Example class for Graal. (eugenp#5486)

core-java-10/src/main/java/com/baeldung/graal/CountUppercase.java

@@ -0,0 +1,25 @@
+package com.baeldung.graal;
+
+public class CountUppercase {
+    static final int ITERATIONS = Math.max(Integer.getInteger("iterations", 1), 1);
+
+    public static void main(String[] args) {
+        String sentence = String.join(" ", args);
+        for (int iter = 0; iter < ITERATIONS; iter++) {
+            if (ITERATIONS != 1) System.out.println("-- iteration " + (iter + 1) + " --");
+            long total = 0, start = System.currentTimeMillis(), last = start;
+            for (int i = 1; i < 10_000_000; i++) {
+                total += sentence
+                  .chars()
+                  .filter(Character::isUpperCase)
+                  .count();
+                if (i % 1_000_000 == 0) {
+                    long now = System.currentTimeMillis();
+                    System.out.printf("%d (%d ms)%n", i / 1_000_000, now - last);
+                    last = now;
+                }
+            }
+            System.out.printf("total: %d (%d ms)%n", total, System.currentTimeMillis() - start);
+        }
+    }
+}