Complete the lab: lab-java-standard-input-and-classes

lab-java-standard-input-and-classes/.gitignore

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+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+.kotlin
+
+### IntelliJ IDEA ###
+.idea/modules.xml
+.idea/jarRepositories.xml
+.idea/compiler.xml
+.idea/libraries/
+*.iws
+*.iml
+*.ipr
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store

lab-java-standard-input-and-classes/employees.txt

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+Name: Alice Smith, Email: [email protected], Age: 30, Salary: 70000.0
+Name: Bob Jones, Email: [email protected], Age: 35, Salary: 80000.0
+Name: Charlie Brown, Email: [email protected], Age: 28, Salary: 60000.0
+Name: Dana White, Email: [email protected], Age: 40, Salary: 75000.0
+Name: Eve Adams, Email: [email protected], Age: 45, Salary: 90000.0
+Name: Frank Wright, Email: [email protected], Age: 50, Salary: 85000.0
+Name: Grace Lee, Email: [email protected], Age: 32, Salary: 72000.0
+Name: Harry Styles, Email: [email protected], Age: 27, Salary: 68000.0
+Name: Ivy Green, Email: [email protected], Age: 22, Salary: 20000.0
+Name: Jack Frost, Email: [email protected], Age: 24, Salary: 15000.0

lab-java-standard-input-and-classes/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>org.example</groupId>
+    <artifactId>lab-java-standard-input-and-classes</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <maven.compiler.source>21</maven.compiler.source>
+        <maven.compiler.target>21</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+</project>

lab-java-standard-input-and-classes/src/main/java/org/example/Employee.java

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+package org.example;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class Employee {
+    protected String name;
+    protected String email;
+    protected int age;
+    protected double salary;
+
+    public Employee(String name, String email, int age, double salary) {
+        this.name = name;
+        this.email = email;
+        this.age = age;
+        this.salary = salary;
+    }
+
+    public void setAge(int age){
+        if (age <= 18){
+            System.err.println("Age must be 18 or over!");
+            return;
+        }
+        this.age = age;
+    }
+    public void setSalary(double salary){
+        if (salary < 0){
+            System.err.println("Salary must be positive!");
+            return;
+        }
+        this.salary = salary;
+    }
+    public void setTitle(String name){
+        if(name == null || name.isBlank()){
+            System.out.println(" [REJECTED] Name cannot be null or blank.");
+            return;
+        }
+        this.name = name;
+    }
+    public void setEmail(String email){
+        if(isValidEmail(email)){
+            System.out.println(" [REJECTED] Please enter a valid email adress.");
+            return;
+        }
+        this.email = email;
+    }
+    public int getAge(){
+        return age;
+    }
+    public String getEmail(){
+        return email;
+    }
+    public String getName(){ return name; }
+    public double getSalary(){
+        return salary;
+    }
+
+    public boolean isValidEmail(String email) {
+        String emailRegex = "^[A-Za-z0-9+_.-]+@[A-Za-z0-9.-]+$";
+        Pattern pattern = Pattern.compile(emailRegex);
+        Matcher matcher = pattern.matcher(email);
+        return matcher.matches();
+    }
+    @Override
+    public String toString() {
+        return "Name: " + name + ", Email: " + email + ", Age: " + age + ", Salary: " + salary;
+    }
+}

lab-java-standard-input-and-classes/src/main/java/org/example/Intern.java

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+package org.example;
+
+public class Intern extends Employee{
+    private static final double MAX_SALARY = 20000;
+
+    public Intern(String name, String email, int age, double salary) {
+        super(name, email, age, validateSalary(salary));
+    }
+
+    public static double validateSalary(double salary){
+        if (salary < 0){
+            throw new IllegalArgumentException("Salary must be positive1");
+        } else if (salary > MAX_SALARY) {
+            throw new IllegalArgumentException("Salary exceeds the maximum intern salary limit of " + MAX_SALARY);
+        }
+        return salary;
+    }
+}

lab-java-standard-input-and-classes/src/main/java/org/example/Main.java

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+package org.example;
+
+import java.io.BufferedWriter;
+import java.io.FileWriter;
+import java.io.IOException;
+
+public class Main {
+    public static void main(String[] args) {
+        Employee employee = new Employee("Susan", "[email protected]", 23, 55000);
+        System.out.println(employee);
+
+        Intern intern = new Intern("Alice", "[email protected]", 19, 25000);
+        System.out.println(intern);
+
+        Employee[] employees = {
+                new Employee("Alice Smith", "[email protected]", 30, 70000),
+                new Employee("Bob Jones", "[email protected]", 35, 80000),
+                new Employee("Charlie Brown", "[email protected]", 28, 60000),
+                new Employee("Dana White", "[email protected]", 40, 75000),
+                new Employee("Eve Adams", "[email protected]", 45, 90000),
+                new Employee("Frank Wright", "[email protected]", 50, 85000),
+                new Employee("Grace Lee", "[email protected]", 32, 72000),
+                new Employee("Harry Styles", "[email protected]", 27, 68000),
+                new Intern("Ivy Green", "[email protected]", 22, 20000), // Intern
+                new Intern("Jack Frost", "[email protected]", 24, 15000), // Intern
+        };
+        try (BufferedWriter writer = new BufferedWriter(new FileWriter("employees.txt"))) {
+            for (Employee emp : employees) {
+                writer.write(emp.toString() + "\n");
+            }
+        } catch (IOException e) {
+            System.err.println("An error occurred while writing to the file: " + e.getMessage());
+        }
+    }
+}