Given a string in a Snake Case, the task is to write a Java program to convert the given string from a snake box to a camel box and print the modified string.
Examples:
Input: str = “geeks_for_geeks” Output: GeeksForGeeks Input: str = “snake_case_to_camel_case” Output: SnakeCaseToCamelCase
Below is the implementation of the above approach:
// Java program for the above approach import java.io.*; class GFG { // Function to convert snake case // to camel case public static String snakeToCamel(String str) { // Capitalize first letter of string str = str.substring(0, 1).toUpperCase() + str.substring(1); // Convert to StringBuilder StringBuilder builder = new StringBuilder(str); // Traverse the string character by // character and remove underscore // and capitalize next letter for (int i = 0; i < builder.length(); i++) { // Check char is underscore if (builder.charAt(i) == '_') { builder.deleteCharAt(i); builder.replace( i, i + 1, String.valueOf( Character.toUpperCase( builder.charAt(i)))); } } // Return in String type return builder.toString(); } // Driver Code public static void main(String[] args) { // Given String String str = "geeks_for_geeks"; // Function Call str = snakeToCamel(str); // Modified String System.out.println(str); } }
Output:
GeeksForGeeks
Method 2: Using String.replaceFirst() method
Below is the implementation of the above approach:
// Java program for the above approach class GFG { // Function to convert the string // from snake case to camel case public static String snakeToCamel(String str) { // Capitalize first letter of string str = str.substring(0, 1).toUpperCase() + str.substring(1); // Run a loop till string // string contains underscore while (str.contains("_")) { // Replace the first occurrence // of letter that present after // the underscore, to capitalize // form of next letter of underscore str = str .replaceFirst( "_[a-z]", String.valueOf( Character.toUpperCase( str.charAt( str.indexOf("_") + 1)))); } // Return string return str; } // Driver Code public static void main(String args[]) { // Given string String str = "geeks_for_geeks"; // Print the modified string System.out.print(snakeToCamel(str)); } }
Output:
GeeksForGeeks