Added function in Pangram.java (TheAlgorithms#3703)

TaranjeetSinghKalsi · Debasish Biswas · web-flow · commit acf7a86b9609 · 2022-10-27T23:26:34.000+05:30
* Added function in Pangram.java

Added isPangramIndexOf() function in Pangram.java

* Added Tests for new function

Added Tests for isPangramIndexOf() function

* fixed typo

* changed function name

* changed function name

Co-authored-by: Debasish Biswas &lt;debasishbsws.abc@gmail.com&gt;
diff --git a/src/main/java/com/thealgorithms/strings/Pangram.java b/src/main/java/com/thealgorithms/strings/Pangram.java
@@ -36,4 +36,23 @@ public static boolean isPangram(String s) {
         }
         return true;
     }
+    
+    /**
+     * Checks if a String is Pangram or not by checking if each alhpabet is present or not
+     *
+     * @param s The String to check
+     * @return {@code true} if s is a Pangram, otherwise {@code false}
+     */
+    public static boolean isPangram2(String s) {
+        if (s.length() < 26) {
+            return false;
+        }
+        s = s.toLowerCase(); // Converting s to Lower-Case
+        for (char i = 'a'; i <= 'z'; i++) {
+            if (s.indexOf(i) == -1) {
+                return false; // if any alphabet is not present, return false
+            }
+        }
+        return true;
+    }
 }
diff --git a/src/test/java/com/thealgorithms/strings/PangramTest.java b/src/test/java/com/thealgorithms/strings/PangramTest.java
@@ -1,17 +1,20 @@
 package com.thealgorithms.strings;
 
-import static com.thealgorithms.strings.Pangram.isPangram;
 import static org.junit.jupiter.api.Assertions.*;
-
 import org.junit.jupiter.api.Test;
 
 public class PangramTest {
 
     @Test
     public void testPangram() {
-        assertTrue(isPangram("The quick brown fox jumps over the lazy dog"));
-        assertFalse(isPangram("The quick brown fox jumps over the azy dog")); // L is missing
-        assertFalse(isPangram("+-1234 This string is not alphabetical"));
-        assertFalse(isPangram("\u0000/\\ Invalid characters are alright too"));
+        assertTrue(Pangram.isPangram("The quick brown fox jumps over the lazy dog"));
+        assertFalse(Pangram.isPangram("The quick brown fox jumps over the azy dog")); // L is missing
+        assertFalse(Pangram.isPangram("+-1234 This string is not alphabetical"));
+        assertFalse(Pangram.isPangram("\u0000/\\ Invalid characters are alright too"));
+        
+        assertTrue(Pangram.isPangram2("The quick brown fox jumps over the lazy dog"));
+        assertFalse(Pangram.isPangram2("The quick brown fox jumps over the azy dog")); // L is missing
+        assertFalse(Pangram.isPangram2("+-1234 This string is not alphabetical"));
+        assertFalse(Pangram.isPangram2("\u0000/\\ Invalid characters are alright too"));
     }
 }
