First version

tests/ide_samples/Sum.java

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+import java.lang.management.ManagementFactory;
+import java.util.Scanner;
+public class Sum {
+    public static void main(String[] args) {
+        if (!System.getProperty("java.version").equals("25.0.4.1"))
+            throw new IllegalStateException("Java 25.0.4.1 is required");
+        var vmArgs = ManagementFactory.getRuntimeMXBean().getInputArguments();
+        for (String flag : new String[]{"-Dfile.encoding=UTF-8", "-XX:+UseSerialGC", "-Xss64m", "-XX:TieredStopAtLevel=1", "-XX:ActiveProcessorCount=2", "-Xms2048m", "-Xmx2048m"})
+            if (!vmArgs.contains(flag)) throw new IllegalStateException("Missing " + flag);
+        System.out.println("Java " + System.getProperty("java.version"));
+        System.out.println("VM: " + vmArgs);
+        System.out.print("Input two integers: ");
+        Scanner in = new Scanner(System.in);
+        System.out.println("SUM = " + (in.nextLong() + in.nextLong()));
+    }
+}