1    // PROGRAM RO PREFORM SOME BASIC OPERATIONS ON A LIST OF STRING NAMES
2    package arraylists;
3    
4    import java.util.ArrayList;
5    import java.util.List;
6    
7    public class ArrayListProcessing {
8    
9        public static void main(String[] args) {
10           //POINT A: ADD SOME STRINGS WHICH REPRESENT NAMES TO AN ARRAY LIST
11           List<String> names = new ArrayList<>();
12           names.add("Holiday, Billie");
13           names.add("Claudel, Camille");
14           names.add("Picasso, Pablo");
15           names.add("Gallen-Kalela, Akseli ");
16           names.add("Zotto, Osvaldo");
17           names.add("Lovell, Owen");
18           names.add("Gomez, Selena");
19           names.add("Eilish, Billie");
20   
21   
22           //POINT B: CREATE AN ARRAYLIST OF JUST THE FIRST NAMES OF THE NAMES
23           List<String> firstNamesList = firstNames(names);
24   
25           System.out.print("First names: ");
26           for (String firstName : firstNamesList){
27               System.out.print(firstName + " ");
28           }
29           System.out.println();
30   
31           // POINT C: Use String’s join function to create and print a String of
32           // just the first names of the names ArrayList with each name
33           // separated by a comma.
34           String firstNames = String.join(", ", firstNamesList);
35           System.out.println("First names: " + firstNames);
36   
37           // point d; by analogy from point b and c, print a comma-separate
38           //list of the last names in the namse ArrayList.
39   
40           List<String> lastNamesList = lastNames(names);
41   
42           System.out.print("Last names: ");
43           for (String lastName : lastNamesList){
44               System.out.print(lastName + " ");
45           }
46           System.out.println();
47   
48           String lastNames = String.join(", ", lastNamesList);
49           System.out.println("Last names: " + lastNames);
50   
51           // POINT E: Print a comma-separated list of all uppercase first names
52           //from the list of names in the names ArrayList.
53           List<String> upperCaseFirstNamesList = upperCaseNames(firstNames(names));
54           String upperCaseFirstNames = String.join(", ", upperCaseFirstNamesList);
55           System.out.println("Uppercase first names: " + upperCaseFirstNames);
56   
57           //point f : print a comma seperated list of all hyphenated last names fomr the list
58          // of names in the namse Array List\
59           List<String> hyphenatedNamesList = hyphenatedNames(lastNames(names));
60           String hyphenatedNames = String.join(", ",hyphenatedNamesList);
61           System.out.println("Hyphenated names: " + hyphenatedNames);
62   
63           //point g : print the integer value of the total length of all names
64           //in the names ArrayList
65           int totalLength = totalNameLength(names);
66           System.out.println("Total length: " + totalLength);
67   
68           //point h: print the integer value of the total length of all first names in the names array list
69           int firstLength = totalfirstNameLength(names);
70           System.out.println("First Name length: " + firstLength);
71   
72           //point I: print the integer value of the product
73           //of the length of all the first names
74           //in the names array List
75           double productoff = productNames(names);
76           System.out.println(("Product Frist Names: " + productoff));
77   
78   
79   
80   }
81   
82       public static List<String> hyphenatedNames(List<String> names) {
83           List<String> hyphenateds = new ArrayList<>();
84           for(String name : names) {
85               if (name.contains("-")) {
86                   hyphenateds.add(name);
87               }
88           }
89           return hyphenateds;
90       }
91   
92   
93   
94       public static List<String> upperCaseNames(List<String> names){
95           List<String> uppercases = new ArrayList<>();
96           for (String name : names){uppercases.add(name.toUpperCase());
97           }return uppercases;
98       }
99   
100  
101      private static String firstName(String directoryStyleName) {
102          int positionOfComma = directoryStyleName.indexOf(",");
103          String firstName = directoryStyleName.substring(positionOfComma + 2);
104          return firstName;
105      }
106      private static List<String> firstNames(List<String> names){
107          List<String> firsts = new ArrayList<>();
108          for (String name : names){
109              firsts.add(firstName(name));
110          }
111          return firsts;
112      }
113  
114      private static String lastName(String directoryStyleName) {
115          int positionOfComma = directoryStyleName.indexOf(",");
116          String lastName = directoryStyleName.substring(0,positionOfComma);
117          return lastName;
118      }
119  
120  
121      private static List<String> lastNames(List<String> names){
122          List<String> lasts = new ArrayList<>();
123          for (String name : names){
124              lasts.add(lastName(name));
125          }
126          return lasts;
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 totalfirstNameLength(List<String> names) {
137          int totalfirstLength = 0;
138          for (String name : names) {
139              totalfirstLength = totalfirstLength + firstName(name).length();
140          }
141          return totalfirstLength;
142      }
143  
144      public static double productNames(List<String> names) {
145          double productofFirsts = 1;
146          for (String name : names) {
147              productofFirsts = productofFirsts * name.length();
148          }
149          return productofFirsts;
150      }
151  }
152