JavaStringCheese/StringParser.java

/**
 * An introduction to Strings and String methods.
 *
 * @author Wilhem Alcivar
 */
public class StringParser
{
    /**
     * Takes a String and returns that String with all characters uppercased.
     * E.G. cat would become CAT. dOnUt would become DONUT.
     *
     * @param s
     * @return String
     */
    public static String upperCaseString(String s)
    {
        String abc = s.toUpperCase();
        return abc;
    }

    /**
     * Takes a String and returns that String with all characters lowercased.
     * E.G. MOUSE would become mouse. dOnUt would become donut.
     *
     * @param s
     * @return String
     */
    public static String lowerCaseString(String s) {
        String abc = s.toLowerCase();
        return abc;
    }

    /**
     * Takes a String and returns the first character of that string.
     * E.G. cat would return c. Embark would return E.
     *
     * @param s
     * @return String
     */
    public static Character getFirstCharacter(String s) {
        char first= s.charAt(0);
        return first;
    }

    /*
     * Takes a String and returns the character at index n of that string.
     * E.G. cat, 2 would return t. Embark, 4 would return r.
     *
     * @param s
     * @param n
     * @return String
     */

    public static Character getNthCharacter(String s, Integer n) {   
        char fir = s.charAt(n);

        return fir;
    }    

    /*
     * Takes a String and returns that string with the first character uppercased.
     * E.G. cat would return Cat. cofFee would return CofFee.
     *
     * @param s
     * @return String
     *
     */
    public static String upperCaseFirstCharacter(String s) {
        String capital = s.substring(0, 1).toUpperCase() + s.substring(1);
        return capital;

    }

    /*
     * Takes a String and returns that string with the first character of each word in it uppercased
     * and then joined.
     * E.G. dog whistle would return DogWhistle. adjuNCT pRoFessOR would return AdjuctProfessor.
     *
     * @param s
     * @return String
     */
    public static String camelCaseString(String s) {
        String sum=s.toLowerCase();
        
        String first=sum.split(" ")[0];
        String sec=sum.split(" ")[1];
        
        String firstLet = first.substring(0,1).toUpperCase()+first.substring(1).toLowerCase();
        String othLetters = sec.substring(0,1).toUpperCase()+sec.substring(1).toLowerCase();
        String total=firstLet+othLetters;
        return total ;
    }

       
        
    
    /*
     * Takes a String and returns that string with each character lowercased
     * and then joined with an underscore
     * E.G. dog whistle would return dog_whistle. adjuNCT pRoFessOR would return adjuct_professor.
     *
     * @param s
     * @return String
     */
    public static String snakeCaseString(String s) {

        int snakeCase = s.length();
        String Sti = "";

        for (int n = 0; n < snakeCase; n++){
            if (s.charAt (n) == ' '){
                Sti = Sti + '_';
            }
            else 
                Sti = Sti + Character.toLowerCase (s.charAt(n));
        }

        return Sti;
    }

    /**
     * Takes a String and returns the length of that string
     * E.G. cat would return 3. extra would return 5.
     *
     * @param s
     * @return String
     */

    public static Integer getLength(String s) {
        return s.length();

    }

    /**
     * Takes in two strings and returns true if they are equal
     * E.G. example and shelf would return false. 
     * cat and CaT would return false. 
     * Dog and Dog would return true
     *
     * @param s1
     * @param s2
     * @return String
     */
    public static Boolean isEqual(String s1, String s2) {
        if(s1.equals(s2)) {
            return true;
        } else {
            return false;
        }
    }

    /**
     * Takes in two strings and returns true if they are equal
     * E.G. example and shelf would return false. 
     * cat and CaT would return true. 
     * Dog and Dog would return true
     *
     * @param s1
     * @param s2
     * @return String
     */
    public static Boolean isEqualIgnoreCase(String s1, String s2) {
        if (s1.equalsIgnoreCase(s2)){
            return true;
        } else {
            return false;
        }

    }
}