case conversion snippets

Author: Mcbencrafter

snippets/java/string-manipulation/camelcase-to-snake-case.md

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+---
+title: camelCase to snake_case
+description: Converts a camelCase string into snake_case
+author: Mcbencrafter
+tags: string,conversion,camel-case,snake-case
+---
+
+```java
+public static String camelToSnake(String camelCase) {
+    return camelCase.replaceAll("([a-z])([A-Z])", "$1_$2").toLowerCase();
+}
+
+// Usage:
+System.out.println(camelToSnake("helloWorld")); // "hello_world"
+```

snippets/java/string-manipulation/snake-case-to-camelcase.md

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+---
+title: snake_case to camelCase
+description: Converts a snake_case string into camelCase
+author: Mcbencrafter
+tags: string,conversion,camel-case,snake-case
+---
+
+```java
+import java.util.regex.Pattern;
+
+public static String snakeToCamel(String snakeCase) {
+    return Pattern.compile("(_)([a-z])")
+        .matcher(snakeCase)
+        .replaceAll(match -> match.group(2).toUpperCase());
+}
+
+// Usage:
+System.out.println(snakeToCamel("hello_world")); // "helloWorld"
+```

snippets/java/string-manipulation/string-to-camelcase.md

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+---
+title: String To camelCase
+description: Converts a string into camelCase
+author: Mcbencrafter
+tags: string,conversion,camel-case
+---
+
+```java
+public static String stringToCamelCase(String text) {
+    String[] words = text.split("\\s+");
+    StringBuilder camelCase = new StringBuilder(
+        words[0].substring(0, 1).toLowerCase() + words[0].substring(1)
+    );
+
+    for (int i = 1; i < words.length; i++) {
+        camelCase.append(words[i].substring(0, 1).toUpperCase());
+        camelCase.append(words[i].substring(1));
+    }
+
+    return camelCase.toString();
+}
+
+// Usage:
+System.out.println(stringToCamelCase("Hello world test")); // "helloWorldTest"
+```

snippets/java/string-manipulation/string-to-param-case.md

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+---
+title: String To param-case
+description: Converts a string into param-case
+author: Mcbencrafter
+tags: string,conversion,param-case
+---
+
+```java
+public static String stringToParamCase(String text) {
+    return text.toLowerCase().replaceAll("\\s+", "-");
+}
+
+// Usage:
+System.out.println(stringToParamCase("Hello World 123")); // "hello-world-123"
+```

snippets/java/string-manipulation/string-to-pascalcase.md

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+---
+title: String To PascalCase
+description: Converts a string into PascalCase
+author: Mcbencrafter
+tags: string,conversion,pascal-case
+---
+
+```java
+public static String stringToPascalCase(String text) {
+    String[] words = text.split("\\s+");
+    StringBuilder pascalCase = new StringBuilder();
+
+    for (String word : words) {
+        pascalCase.append(word.substring(0, 1).toUpperCase());
+        pascalCase.append(word.substring(1).toLowerCase());
+    }
+
+    return pascalCase.toString();
+}
+
+// Usage:
+System.out.println(stringToPascalCase("hello world")); // "HelloWorld"
+```

snippets/java/string-manipulation/string-to-snake-case.md

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+---
+title: String To snake_case
+description: Converts a string into snake_case
+author: Mcbencrafter
+tags: string,conversion,snake-case
+---
+
+```java
+public static String stringToSnakeCase(String text) {
+    return text.toLowerCase().replaceAll("\\s+", "_");
+}
+
+// Usage:
+System.out.println(stringToSnakeCase("Hello World 123")); // "hello_world_123"
+```

snippets/java/string-manipulation/string-to-titlecase.md

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+---
+title: String To Titlecase
+description: Converts a string into Title Case, where the first letter of each word is capitalized and the remaining letters are lowercase
+author: Mcbencrafter
+tags: string,conversion,title-case
+---
+
+```java
+public static String convertToTitleCase(String text) {
+    String[] words = text.split("(?<=\\S)(?=\\s+)|(?<=\\s+)(?=\\S)"); // this is needed to preserve spaces (text.split(" ") would remove multiple spaces)
+    StringBuilder capitalizedText = new StringBuilder();
+
+    for (String word : words) {
+        if (word.trim().isEmpty()) {
+            capitalizedText.append(word);
+            continue;
+        }
+
+        capitalizedText.append(Character.toUpperCase(word.charAt(0)))
+                .append(word.substring(1).toLowerCase());
+    }
+
+    return capitalizedText.toString().trim();
+}
+
+// Usage:
+System.out.println(convertToTitleCase("heLlo wOrld")); // "Hello World"
+```