EmployeeDetails.java

import java.util.ArrayList;

class Employee {
	private String name;
	private int empID;
	private int yearsOfService;
	private int salary;
	private ArrayList<Certificate> certificates;
	
	public Employee(String name, int empID, int yearsOfService, int salary) {
		this.name= name;
		this.empID= empID;
		this.yearsOfService= yearsOfService;
		this.salary= salary;
		certificates= new ArrayList<Certificate>();
	}
	
	public String getName() {
		return this.name;
	}
	
	public int getEmpID() {
		return this.empID;
	}
	
	public int getYearsOfService() {
		return this.yearsOfService;
	}
	
	public int getSalary() {
		return this.salary;
	}
	
	public void setSalary(int salary) {
		this.salary= salary;
	}
	
	public void setYearsOfService(int yearsOfService) {
		this.yearsOfService= yearsOfService;
	}
	
	public void addCertification(int cid, String name, String desc) {
		this.certificates.add(new Certificate(cid, name, desc));
	}
	
	public ArrayList<Certificate> getCertifications() {
		return this.certificates;
	}
}

class Certificate {
	private int cID;
	private String cName;
	private String cDesc;
	
	Certificate(int cid, String name, String desc) {
		this.cID= cid;
		this.cName= name;
		this.cDesc= desc;
	}
	
	public int getID() {
		return this.cID;
	}
	
	public String getName() {
		return this.cName;
	}
	
	public String getDesc() {
		return this.cDesc;
	}
}

class Company {
	private ArrayList<Employee> emp;
	
	Company(){
		this.emp= new ArrayList<Employee>();
	}
	
	public void incrementSalaryOfEmployees() {
		for(int i=0; i<this.emp.size(); i++) {
			int years= emp.get(i).getYearsOfService();
			int salary= emp.get(i).getSalary();
			if (years>=1 && years<=4) {
				emp.get(i).setSalary((int)(1.10*salary));
			} else if (years<=10) {
				emp.get(i).setSalary((int)(1.20*salary));
			} else {
				emp.get(i).setSalary((int)(1.10*salary));
			}
		}
	}
	
	public void addNewEmployee(Employee e) {
		this.emp.add(e);
	}
	
	public ArrayList<Employee> getEmployees() {
		return this.emp;
	}
	
	public void listAllEmployees() {
		for(Employee e: this.emp) {
			System.out.println(e.getName());
			System.out.println(e.getEmpID());
			System.out.println(e.getSalary());
			System.out.println(e.getYearsOfService());
			ArrayList<Certificate> certs= e.getCertifications();
			if(certs.size()>0) {
				int idx=1;
				System.out.println("\nCertificates\n\n");
				for(Certificate c: certs) {
					System.out.println(idx+ "\tID "+ c.getID()+ "\n\tName: "+ c.getName()+ "\n\tDescription: "+ c.getDesc());
					idx++;
				}
			} else {
				System.out.println("No certificates");
			}
			System.out.println();
		}
	}
		
}

public class EmployeeDetails {
	public static void main(String []args) {
		Company com= new Company();
		Employee e1= new Employee("Barns", 1234, 3, 70000);
		Employee e2= new Employee("Jack", 2345, 10, 29000);
		e1.addCertification(1001, "Oracle Ceritified Java dev", "This certificate certifies the same");
		com.addNewEmployee(e1);
		com.addNewEmployee(e2);
		com.incrementSalaryOfEmployees();
		com.listAllEmployees();
	}
}