1    package arraylistplay;
2    
3    import java.util.ArrayList;
4    import java.util.List;
5    
6    public class ArrayListProcessing {
7    
8        public static void main(String[] args) {
9    
10           // POINT A: ADD SOME STRINGS WHICH REPRESENT NAMES TO AN ARRAYLIST
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-Kallela, Akseli");
16           names.add("Zotto, Osvaldo");
17           names.add("Jeter, Derek");
18           names.add("Thompson, Nathan");
19   
20           // POINT B: CREATE AN ARRAYLIST OF JUST THE FIRST NAMES OF THE NAMES ARRAYLIST.
21           // USE A FOR LOOP TO PRINT OUT THE NAMES, SEPARATED BY SPACES.
22           List<String> firstNamesList = firstNames(names);
23           System.out.println("First Names: ");
24           for (String firstName : firstNamesList) {
25               System.out.println(firstName + " ");
26           }
27           System.out.println();
28   
29           // POINT C: USE STRING'S JOIN FUNCTION TO CREATE AND PRINT A STRING OF JUST THE
30           // FIRST NAMES OF THE NAMES ARRAYLIST WITH EACH NAME SEPARATED BY A COMMA.
31           String firstNames = String.join(",", firstNamesList);
32           System.out.println("First Names: " + firstNames);
33   
34           // POINT D: BY ANALOGY OF POINTS B AND C, PRINT A COMMA-SEPARATED LIST OF THE
35           // LAST NAMES IN THE NAMES ARRAYLIST
36           List<String> lastNamesList = lastNames(names);
37           String lastNames = String.join(",", lastNamesList);
38           System.out.println("Last Names: " + lastNames);
39   
40           // POINT E: PRINT A COMMA-SEPARATED LIST OF ALL UPPERCASE FIRST NAMES FROM THE
41           // LIST OF NAMES IN THE NAMES ARRAYLIST
42           List<String> upperCaseFirstNamesList = upperCaseNames(firstNames(names));
43           String upperCaseFirstNames = String.join(",", upperCaseFirstNamesList);
44           System.out.println("Uppercase First Names: " + upperCaseFirstNames);
45   
46           // POINT F: PRINT A COMMA-SEPARATED LIST OF ALL HYPHENATED LAST NAMES FROM THE
47           // LIST OF NAMES IN THE NAMES ARRAYLIST
48           List<String> hyphenatedLastNamesList = hyphenatedNames(lastNamesList);
49           String hyphenatedLastNames = String.join("-", hyphenatedLastNamesList);
50           System.out.println("Hyphenated Last Names: " + hyphenatedLastNames);
51   
52           // POINT G: PRINT THE INTEGER VALUE OF THE TOTAL LENGTH OF ALL THE NAMES
53           // IN THE NAMES ARRAYLIST
54           int totalLength = totalNameLength(names);
55           System.out.println("Total Length: " + totalLength);
56   
57           // POINT H: PRINT THE INTEGER VALUE OF THE TOTAL LENGTH OF ALL FIRST NAMES IN
58           // THE NAME ARRAYLIST
59           int totalFirstNamesLength = totalNameLength(firstNamesList);
60           System.out.println("Total Length of First Names: " + totalFirstNamesLength);
61   
62           // POINT I: PRINT THE INTEGER VALUE OF THE PRODUCT OF THE LENGTH OF ALL FIRST
63           // NAMES IN THE NAMES ARRAYLIST
64           int totalProduct = productOfNameLength(firstNamesList);
65           System.out.println("Product of the Length of All First Names: " + totalProduct);
66       }
67       private static String firstName(String directoryStyleName) {
68           int commaPosition = directoryStyleName.indexOf(",");
69           String firstName = directoryStyleName.substring(commaPosition+ 2);
70   
71           return firstName;
72       }
73   
74       private static List<String> firstNames(List<String> names) {
75           List<String> firsts = new ArrayList<>();
76           for ( String name : names ) {
77               firsts.add(firstName(name));
78           }
79           return firsts;
80       }
81   
82       private static String lastName(String directoryStyleName) {
83           int commaPosition = directoryStyleName.indexOf(",");
84           String lastName = directoryStyleName.substring(0,commaPosition);
85           return lastName;
86       }
87   
88       private static List<String> lastNames(List<String> names) {
89           List<String> lasts = new ArrayList<>();
90           for ( String name : names ) {
91               lasts.add(lastName(name));
92           }
93           return lasts;
94       }
95   
96       public static List<String> upperCaseNames(List<String> names) {
97           List<String> uppercases = new ArrayList<>();
98           for ( String name : names ) {
99               uppercases.add(name.toUpperCase());
100          }
101          return uppercases;
102      }
103  
104      private static List<String> hyphenatedNames(List<String> names) {
105          List<String> hyphenates = new ArrayList<>();
106          for ( String name : names ) {
107              if ( name.contains("-")) {
108                  hyphenates.add(name);
109              }
110          }
111          return hyphenates;
112      }
113  
114      public static int totalNameLength(List<String> names) {
115          int totalLength = 0;
116          for ( String name : names ) {
117              totalLength = totalLength + name.length();
118          }
119          return totalLength;
120      }
121  
122      public static int productOfNameLength(List<String> firstNames) {
123          int product = 1;
124          for ( String name : firstNames ) {
125              product = product*name.length();
126          }
127          return product;
128      }
129  }