-m "java exceptions lab"

Person.java

@@ -0,0 +1,70 @@
+public class Person {
+    private int id;
+    private String name;
+    private int age;
+    private String occupation;
+
+    // Constructor
+    public Person(int id, String name, int age, String occupation) {
+        this.id = id;
+        this.name = name;
+        this.setAge(age);  // Using the setAge method to enforce age validation
+        this.occupation = occupation;
+    }
+
+    // Getter for id
+    public int getId() {
+        return id;
+    }
+
+    // Getter and Setter for name
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    // Getter and Setter for age
+    public int getAge() {
+        return age;
+    }
+
+    public void setAge(int age) {
+        if (age < 0) {
+            throw new IllegalArgumentException("Age cannot be less than 0");
+        }
+        this.age = age;
+    }
+
+    // Getter and Setter for occupation
+    public String getOccupation() {
+        return occupation;
+    }
+
+    public void setOccupation(String occupation) {
+        this.occupation = occupation;
+    }
+
+    // Equals method to compare Person objects excluding the id property
+    public boolean equals(Person other) {
+        if (other == null) {
+            return false;
+        }
+        return this.name.equals(other.name) && this.age == other.age && this.occupation.equals(other.occupation);
+    }
+
+    // Method to display Person details (optional, for testing purposes)
+    public void displayPerson() {
+        System.out.println("ID: " + id);
+        System.out.println("Name: " + name);
+        System.out.println("Age: " + age);
+        System.out.println("Occupation: " + occupation);
+    }
+    @Override
+    public String toString() {
+        return "Person{id=" + id + ", name='" + name + "', age=" + age + ", occupation='" + occupation + "'}";
+    }
+
+}

PersonsList.java

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+import java.util.ArrayList;
+import java.util.List;
+import java.io.FileWriter;
+import java.io.IOException;
+
+public class PersonsList {
+    private List<Person> persons;
+
+    // Constructor
+    public PersonsList() {
+        this.persons = new ArrayList<>();
+    }
+
+    // Method to add a Person to the list
+    public void addPerson(Person person) {
+        this.persons.add(person);
+    }
+
+    // Method to find a Person by name
+    public Person findByName(String name) {
+        if (!name.matches("[a-zA-Z]+ [a-zA-Z]+")) {
+            throw new IllegalArgumentException("Name must be formatted as 'firstName lastName'");
+        }
+        for (Person person : persons) {
+            if (person.getName().equals(name)) {
+                return person;
+            }
+        }
+        return null;  // Return null if no match is found
+    }
+
+    // Method to clone a Person with a new id
+    public Person clone(Person person, int newId) {
+        return new Person(newId, person.getName(), person.getAge(), person.getOccupation());
+    }
+
+    // Method to write Person information to a file
+    public void writePersonToFile(Person person, String filename) {
+        try (FileWriter writer = new FileWriter(filename)) {
+            writer.write(person.toString());
+        } catch (IOException e) {
+            System.err.println("An error occurred while writing to the file: " + e.getMessage());
+        }
+    }
+
+    // Main method for testing
+    public static void main(String[] args) {
+        PersonsList personsList = new PersonsList();
+
+        // Adding persons to the list
+        Person person1 = new Person(1, "John Doe", -1, "Software Engineer");
+        Person person2 = new Person(2, "Jane Smith", 28, "Doctor");
+        personsList.addPerson(person1);
+        personsList.addPerson(person2);
+
+        // Finding a person by name
+        try {
+            Person foundPerson = personsList.findByName("John Doe");
+            Person foundPerson2 = personsList.findByName("JohnDoe");
+            System.out.println("Found person: " + foundPerson);
+            System.out.println("Found person: " + foundPerson2);
+        } catch (IllegalArgumentException e) {
+            System.err.println(e.getMessage());
+        }
+
+        // Cloning a person with a new id
+        Person clonedPerson = personsList.clone(person1, 3);
+        System.out.println("Cloned person: " + clonedPerson);
+
+        // Writing a person to a file
+        personsList.writePersonToFile(person1, "person1.txt");
+    }
+}