Lab4

.gitignore

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+### IntelliJ IDEA ###
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store

Main.java

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+//TIP To <b>Run</b> code, press <shortcut actionId="Run"/> or
+// click the <icon src="AllIcons.Actions.Execute"/> icon in the gutter.
+public class Main {
+    public static void main(String[] args) {
+        //TIP Press <shortcut actionId="ShowIntentionActions"/> with your caret at the highlighted text
+        // to see how IntelliJ IDEA suggests fixing it.
+        System.out.printf("Hello and welcome!");
+
+        for (int i = 1; i <= 5; i++) {
+            //TIP Press <shortcut actionId="Debug"/> to start debugging your code. We have set one <icon src="AllIcons.Debugger.Db_set_breakpoint"/> breakpoint
+            // for you, but you can always add more by pressing <shortcut actionId="ToggleLineBreakpoint"/>.
+            System.out.println("i = " + i);
+        }
+    }
+}

Person.java

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+import java.util.Objects;
+
+public class Person {
+    private int id;
+    private String name;
+    private int age;
+    private String occupation;
+
+    public Person(int id, String name, int age, String occupation) {
+        this.id = id;
+        this.name = name;
+        this.age = age;
+        this.occupation = occupation;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    public String getOccupation() {
+        return occupation;
+    }
+
+    public void setAge(int age) {
+        if (age < 0) {
+            throw new IllegalArgumentException("Age cannot be less than 0");
+        }
+        this.age = age;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) return true;
+        if (obj == null || getClass() != obj.getClass()) return false;
+        Person person = (Person) obj;
+        return age == person.age &&
+                name.equals(person.name) &&
+                occupation.equals(person.occupation);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(name, age, occupation);
+    }
+
+    @Override
+    public String toString() {
+        return String.format("ID: %d, Name: %s, Age: %d, Occupation: %s", id, name, age, occupation);
+    }
+}
+
+

PersonTest.java

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+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.*;
+
+public class PersonTest {
+
+    @Test
+    public void testSetAgeThrowsException() {
+        Person person = new Person(1, "John Doe", 25, "Engineer");
+        Exception exception = assertThrows(IllegalArgumentException.class, () -> {
+            person.setAge(-1);
+        });
+
+        String expectedMessage = "Age cannot be less than 0";
+        String actualMessage = exception.getMessage();
+
+        assertTrue(actualMessage.contains(expectedMessage));
+    }
+
+    @Test
+    public void testFindByNameSuccess() {
+        PersonsList personsList = new PersonsList();
+        Person person = new Person(1, "John Doe", 25, "Engineer");
+        personsList.addPerson(person);
+
+        assertEquals(person, personsList.findByName("John Doe"));
+    }
+
+    @Test
+    public void testFindByNameThrowsException() {
+        PersonsList personsList = new PersonsList();
+
+        Exception exception = assertThrows(IllegalArgumentException.class, () -> {
+            personsList.findByName("JohnDoe");
+        });
+
+        String expectedMessage = "Name must be formatted as 'firstName lastName'";
+        String actualMessage = exception.getMessage();
+
+        assertTrue(actualMessage.contains(expectedMessage));
+    }
+
+    @Test
+    public void testClonePerson() {
+        Person original = new Person(1, "John Doe", 25, "Engineer");
+        PersonsList personsList = new PersonsList();
+        Person clone = personsList.clone(original, 2);
+
+        assertEquals(original.getName(), clone.getName());
+        assertEquals(original.getAge(), clone.getAge());
+        assertEquals(original.getOccupation(), clone.getOccupation());
+        assertNotEquals(original.getId(), clone.getId());
+    }
+}
+
+

PersonsList.java

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+import java.io.FileWriter;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Pattern;
+
+public class PersonsList {
+    private List<Person> persons = new ArrayList<>();
+
+    public void addPerson(Person person) {
+        persons.add(person);
+    }
+
+    public Person findByName(String name) {
+        if (!Pattern.matches("^[A-Za-z]+ [A-Za-z]+$", name)) {
+            throw new IllegalArgumentException("Name must be formatted as 'firstName lastName'");
+        }
+        for (Person person : persons) {
+            if (person.getName().equals(name)) {
+                return person;
+            }
+        }
+        return null;
+    }
+
+    public Person clone(Person person, int newId) {
+        return new Person(newId, person.getName(), person.getAge(), person.getOccupation());
+    }
+
+    public void writePersonToFile(Person person, String fileName) {
+        try (FileWriter writer = new FileWriter(fileName)) {
+            writer.write(person.toString());
+        } catch (IOException e) {
+            System.err.println("Error writing to file: " + e.getMessage());
+        }
+    }
+}
+
+

src/Main.java

@@ -0,0 +1,15 @@
+//TIP To <b>Run</b> code, press <shortcut actionId="Run"/> or
+// click the <icon src="AllIcons.Actions.Execute"/> icon in the gutter.
+public class Main {
+    public static void main(String[] args) {
+        //TIP Press <shortcut actionId="ShowIntentionActions"/> with your caret at the highlighted text
+        // to see how IntelliJ IDEA suggests fixing it.
+        System.out.printf("Hello and welcome!");
+
+        for (int i = 1; i <= 5; i++) {
+            //TIP Press <shortcut actionId="Debug"/> to start debugging your code. We have set one <icon src="AllIcons.Debugger.Db_set_breakpoint"/> breakpoint
+            // for you, but you can always add more by pressing <shortcut actionId="ToggleLineBreakpoint"/>.
+            System.out.println("i = " + i);
+        }
+    }
+}

src/Person.java

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+import java.util.Objects;
+
+public class Person {
+    private int id;
+    private String name;
+    private int age;
+    private String occupation;
+
+    public Person(int id, String name, int age, String occupation) {
+        this.id = id;
+        this.name = name;
+        this.age = age;
+        this.occupation = occupation;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    public String getOccupation() {
+        return occupation;
+    }
+
+    public void setAge(int age) {
+        if (age < 0) {
+            throw new IllegalArgumentException("Age cannot be less than 0");
+        }
+        this.age = age;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) return true;
+        if (obj == null || getClass() != obj.getClass()) return false;
+        Person person = (Person) obj;
+        return age == person.age &&
+                name.equals(person.name) &&
+                occupation.equals(person.occupation);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(name, age, occupation);
+    }
+
+    @Override
+    public String toString() {
+        return String.format("ID: %d, Name: %s, Age: %d, Occupation: %s", id, name, age, occupation);
+    }
+}
+
+

src/PersonTest.java

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+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.*;
+
+public class PersonTest {
+
+    @Test
+    public void testSetAgeThrowsException() {
+        Person person = new Person(1, "John Doe", 25, "Engineer");
+        Exception exception = assertThrows(IllegalArgumentException.class, () -> {
+            person.setAge(-1);
+        });
+
+        String expectedMessage = "Age cannot be less than 0";
+        String actualMessage = exception.getMessage();
+
+        assertTrue(actualMessage.contains(expectedMessage));
+    }
+
+    @Test
+    public void testFindByNameSuccess() {
+        PersonsList personsList = new PersonsList();
+        Person person = new Person(1, "John Doe", 25, "Engineer");
+        personsList.addPerson(person);
+
+        assertEquals(person, personsList.findByName("John Doe"));
+    }
+
+    @Test
+    public void testFindByNameThrowsException() {
+        PersonsList personsList = new PersonsList();
+
+        Exception exception = assertThrows(IllegalArgumentException.class, () -> {
+            personsList.findByName("JohnDoe");
+        });
+
+        String expectedMessage = "Name must be formatted as 'firstName lastName'";
+        String actualMessage = exception.getMessage();
+
+        assertTrue(actualMessage.contains(expectedMessage));
+    }
+
+    @Test
+    public void testClonePerson() {
+        Person original = new Person(1, "John Doe", 25, "Engineer");
+        PersonsList personsList = new PersonsList();
+        Person clone = personsList.clone(original, 2);
+
+        assertEquals(original.getName(), clone.getName());
+        assertEquals(original.getAge(), clone.getAge());
+        assertEquals(original.getOccupation(), clone.getOccupation());
+        assertNotEquals(original.getId(), clone.getId());
+    }
+}
+
+

src/PersonsList.java

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+import java.io.FileWriter;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Pattern;
+
+public class PersonsList {
+    private List<Person> persons = new ArrayList<>();
+
+    public void addPerson(Person person) {
+        persons.add(person);
+    }
+
+    public Person findByName(String name) {
+        if (!Pattern.matches("^[A-Za-z]+ [A-Za-z]+$", name)) {
+            throw new IllegalArgumentException("Name must be formatted as 'firstName lastName'");
+        }
+        for (Person person : persons) {
+            if (person.getName().equals(name)) {
+                return person;
+            }
+        }
+        return null;
+    }
+
+    public Person clone(Person person, int newId) {
+        return new Person(newId, person.getName(), person.getAge(), person.getOccupation());
+    }
+
+    public void writePersonToFile(Person person, String fileName) {
+        try (FileWriter writer = new FileWriter(fileName)) {
+            writer.write(person.toString());
+        } catch (IOException e) {
+            System.err.println("Error writing to file: " + e.getMessage());
+        }
+    }
+}
+
+