CapitalizeOnlyFirstLetter

Author: williamniemiec

README.md

@@ -60,7 +60,8 @@ System.out.println( StringUtils.implode(words, " ") );
 |        Property        |Type|Description|Default|
 |----------------|-------------------------------|-----------------------------|--------|
 |implode |`(list: List<T>, delimiter: String): String`|Converts elements of a list into a string by separating each element with a delimiter| - |
-|capitalize |`(text: String): String`|Converts elements of a list into a string by separating each element with a delimiter| - |
+|capitalize |`(text: String): String`|Converts the first character of a string to an uppercase letter and all other alphabets to lowercase| - |
+|capitalizeOnlyFirstLetter |`(text: String): String`|Converts the first character of a string to an uppercase letter and concatenate it with remaining letters.| - |
 
 
 ## 🚩 Changelog

dist/1.x/string-utils-1.1.1.jar

@@ -6,7 +6,7 @@
 
   <groupId>io.github.wniemiec-util-java</groupId>
   <artifactId>string-utils</artifactId>
-  <version>1.1.0</version>
+  <version>1.1.1</version>
   <name>StringUtils</name>
   <description>Contains methods that perform string manipulation.</description>
   <url>https://github.com/wniemiec-util-java/string-utils</url>
@@ -101,7 +101,7 @@
         <artifactId>maven-jar-plugin</artifactId>
         <version>3.0.2</version>
         <configuration>
-          <outputDirectory>${project.build.directory}/../dist/${version.major}.x</outputDirectory>
+          <outputDirectory>${basedir}/dist/${version.major}.x</outputDirectory>
         </configuration>
       </plugin>
 

dist/1.x/string-utils-1.1.2.jar

@@ -6,7 +6,7 @@
 
   <groupId>wniemiec.util.java</groupId>
   <artifactId>string-utils</artifactId>
-  <version>1.1.0</version>
+  <version>1.1.2</version>
   <name>StringUtils</name>
   <description>Contains methods that perform string manipulation.</description>
   <url>https://github.com/wniemiec-util-java/string-utils</url>

pom-mavencentral.xml

@@ -107,4 +107,29 @@ private static void validateCapitalizeArg(String text) {
             throw new IllegalArgumentException("Text cannot be null");
         }
     }
+
+    /**
+     * Converts the first character of a string to an uppercase letter and 
+     * concatenate it with remaining letters.
+     * 
+     * @param		text Text to be capitalized
+     * 
+     * @return		Capitalized text
+     */
+    public static String capitalizeOnlyFirstLetter(String text) {
+        validateCapitalizeArg(text);
+
+        if (text.isEmpty()) {
+            return text;
+        }
+
+        if (text.length() == 1) {
+            return text.toUpperCase();
+        }
+
+        String firstCharacter = text.substring(0, 1);
+        String remainingText = text.substring(1);
+
+        return firstCharacter.toUpperCase() + remainingText;
+    }
 }

pom.xml

@@ -8,22 +8,22 @@
 class StringUtilsTest {
 
     @Test
-    void testHelloWorld() {
+    void testImplode() {
         List<String> items = List.of("hello", "world");
         String obtained = StringUtils.implode(items, " ");
 
         Assertions.assertEquals("hello world", obtained);
     }
 
     @Test
-    void testNullList() {
+    void testImplodeWithNullList() {
         Assertions.assertThrows(IllegalArgumentException.class, () -> {
             StringUtils.implode(null, " ");
         });
     }
 
     @Test
-    void testNullDelimiter() {
+    void testImplodeWithNullDelimiter() {
         List<String> items = List.of("hello", "world");
 
         Assertions.assertThrows(IllegalArgumentException.class, () -> {
@@ -32,7 +32,7 @@ void testNullDelimiter() {
     }
 
     @Test
-    void testNullDelimiterAndList() {
+    void testImplodeWithNullDelimiterAndList() {
         Assertions.assertThrows(IllegalArgumentException.class, () -> {
             StringUtils.implode(null, null);
         });
@@ -68,4 +68,35 @@ void testCapitalizeNullText() {
             StringUtils.capitalize(null);
         });
     }
+
+    @Test
+    void testCapitalizeOnlyFirstLetterWithTextWith1Character() {
+        String text = "h";
+        String obtained = StringUtils.capitalizeOnlyFirstLetter(text);
+
+        Assertions.assertEquals("H", obtained);
+    }
+
+    @Test
+    void testCapitalizeOnlyFirstLetterWithTextWithMoreThan1Characters() {
+        String text = "hello wOrLd";
+        String obtained = StringUtils.capitalizeOnlyFirstLetter(text);
+
+        Assertions.assertEquals("Hello wOrLd", obtained);
+    }
+
+    @Test
+    void testCapitalizeOnlyFirstLetterWithEmptyText() {
+        String text = "";
+        String obtained = StringUtils.capitalizeOnlyFirstLetter(text);
+
+        Assertions.assertEquals("", obtained);
+    }
+
+    @Test
+    void testCapitalizeOnlyFirstLetterWithNullText() {
+        Assertions.assertThrows(IllegalArgumentException.class, () -> {
+            StringUtils.capitalizeOnlyFirstLetter(null);
+        });
+    }
 }