CR-MicroLabs-JavaFundamentals-DanDoBetterDrills/StringUtilities.java

/**
 *  jaejoson on 10/18/18
 */
public class StringUtilities {
    /**
     * @return `Hello World` as a string
     */
    public static String getHelloWorld() {
        String getHelloWorld = "Hello World";
        return getHelloWorld;
    }

    /**
     * @param firstSegment a string to be added to
     * @param secondSegment a string to add
     * @return the concatenation of two strings, `firstSegment`, and `secondSegment`
     */
    public static String concatenation(String firstSegment, String secondSegment){
        String combo = firstSegment + secondSegment;
        return combo;
    }

    /**
     * @param firstSegment a string to be added to
     * @param secondSegment a string to add
     * @return the concatenation of an integer, `firstSegment`, and a String, `secondSegment`
     */
    public static String concatenation(int firstSegment, String secondSegment){
        String combo = firstSegment + secondSegment;
        return combo;
    }

    /**
     * @param input a string to be manipulated
     * @return the first 3 characters of `input`
     */
    public static String getPrefix(String input){
        String mani = input.substring(0, 3);
        return mani;
    }

    /**
     * @param input a string to be manipulated
     * @return the last 3 characters of `input`
     */
    public static String getSuffix(String input){
        String mani = input.substring((input.length()-3), input.length());
        return mani;
    }

    /**
     * @param inputValue the value to be compared
     * @param comparableValue the value to be compared against
     * @return the equivalence of two strings, `inputValue` and `comparableValue`
     */
    public static Boolean compareTwoStrings(String inputValue, String comparableValue){
        Boolean compar = inputValue.equals(comparableValue);
        return compar;
    }

     /**
     * @param inputValue the value input from user
     * @return the middle character of `inputValue`
     */
    public static Character getMiddleCharacter(String inputValue){
         int theMiddleOne;
       if ((inputValue.length()/2)% 2 == 0) {
             theMiddleOne = ((inputValue.length()/2) - 1);
        } else {
            theMiddleOne = (inputValue.length()/2); 
        }
         return inputValue.charAt(theMiddleOne); 
           
   
    } 

    /**
     * @param spaceDelimitedString a string, representative of a sentence, containing spaces
     * @return the first sequence of characters
     */
    public static String getFirstWord(String spaceDelimitedString){
          String fir[] = spaceDelimitedString.split(" ");
          return fir[0];
        /*int index = spaceDelimitedString.indexOf(' ');
            if (index > -1) {
                return spaceDelimitedString.substring(0, index); 
            } else {
                return spaceDelimitedString; 
            }
             */
    }

    /**
     * @param spaceDelimitedString a string delimited by spaces
     * @return the second word of a string delimited by spaces.
     */
    public static String getSecondWord(String spaceDelimitedString){
        String sec[] = spaceDelimitedString.split(" ");
        return sec[1];
    }

    /**
     * @param stringToReverse
     * @return an identical string with characters in reverse order.
    */
   public static String reverse(String stringToReverse) {
           StringBuilder newRev = new StringBuilder(stringToReverse);
           return newRev.reverse().toString();

}
}