Data commit

Task/Jewels-and-stones/Java/jewels-and-stones.java

@@ -0,0 +1,25 @@
+import java.util.HashSet;
+import java.util.Set;
+
+public class App {
+    private static int countJewels(String stones, String jewels) {
+        Set<Character> bag = new HashSet<>();
+        for (char c : jewels.toCharArray()) {
+            bag.add(c);
+        }
+
+        int count = 0;
+        for (char c : stones.toCharArray()) {
+            if (bag.contains(c)) {
+                count++;
+            }
+        }
+
+        return count;
+    }
+
+    public static void main(String[] args) {
+        System.out.println(countJewels("aAAbbbb", "aA"));
+        System.out.println(countJewels("ZZ", "z"));
+    }
+}