BAEL-6811 move string article to make space for a new one using the same library; delete extra file

core-java-modules/core-java-string-algorithms-3/README.md

@@ -11,3 +11,4 @@ This module contains articles about string-related algorithms.
 - [Find the First Non Repeating Character in a String in Java](https://www.baeldung.com/java-find-the-first-non-repeating-character)
 - [Find the First Embedded Occurrence of an Integer in a Java String](https://www.baeldung.com/java-string-find-embedded-integer)
 - [Find the Most Frequent Characters in a String](https://www.baeldung.com/java-string-find-most-frequent-characters)
+- [Checking If a String Is a Repeated Substring](https://www.baeldung.com/java-repeated-substring)

core-java-modules/core-java-string-algorithms/README.md

@@ -11,6 +11,5 @@ This module contains articles about string-related algorithms.
 - [How to Reverse a String in Java](https://www.baeldung.com/java-reverse-string)
 - [Check if a String Is a Pangram in Java](https://www.baeldung.com/java-string-pangram)
 - [Check If a String Contains Multiple Keywords in Java](https://www.baeldung.com/string-contains-multiple-words)
-- [Checking If a String Is a Repeated Substring](https://www.baeldung.com/java-repeated-substring)
 - [Remove Emojis from a Java String](https://www.baeldung.com/java-string-remove-emojis)
 - More articles: [[next -->]](../core-java-string-algorithms-2)

core-java-modules/core-java-string-conversions-3/src/java.com.baeldung.multivluehashmap/MultiValueHashMapTest.java

@@ -1,79 +0,0 @@
-import org.junit.jupiter.api.Test;
-
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-
-import static org.junit.jupiter.api.Assertions.*;
-
-public class MultiValueHashMapTest {
-    @Test
-    public void given_MultiValueHashMap_whenPuttingAndGettingSingleValue_thenValueIsRetrieved() {
-        MultiValueHashMap<String, Integer> map = new MultiValueHashMap<>();
-        map.put("key1", 10);
-        assertEquals(List.of(10), map.get("key1"));
-    }
-
-    @Test
-    public void given_MultiValueHashMap_whenPuttingAndGettingMultipleValues_thenAllValuesAreRetrieved() {
-        MultiValueHashMap<String, String> map = new MultiValueHashMap<>();
-        map.put("key2", "value1");
-        map.put("key2", "value2");
-        map.put("key2", "value3");
-
-        assertEquals(List.of("value1", "value2", "value3"), map.get("key2"));
-    }
-
-    @Test
-    public void given_MultiValueHashMap_whenGettingNonExistentKey_thenEmptyListIsReturned() {
-        MultiValueHashMap<String, Double> map = new MultiValueHashMap<>();
-        assertTrue(map.get("nonexistent").isEmpty());
-    }
-
-    @Test
-    public void given_MultiValueHashMap_whenRemovingValue_thenValueIsSuccessfullyRemoved() {
-        MultiValueHashMap<Integer, String> map = new MultiValueHashMap<>();
-        map.put(1, "one");
-        map.put(1, "uno");
-        map.put(1, "eins");
-
-        map.remove(1, "uno");
-        assertEquals(List.of("one", "eins"), map.get(1));
-    }
-
-    @Test
-    public void testRemoveNonExistentValue() {
-        MultiValueHashMap<Integer, String> map = new MultiValueHashMap<>();
-        map.put(1, "one");
-        map.remove(1, "nonexistent");
-        assertEquals(List.of("one"), map.get(1));
-    }
-
-    public class MultiValueHashMap<K, V> {
-        private HashMap<K, ArrayList<V>> map;
-
-        // Constructor
-        public MultiValueHashMap() {
-            map = new HashMap<>();
-        }
-
-        public void put(K key, V value) {
-            if (!map.containsKey(key)) {
-                map.put(key, new ArrayList<>());
-            }
-            map.get(key).add(value);
-        }
-
-        public List<V> get(K key) {
-            return map.getOrDefault(key, new ArrayList<>());
-        }
-
-        public void remove(K key, V value) {
-            if (map.containsKey(key)) {
-                map.get(key).remove(value);
-            }
-        }
-
-
-    }
-}