yes there's a bit of java in my nvim config why do you ask?

extras/JavaVersion.java

@@ -0,0 +1,13 @@
+/*
+ * JavaVersion returns the version of java interpreter running it. Inspired by
+ * "libraries/javacheck/JavaCheck.java" in PrismLauncher.
+ */
+public final class JavaVersion {
+  public static void main(String[] args) {
+    String p = System.getProperty("java.version");
+    if (p != null)
+      System.out.println(p);
+    else
+      System.exit(1);
+  }
+}