1. import java.util.Scanner;
2. import java.io.FileWriter;
3. import java.io.IOException;
4.  
5. public class Persons {
6.     private String firstName;
7.     private String lastName;
8.     private String age;
9.     private String phoneNumber;
10.     private String apt;
11.  
12.     public Persons(String firstName, String lastName, String age, String phoneNumber, String apt) {
13.         this.firstName = firstName;
14.         this.lastName = lastName;
15.         this.age = age;
16.         this.phoneNumber = phoneNumber;
17.         this.apt = apt;
18.     }
19.  
20.     public String getFirstName() {
21.         return firstName;
22.     }
23.  
24.     public void setFirstName(String firstName) {
25.         this.firstName = firstName;
26.     }
27.  
28.     public String getLastName() {
29.         return lastName;
30.     }
31.  
32.     public void setLastName(String lastName) {
33.         this.lastName = lastName;
34.     }
35.  
36.     public String getAge() {
37.         return age;
38.     }
39.  
40.     public void setAge(String age) {
41.         this.age = age;
42.     }
43.  
44.     public String getPhoneNumber() {
45.         return phoneNumber;
46.     }
47.  
48.     public void setPhoneNumber(String phoneNumber) {
49.         this.phoneNumber = phoneNumber;
50.     }
51.  
52.     public String getApt() {
53.         return apt;
54.     }
55.  
56.     public void setApt(String apt) {
57.         this.apt = apt;
58.     }
59.  
60.     public static void main(String[] args) {
61.         Scanner scanner = new Scanner(System.in);
62.  
63.         // Creating an array of Persons objects and providing information for 10 persons
64.         Persons[] personsArray = new Persons[10];
65.         personsArray[0] = new Persons("John", "Doe", "30", "1234567890", "101");
66.         personsArray[1] = new Persons("Khoa", "Tran", "56", "234234234", "234");
67.         // Add information for the remaining persons...
68.  
69.         // Options menu
70.         System.out.println("Options:");
71.         System.out.println("1. Print all persons' information to output file");
72.         System.out.println("2. Find a person by last name");
73.  
74.         // Get user choice
75.         System.out.print("Enter your choice (1 or 2): ");
76.         int choice = scanner.nextInt();
77.         scanner.nextLine(); // Consume the newline character
78.  
79.         // Perform action based on user choice
80.         switch (choice) {
81.             case 1:
82.                 printAllPersonsInfo(personsArray);
83.                 break;
84.             case 2:
85.                 findPersonByLastName(personsArray);
86.                 break;
87.             default:
88.                 System.out.println("Invalid choice. Exiting program.");
89.                 break;
90.         }
91.  
92.         // Closing the scanner
93.         scanner.close();
94.     }
95.  
96.     private static void printAllPersonsInfo(Persons[] personsArray) {
97.         FileWriter outputFile = null;
98.         try {
99.             outputFile = new FileWriter("report.txt");
100.  
101.             for (Persons person : personsArray) {
102.                 if (person != null) {
103.                     printPersonInfo(person, outputFile);
104.                 }
105.             }
106.  
107.             System.out.println("All the info has been print out to the report file!");
108.         } catch (IOException e) {
109.             System.out.println("Error creating the output file: " + e.getMessage());
110.         } finally {
111.             // Closing the output file
112.             if (outputFile != null) {
113.                 try {
114.                     outputFile.close();
115.                 } catch (IOException e) {
116.                     System.out.println("Error closing the output file: " + e.getMessage());
117.                 }
118.             }
119.         }
120.     }
121.  
122.     private static void findPersonByLastName(Persons[] personsArray) {
123.         Scanner scanner = new Scanner(System.in);
124.         boolean personFound = false;
125.  
126.         System.out.print("Enter a last name to search: ");
127.         String searchLastName = scanner.nextLine();
128.  
129.         FileWriter outputFile = null;
130.  
131.         for (Persons person : personsArray) {
132.             if (person != null && searchLastName.equalsIgnoreCase(person.getLastName())) {
133.                 personFound = true;
134.                 printPersonInfo(person, null); // Do not write to output file for individual search
135.  
136.                 try {
137.                     // Writing the information to the output file
138.                     outputFile = new FileWriter("fileReport.txt", true);
139.                     outputFile.write("Person found!\n");
140.                     outputFile.write("First Name: " + person.getFirstName() + "\n");
141.                     outputFile.write("Last Name: " + person.getLastName() + "\n");
142.                     outputFile.write("Age: " + person.getAge() + "\n");
143.                     outputFile.write("Phone Number: " + person.getPhoneNumber() + "\n");
144.                     outputFile.write("Apartment: " + person.getApt() + "\n");
145.                     System.out.println("Your person info has been print out to the output file!");
146.                 } catch (IOException e) {
147.                     System.out.println("Error writing to the output file: " + e.getMessage());
148.                 } finally {
149.                     if (outputFile != null) {
150.                         try {
151.                             outputFile.close();
152.                         } catch (IOException e) {
153.                             System.out.println("Error closing the output file: " + e.getMessage());
154.                         }
155.                     }
156.                 }
157.  
158.                 break; // Exit the loop once a person is found
159.             }
160.         }
161.  
162.         if (!personFound) {
163.             System.out.println("Person not found with the entered last name.");
164.         }
165.  
166.         // Closing the scanner
167.         scanner.close();
168.     }
169.  
170.     private static void printPersonInfo(Persons person, FileWriter outputFile) {
171.         System.out.println("Person found!");
172.         System.out.println("First Name: " + person.getFirstName());
173.         System.out.println("Last Name: " + person.getLastName());
174.         System.out.println("Age: " + person.getAge());
175.         System.out.println("Phone Number: " + person.getPhoneNumber());
176.         System.out.println("Apartment: " + person.getApt());
177.  
178.         if (outputFile != null) {
179.             try {
180.                 // Writing the information to the output file
181.                 outputFile.write("Person found!\n");
182.                 outputFile.write("First Name: " + person.getFirstName() + "\n");
183.                 outputFile.write("Last Name: " + person.getLastName() + "\n");
184.                 outputFile.write("Age: " + person.getAge() + "\n");
185.                 outputFile.write("Phone Number: " + person.getPhoneNumber() + "\n");
186.                 outputFile.write("Apartment: " + person.getApt() + "\n");
187.             } catch (IOException e) {
188.                 System.out.println("Error writing to the output file: " + e.getMessage());
189.             }
190.         }
191.     }
192. }
193.