establish a similar framework for this as I proposed for Rhino. Then we can add things in as needed. Might even be able to make it pluggable. </p> <p style="margin: 10px 0 0 0">My strategy now is to write the code as if I had api freedom and then work out how to shoe horn it in to what we have (or not - whats a bit of cut and paste between friends)</p> </td>
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