feat: Add MorseCodeConverter new algorithm with Junit tests

Author: Hardvan

src/main/java/com/thealgorithms/conversions/MorseCodeConverter.java

@@ -0,0 +1,98 @@
+package com.thealgorithms.conversions;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Converts text to Morse code and vice-versa.
+ * Text to Morse code: Each letter is separated by a space and each word is separated by a pipe (|).
+ * Example: "HELLO WORLD" -> ".... . .-.. .-.. --- | .-- --- .-. .-.. -.."
+ *
+ * Morse code to text: Each letter is separated by a space and each word is separated by a pipe (|).
+ * Example: ".... . .-.. .-.. --- | .-- --- .-. .-.. -.." -> "HELLO WORLD"
+ *
+ * Applications: Used in radio communications and algorithmic challenges.
+ *
+ * @author Hardvan
+ */
+public final class MorseCodeConverter {
+    private MorseCodeConverter() {
+    }
+
+    private static final Map<Character, String> MORSE_MAP = new HashMap<>();
+    private static final Map<String, Character> REVERSE_MAP = new HashMap<>();
+
+    static {
+        MORSE_MAP.put('A', ".-");
+        MORSE_MAP.put('B', "-...");
+        MORSE_MAP.put('C', "-.-.");
+        MORSE_MAP.put('D', "-..");
+        MORSE_MAP.put('E', ".");
+        MORSE_MAP.put('F', "..-.");
+        MORSE_MAP.put('G', "--.");
+        MORSE_MAP.put('H', "....");
+        MORSE_MAP.put('I', "..");
+        MORSE_MAP.put('J', ".---");
+        MORSE_MAP.put('K', "-.-");
+        MORSE_MAP.put('L', ".-..");
+        MORSE_MAP.put('M', "--");
+        MORSE_MAP.put('N', "-.");
+        MORSE_MAP.put('O', "---");
+        MORSE_MAP.put('P', ".--.");
+        MORSE_MAP.put('Q', "--.-");
+        MORSE_MAP.put('R', ".-.");
+        MORSE_MAP.put('S', "...");
+        MORSE_MAP.put('T', "-");
+        MORSE_MAP.put('U', "..-");
+        MORSE_MAP.put('V', "...-");
+        MORSE_MAP.put('W', ".--");
+        MORSE_MAP.put('X', "-..-");
+        MORSE_MAP.put('Y', "-.--");
+        MORSE_MAP.put('Z', "--..");
+
+        // Build reverse map for decoding
+        MORSE_MAP.forEach((k, v) -> REVERSE_MAP.put(v, k));
+    }
+
+    /**
+     * Converts text to Morse code.
+     * Each letter is separated by a space and each word is separated by a pipe (|).
+     *
+     * @param text The text to convert to Morse code.
+     * @return The Morse code representation of the text.
+     */
+    public static String textToMorse(String text) {
+    StringBuilder morse = new StringBuilder();
+    String[] words = text.toUpperCase().split(" ");
+    for (int i = 0; i < words.length; i++) {
+        for (char c : words[i].toCharArray()) {
+            morse.append(MORSE_MAP.getOrDefault(c, "")).append(" ");
+        }
+        if (i < words.length - 1) {
+            morse.append("| ");
+        }
+    }
+    return morse.toString().trim();
+}
+
+    /**
+     * Converts Morse code to text.
+     * Each letter is separated by a space and each word is separated by a pipe (|).
+     *
+     * @param morse The Morse code to convert to text.
+     * @return The text representation of the Morse code.
+     */
+    public static String morseToText(String morse) {
+    StringBuilder text = new StringBuilder();
+    String[] words = morse.split(" \\| ");
+    for (int i = 0; i < words.length; i++) {
+        for (String code : words[i].split(" ")) {
+            text.append(REVERSE_MAP.getOrDefault(code, '?'));
+        }
+        if (i < words.length - 1) {
+            text.append(" ");
+        }
+    }
+    return text.toString();
+}
+}

src/test/java/com/thealgorithms/conversions/MorseCodeConverterTest.java

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+package com.thealgorithms.conversions;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.api.Test;
+
+public class MorseCodeConverterTest {
+
+    @Test
+    public void testTextToMorse() {
+        assertEquals(".- -...", MorseCodeConverter.textToMorse("AB"));
+        assertEquals(".... . .-.. .-.. --- | .-- --- .-. .-.. -..", MorseCodeConverter.textToMorse("HELLO WORLD"));
+    }
+
+    @Test
+    public void testMorseToText() {
+        assertEquals("AB", MorseCodeConverter.morseToText(".- -..."));
+    }
+}