1    /* 
2     * A program to perform some basic operations on a list of String names 
3     * 
4     */
5    package arraylists;
6    
7    import java.util.ArrayList;
8    import java.util.List;
9    
10   public class ArrayListProcessing {
11   
12       public static void main(String[] args) {
13           //POINT A: Add some strings which represent names to an ArrayList.
14           List<String> names = new ArrayList<>();
15           names.add("Holiday, Billie");
16           names.add("Claudel, Camille");
17           names.add("Picasso, Pablo");
18           names.add("Gallen-Kallela, Akseli");
19           names.add("Zotto, Osvaldo");
20           names.add("Palta-Tito, Robert");
21           names.add("Arc, Juane");
22   
23           // POINT B: Create an ArrayList of just the first names of the names
24           //          ArrayList. Use a for loop to print out the names, separated
25           //          by spaces.
26           List<String> firstNamesList = firstNames(names);
27   
28           System.out.println("First names: ");
29           for (String firstName : firstNamesList) {
30               System.out.print(firstName + "");
31           }
32           System.out.println();
33   
34           // POINT C: Use String's join function to create and print a String of
35           //          just the first names of the names ArrayList with each
36           //          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
42           //          list of the last names in the names ArrayList
43           List<String> lastNamesList = lastNames(names);
44           String lastNames = String.join(", ", lastNamesList);
45   
46           System.out.println("Last names: " + lastNames);
47   
48           // POINT E: Print a comma-separated list of all uppercase first names
49           //          from the list of names in the names ArrayList.
50           List<String> upperCaseFirstNamesList = upperCaseNames(firstNames(names));
51           String upperCaseFirstNames = String.join(", ", upperCaseFirstNamesList);
52   
53           System.out.println("Uppercase first names: " + upperCaseFirstNames);
54   
55           // POINT F: Print a comma-separated list of all hyphenated first names
56           //          from the list of names in the names ArrayList.
57           List<String> hyphenatedLastNamesList = hyphenatedNames(lastNames(names));
58           String hyphenatedLastNames = String.join (", ", hyphenatedLastNamesList);
59   
60           System.out.println("Hyphenated last names: " + hyphenatedLastNames);
61   
62           // POINT G: Print the integer value of the total length of all names
63           //          in the names ArrayList
64           int totalLength = totalNameLength(names);
65   
66           System.out.println("Total Length: " + totalLength);
67   
68           // POINT H: Print the integer value of the total length of all
69           //          first names in the names ArrayList.
70           int firstNamesTotalLength = totalNameLength(firstNames(names));
71   
72           System.out.println("First names total length: " + firstNamesTotalLength);
73   
74           // POINT I: Print the integer value of the product of the length of
75           //          all first names in the names ArrayList.
76           int total = totalNameProduct(firstNames(names));
77   
78           System.out.println("First names total product: " + total);
79       }
80   
81       private static String firstName(String directoryStyleName) {
82   
83           int StyleCommaPosition = directoryStyleName.indexOf(",");
84           return directoryStyleName.substring(StyleCommaPosition + 2);
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   
98           int styleCommaPosition = directoryStyleName.indexOf(",");
99           return directoryStyleName.substring(0, styleCommaPosition);
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      public 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      public 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      public 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      public static int totalNameProduct(List<String> names) {
137          int total = 1;
138          for(String name : names) {
139              total = total * name.length();
140          }
141          return total;
142      }
143  }
144