I1. Strings, Recursion, Collections

import java.util.*;

public class myClass {

    public static void main(String[] args){

        // 1. String methods
        System.out.println("****************************************");
        System.out.println("1. String Methods");
        String[] words = {"funk", "chunk", "furry", "bacon", "clark"};
        for(String word : words){
            if(word.startsWith("fu")){
                System.out.println(word + " ---> starts with 'fu'");
            }
            if(word.endsWith("nk")){
                System.out.println(word + " ---> ends with 'nk'");
            }
            if(word.endsWith("k")){
                System.out.println(word + " ---> ends with 'k'");
            }
        }
        System.out.println();

        // 2. More string methods - startsWith, endsWith, indexOf, replace, toUpperCase, toLowerCase, trim
        System.out.println("****************************************");
        System.out.println("2. More string methods");
        String s1 = "buckyrobertsbuckyroberts";
        System.out.println(s1 + " ---> Index of 'k' = " + s1.indexOf('k'));
        System.out.println(s1 + " ---> Index of 'k' after index 5 = " + s1.indexOf('k', 5));
        System.out.println(s1 + " ---> Index of 'w' = " + s1.indexOf('w'));
        System.out.println(s1 + " ---> Index of 'rob' = " + s1.indexOf("rob"));
        String a = "Bacon";
        String b = "Monster";
        String c = "      Hello   ";
        System.out.println(a.concat(b));
        System.out.println(a.replace('c', 'R'));
        System.out.println(b.replace("nst", "us"));
        System.out.println(c);
        System.out.println(c.trim());
        System.out.println();

        // 3. Recursion
        System.out.println("****************************************");
        System.out.println("3. Recursion");
        System.out.println("Factorial(5) = " + fact(5));
        System.out.println("Factorial(6) = " + fact(6));
        System.out.println();

        // 4. Collections - add, size, get
        System.out.println("****************************************");
        System.out.println("4. Collections");
        String[] things = {"eggs", "lasers", "hats", "pie"};
        List<String> list = new ArrayList<String>();
        for(String thing : things){
            list.add(thing);
        }
        System.out.println(list);
        String[] more = {"lasers", "hats"};
        List<String> list2 = new ArrayList<String>();
        for(String y : more){
            list2.add(y);
        }
        System.out.println(list2);
        for(int i=0; i<list.size(); i++){
            System.out.printf("%s ", list.get(i));
        }
        System.out.println();
        editlist(list, list2);
        System.out.println(list);



    }   // END OF MAIN

    public static long fact(int n){
        if(n <= 1)
            return 1;
        else
            return n * fact(n-1);
    }

    public static void editlist(Collection<String> list1, Collection<String> list2){
        Iterator<String> it = list1.iterator();
        while(it.hasNext()){
            if(list2.contains(it.next())){
                it.remove();
            }
        }
    }

}   // END OF CLASS