Here is a bunch of String Algorithms, feel free to use them

StringAlgorithms.java

/**
 * Allows you to remove punctuation from a string
 * @param s The String you will be removing the punctuation from
 * @return A new String without punctuation
 */
public static String removePunctuation(String s) {
	String removed = s;
	for(int i = 33; i <= 47; i++) {
		removed = removed.replace(String.valueOf((char) i), "");
	}
	for(int i = 58; i <= 64; i++) {
		removed = removed.replace(String.valueOf((char) i), "");
	}
	for(int i = 91; i <= 96; i++) {
		removed = removed.replace(String.valueOf((char) i), "");
	}
	for(int i = 123; i <= 126; i++) {
		removed = removed.replace(String.valueOf((char) i), "");
	}
	return removed;
}

/**
 * Returns the first word of the String, if the String is only one word, will return the string
 * @param s The String itself
 * @param trim Whether to trim the String before finding the first word
 * @param removePunctuation Whether to remove punctuation before finding the first word
 * @return The first word of the String
 */
public static final String firstWord(String s, boolean trim, boolean removePunctuation) {
	String stringCopy = s;
	if(trim) {
		stringCopy = stringCopy.trim();
	}
	if(removePunctuation) {
		stringCopy = removePunctuation(stringCopy);
	}
	int index = stringCopy.indexOf(' ');
	String firstWord = "";
	if(!hasMultipleWords(stringCopy)) {
		firstWord = stringCopy;
	} else {
		firstWord = stringCopy.substring(0, index);
	}
	return firstWord;
}


/**
 * Returns the last word of the String, if the String is only one word, will return the string
 * @param s The String itself
 * @param trim Whether to trim the String before finding the last word
 * @param removePunctuation Whether to remove punctuation before finding the last word
 * @return The last word of the String
 */
public static final String lastWord(String s, boolean trim, boolean removePunctuation) {
	String stringCopy = s;
	if(trim) {
		stringCopy = stringCopy.trim();
	}
	if(removePunctuation) {
		stringCopy = removePunctuation(stringCopy);
	}
	int index = stringCopy.lastIndexOf(' ');
	String lastWord = "";
	if(!hasMultipleWords(stringCopy)) {
		lastWord = stringCopy;
	} else {
		lastWord = stringCopy.substring(index + 1);
	}
	return lastWord;
}

/**
 * Tells whether the String has multiple words
 * @param s The String itself
 * @return Whether the String has multiple words
 */
public static boolean hasMultipleWords(String s) {
	String copy = s.trim();
	return copy.indexOf(' ') != -1;
}

/**
 * Separates a String into each word in the string
 * @param s The String
 * @return An ArrayList&lt;String&gt; containing the words
 */
public static final ArrayList<String> wordsOfStringArrayList(String s) {
	ArrayList<String> list = new ArrayList<>(); 
	String temp = removePunctuation(s).trim();
	while(hasMultipleWords(temp)) {
		String word = firstWord(temp, true, true);
		list.add(word);
		int index = word.length();
		if(temp.charAt(index) == ' ') {
			index++;
		}
		temp = temp.substring(index);
	}
	list.add(temp);
	return list;
}

/**
 * Separates a String into each word in the string
 * @param s The String
 * @return A String[] containing the words
 */
public static final String[] wordsOfStringArray(String s) {
	ArrayList<String> list = wordsOfStringArrayList(s);
	String[] array = new String[list.size()];
	for(int i = 0; i < array.length; i++) {
		array[i] = list.get(i);
	}
	return array;
}
	
/**
 * Checks if a String contains another String <strong>Case Sensitive</strong>
 * @param initial The base String
 * @param check The String to check if in the base
 * @return Whether check is in Initial
 */
public static boolean containsString(String initial, String check) {
	return initial.indexOf(check) >= 0;
}

/**
 * Checks if a String contains another String <strong>Case Insensitive</strong>
 * @param initial The base String
 * @param check The String to check if in the base
 * @return Whether check is in Initial
 */
public static boolean containsStringIgnoreCase(String initial, String check) {
	String initLower = initial.toLowerCase();
	String checkLower = check.toLowerCase();
	return containsString(initLower, checkLower);
}