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            //POINT A: add some strings which represent names to an ArrayList.
10           List<String> names = new ArrayList<>();
11           names.add("Holiday, Billie");
12           names.add("Claudel, Camille");
13           names.add("Picasso, Pablo");
14           names.add("Gallen-Kallela, Akseli");
15           names.add("Zotto, Osvaldo");
16           names.add("Lennon, John");
17           names.add("Alighieri, Dante");
18   
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,
22           // separated by spaces.
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   
32           //POINT C: Use String's join function to create and print a String of
33           //just the first names of the names
34           // ArrayList with each name separated by a comma.
35           String firstNames = String.join(",", firstNamesList);
36           System.out.println("First names: " + firstNames);
37   
38           //Point D: By analogy from Points B and C, print a comma-separated list of the last names
39           //in the names ArrayList
40           List<String> lastNamesList = lastNames(names);
41           System.out.print("Last Names: ");
42           for (String lastName : lastNamesList) {
43               System.out.print(lastName + " ");
44           }
45           System.out.println();
46           String lastNames = String.join(",", lastNamesList);
47           System.out.println("Last names: " + lastNames);
48   
49           //POINT E:Print a comma-separated list of all uppercase first names from the list of names in the names ArrayList
50           List<String> upperCaseFirstNamesList = upperCaseNames(firstNames(names));
51           String upperCaseFirstNames = String.join(",", upperCaseFirstNamesList);
52           System.out.println("UpperCase First Names: " + upperCaseFirstNames);
53   
54   
55           //POINT F: Print a comma-separated list of all hyphenated last names from the list of names in the
56           // names ArrayList
57           List<String> hyphenatedNamesList = hyphenatedNames(names);
58           String hyphenatedNames = String.join(",", hyphenatedNamesList);
59           System.out.println(("Hyphenated names: " + hyphenatedNames));
60   
61           //POINT G: Print the integer value of the total length of all names in the names ArrayList
62           int totalLength = totalNameLength(names);
63           System.out.println("Total length: " + totalLength);
64   
65           //POINT H: Print the integer value of the total length
66           //of all first names in the names ArrayList
67           int totalFirstNamesLength = firstNameLength(firstNamesList);
68           System.out.println(("total first names length: " + totalFirstNamesLength));
69   
70           //POINT I: Print the integer value of the product of the
71           // length of all names in the names ArrayList
72           int totalLengthProduct = nameProduct(names);
73           System.out.println("the product of the length of all names in the ArrayList: "+totalLengthProduct);
74       }
75   
76       private static String firstName(String directoryStyleName) {
77   
78   
79           return (directoryStyleName.substring(directoryStyleName.lastIndexOf(" ")));
80       }
81   
82       private static List<String> firstNames(List<String> names) {
83           List<String> firsts = new ArrayList<>();
84           for (String name : names) {
85               firsts.add(firstName(name));
86           }
87           return firsts;
88       }
89   
90       private static String lastName(String directoryStyleName) {
91   
92           return (directoryStyleName.substring(0, directoryStyleName.indexOf(",")));
93       }
94   
95       private static List<String> lastNames(List<String> names) {
96           List<String> lasts = new ArrayList<>();
97           for (String name : names) {
98               lasts.add(lastName(name));
99           }
100          return lasts;
101      }
102  
103      public static List<String> upperCaseNames(List<String> names) {
104          List<String> uppercases = new ArrayList<>();
105          for (String name : names) {
106              uppercases.add(name.toUpperCase());
107          }
108          return uppercases;
109      }
110  
111      public static List<String> hyphenatedNames(List<String> names) {
112          List<String> hyphenateds = new ArrayList<>();
113          for (String name : names) {
114              if (name.contains("-")) {
115                  hyphenateds.add(name);
116              }
117          }
118          return hyphenateds;
119      }
120  
121      public static int totalNameLength(List<String> names) {
122          int totalLength = 0;
123          for (String name : names) {
124              totalLength = totalLength + name.length();
125          }
126          return totalLength;
127      }
128  
129      public static int firstNameLength(List<String> firstNames) {
130          int totalFirstNameLength = 0;
131          for (String firstName : firstNames) {
132              totalFirstNameLength = totalFirstNameLength + firstName.length();
133          }
134          return totalFirstNameLength;
135      }
136  
137      public static int nameProduct(List<String> names) {
138          int totalLength = 1;
139          for (String name : names) {
140              totalLength = totalLength * name.length() ;
141          }
142          return totalLength;
143      }
144  }
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