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