求助Exception in thread "main" java.lang.NullPointerException错误解决

dlnb526

///CoreJAVA 4-2

import java.time.*;

public class EmployeeTest
{
    public static void main(String[] args)
    {
        Employee[] staff = new Employee[3];

        staff[0] = new Employee("Carl Cracker",75000,1987,12,15);
        staff[1] = new Employee("Harry Havker",50000,1989,10,1);

        for(Employee e:staff)
            e.raiseSalary(5);
        for(Employee e:staff)
            System.out.println("name="+e.getName()+",salary="+e.getSalary()+",hireDay="+e.getHireDay());

    }
}

class Employee
{
    private String name;
    private double salary;
    private LocalDate hireDay;

    public Employee(String n,double s,int year,int month,int day)
    {
        name = n;
        salary = s;
        hireDay = LocalDate.of(year, month, day);

    }
    public String getName()
    {
        return name;
    }
    public double getSalary()
    {
        return salary;

    }
    public LocalDate getHireDay()
    {
        return hireDay;

    }
    public void raiseSalary(double byPercent)
    {
        double raise = salary*byPercent/100;
        salary += raise;
    }
}

错误如下

Exception in thread "main" java.lang.NullPointerException
        at EmployeeTest.main(EmployeeTest.java:15)

就是这里：

  for(Employee e:staff)
            e.raiseSalary(5);

可是没有需要赋值的地方了啊~~求各位大佬帮助

dlnb526

知道问题在哪了，少了一组数据