equalstest.java

this is my java Test

import java.util.*;
public class EqualsTest
{
	public static void main(String[] args)
	{
		Employee alice1=new Employee("Alice Adams",75000,1987,12,15);
		Employee alice2=alice1;
		Employee alice3=new Employee("Alice Adams",75000,1987,12,15);
		Employee bob=new Employee("Bob Brandson",50000,1989,10,1);
		System.out.println("alice1==alice2:"+(alice1==alice2));
				System.out.println("alice1==alice3:"+(alice1==alice3));
				System.out.println("alice1.equals(alice3):"+alice1.equals(alice3));
				System.out.println("bob.toString():"+bob);
				Manager carl=new Manager("Carl Cracker",80000,1987,12,15);
				Manager boss=new Manager("Carl Cracker",80000,1987,12,15);
				boss.setBonus(5000);
				System.out.println("boss.toString():"+boss);
				System.out.println("Carl.equals(boss):"+carl.equals(boss));
				System.out.println("alice1.hashCode():"+alice1.hashCode());
				System.out.println("alice3.hashCode():"+alice3.hashCode());	
				System.out.println("bob.hashCode():"+bob.hashCode());
				System.out.println("carl.hashCode():"+carl.hashCode());
			}
}
class Employee
{
	public Employee(String n,double s,int year,int month,int day)
	{
		name=n;
		salary=s;
		GregorianCalendar calender=new GregorianCalendar(year,month-1,day);
		hireDay=calender.getTime();
	}
	public String getName()
	{return name;
	}
	public double getSalary()
	{return salary;
	}
	public Date getHireDay()
	{return hireDay;
	}
	public void raiseSalary(double byPercent)
	{
		double raise=salary*byPercent/100;
		salary+=raise;
	}
	public boolean equals(Object otherObject)
	{
		if(this==otherObject) return true;
		if(getClass()!=otherObject.getClass())
		return false;
		Employee other =(Employee) otherObject;
		return name.equals(other.name)&&salary==other.salary&&hireDay.equals(other.hireDay);
	}
	public int hashCode()
	{
		return 7*name.hashCode()+11*new Double(salary).hashCode()+13*hireDay.hashCode();
	}
	public String toString()
	{
		return getClass().getName()+"[name="+name+",salary="+salary+",hireDay="+hireDay+"]";
	}
	private String name;
	private double salary;
	private Date hireDay;
}
class Manager extends Employee
{
	public Manager(String n,double s,int year,int month,int day)
	{
		super(n,s,year,month,day);
		bonus=0;
	}
	public double getSalary()
	{
		double baseSalary=super.getSalary();
		return baseSalary+bonus;
	}
	public void setBonus(double b)
	{bonus=b;
	}
	public boolean equals(Object otherObject)
	{
		if(!super.equals(otherObject)) return false;
		Manager other=(Manager) otherObject;
		return bonus==other.bonus;
	}
	public int hashCode()
	{
		return super.hashCode()+17*new Double(bonus).hashCode();
	}
	public String toString()
{
	return super.toString()+"[bonus="+bonus+"]";
}
private double bonus;
}