1    /* 
2     * A program to perform some basic operations on a list of String names. 
3     */
4    package arraylists;
5    
6    import java.util.ArrayList;
7    import java.util.List;
8    
9    
10   public class ArrayListProcessing {
11   
12       public static void main(String[] args) {
13   
14           // POINT A: Add some strings which represent names to an ArrayList.
15           List<String> names = new ArrayList<>();
16           names.add("Holiday, Billie");
17           names.add("Claudel, Camille");
18           names.add("Picasso, Pablo");
19           names.add("Gallen-Kallela, Akseli");
20           names.add("Zotto, Osvaldo");
21           names.add("Curry, Stephen");
22           names.add("Thompson, Klay");
23           names.add("Green, Draymond");
24           names.add("Russel, Diangelo");
25   
26   
27           // POINT B: Create an ArrayList of just the first name of the names ArrayList. use a for loop to print out the names, separated by spaces
28           List<String> firstNamesList = firstNames(names);
29   
30           System.out.print("First names: ");
31           for (String firstName : firstNamesList) {
32               System.out.print(firstName + " ");
33           }
34           System.out.println();
35   
36           // POINT C: Use String's join function to create and print a String of just the first name of hte names ArrayList with each name separated by a comma
37           String firstNames = String.join(", ", firstNamesList);
38   
39           System.out.println("First names: " + firstNames);
40   
41           // POINT D: By analogy from points B and C, print a comma-separated list of the last name in the names ArrayList
42           List<String> lastNamesList = lastNames(names);
43   
44           System.out.print("Last names: ");
45           for (String lastName : lastNamesList) {
46               System.out.print(lastName + " ");
47           }
48           System.out.println();
49   
50           String lastNames = String.join(", ", lastNamesList);
51   
52           System.out.println("Last names: " + lastNames);
53   
54           // POINT E: Print a comma-separated list of all uppercase first names from the list of names in the names ArrayList
55           List<String> upperCaseFirstNamesList = upperCaseNames(firstNames(names));
56           String upperCaseFirstNames = String.join(", ", upperCaseFirstNamesList);
57   
58           System.out.println("Uppercase first names: " + upperCaseFirstNames);
59   
60           // POINT F: Print a comma-separated list of all hyphenated last names from the list of names in the name ArrayList
61           List<String> hyphenatedNamesList = hyphenatedNames(names);
62           String hyphenatedNames = String.join(", ", hyphenatedNamesList);
63   
64           System.out.println("Hyphenated names: " + hyphenatedNames);
65   
66           // POINT G: Print the integer value of the total length of all names in the names ArrayList
67           int totalLength = totalNameLength(names);
68   
69           System.out.println("Total length: " + totalLength);
70   
71           // POINT H: Print the integer value of the total length of all first names in the names ArrayList
72           int totalFirstNameLength = totalNameLength(firstNames(names));
73   
74           System.out.println("Total first names length: " + totalFirstNameLength);
75   
76           // POINT I: Print the integer value of the product of the length of all first names in the names ArrayList
77           int totalLastNamesLength = totalNameLength(lastNames(names));
78   
79           System.out.print("Total last names length: " + totalLastNamesLength);
80       }
81       private static String firstName(String directoryStyleName) {
82           int firstComma = directoryStyleName.indexOf(",");
83           String firstName = directoryStyleName.substring(firstComma + 2);
84           return firstName;
85   
86       }
87   
88       private static List<String> firstNames(List<String> names) {
89           List<String> firsts = new ArrayList<>();
90           for (String name : names) {
91               firsts.add(firstName(name));
92           }
93           return firsts;
94       }
95   
96       private static String lastName(String directoryStyleName) {
97           int lastComma = directoryStyleName.indexOf(",");
98           String lastName = directoryStyleName.substring(0, lastComma);
99           return lastName;
100      }
101  
102      private static List<String> lastNames(List<String> names) {
103          List<String> lasts = new ArrayList<>();
104          for (String name : names) {
105              lasts.add(lastName(name));
106          }
107          return lasts;
108      }
109  
110      private static List<String> upperCaseNames(List<String> names) {
111          List<String> uppercases = new ArrayList<>();
112          for (String name : names){
113              uppercases.add(name.toUpperCase());
114          }
115          return uppercases;
116      }
117  
118      private static List<String> hyphenatedNames(List<String> names) {
119          List<String> hyphenateds = new ArrayList<>();
120          for (String name : names) {
121              if (name.contains("-")) {
122                  hyphenateds.add(name);
123              }
124          }
125          return hyphenateds;
126      }
127  
128      private static int totalNameLength(List<String> names) {
129          int totalLength = 0;
130          for(String name : names) {
131              totalLength = totalLength + name.length();
132          }
133          return totalLength;
134      }
135  
136  }
137  
138