Employee.java

// Employee.java 
import java.time.LocalDate;

//no public key word. Why?
class Employee 
{
   // three private Fields
   private String name;  // Has-A relationship
   private double salary;
   private LocalDate  hireDay; // HAS-A Relationship
   // one Constructor
   public Employee(String n, double s, int year, int month, int day)
   {
      name = n;
      salary = s;
      hireDay = LocalDate.of (year, month, day);
   }
	// 4 public Methods (3 accessors and 1 mutator)
   public String getName() // read only
   { 
       return name;
   }
   public double getSalary() // read only 
   {
      return salary;
   }
   public LocalDate getHireDay() // read only 
   {
      return hireDay;
   }
     public void raiseSalary(double byPercent) // update
      {
         double raise = salary * byPercent / 100;
          salary += raise;
      }
}

// EmployeeTest.java 
// import Employee; // error why? 

 // save as EmployeeTest.java
public class EmployeeTest 
{
   public static void main(String[] args)
   {
      // fill the staff array with three Employee objects
      Employee[] staff = new Employee[3];
      staff[0] = 
             new Employee("Carl Cracker", 75000, 1987, 12, 15);
      staff[1] = 
             new Employee("Harry Hacker", 50000, 1989, 10, 1);
      staff[2] = 
             new Employee("Tony Tester", 40000, 1990, 3, 15);
    	// raise everyone's salary by 5%
      for (Employee e : staff)
         e.raiseSalary(5);
      // print out information about all Employee objects
      for (Employee e : staff)
         System.out.println("name=" + e.getName() + ",salary=" + e.getSalary() + ", hireDay=" + e.getHireDay());
   }
}

 

 

 

왜 public 이 필요 없냐 Employee.java 에?

Employee.java와 EmployeTest.java 둘다 같은 default package 에 속하기 때문이다.

 

Note 3

 : main이 EmployeeTest.class에 있기 때문이다.