Employee/EmployeeTest.java

Employee.java

import java.time.LocalDate;

public class Employee {
    // 3个字段,用来存放将要操作的数据
    private final String name;
    private double salary;
    private LocalDate hireDay;

    // 通过Generate...生成后修改
    public Employee(String name, double salary, int year, int month, int day) {
        this.name = name;
        this.salary = salary;
        hireDay = LocalDate.of(year, month, day);
    }

    // 通过Generate...生成即可
    public String getName() {
        return name;
    }

    public double getSalary() {
        return salary;
    }

    public LocalDate getHireDay() {
        return hireDay;
    }

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

EmployeeTest.java

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

        staff[0] = new Employee("张三", 1000, 2020, 3, 15);
        staff[1] = new Employee("李四", 2000, 2019, 9, 18);
        staff[2] = new Employee("王五", 5000, 2023, 1, 1);

        for (Employee e : staff) { // for each循环
            e.raiseSalary(5);

            String tmp = "name=" + e.getName() +
                    ", salary=" + e.getSalary() +
                    ", hireDay=" + e.getHireDay();
            System.out.println(tmp);
        }
    }
}

输出：

name=张三, salary=1050.0, hireDay=2020-03-15
name=李四, salary=2100.0, hireDay=2019-09-18
name=王五, salary=5250.0, hireDay=2023-01-01

计算时间差

import java.time.LocalDate;
import java.time.temporal.ChronoUnit;

public class MyTest {
    public static void main(String[] args) {
        LocalDate date1 = LocalDate.of(2023, 9, 23);
        System.out.println(date1); // => 2023-09-23
        LocalDate date2 = LocalDate.of(2024, 9, 22);
        System.out.println(date2); // => 2024-09-22
        // 计算天数差1
        long result1 = date2.toEpochDay() - date1.toEpochDay();
        // 计算天数差2
        long result2 = ChronoUnit.DAYS.between(date1, date2);
        // 计算月数差
        long result3 = ChronoUnit.MONTHS.between(date1, date2);
        System.out.println(result1); // => 365
        System.out.println(result2); // => 365
        System.out.println(result3); // => 11
        // 说明：23.9.23到24.9.23才算完整的12个月，23.9.23到24.9.22不足12个月，按11个月计算
    }
}

仅供参考，可采用其它任意方式。

Employee改进版_测试

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

        staff[0] = new Employee("张三", 1000, 2024, 8, 24);
        staff[1] = new Employee("李四", 1000, 2023, 9, 23);
        staff[2] = new Employee("王五", 1000, 2022, 9, 23);

        for (Employee e : staff) { // for each循环
            String tmp = "name=" + e.getName() +
                    ", 总报酬=" + e.getTotalSalary() +
                    ", 总天数=" + e.getDaysSinceHire();
            System.out.println(tmp);
        }
    }
}

输出（24年9月23日）：

name=张三, 总报酬=0.0, 总天数=30
name=李四, 总报酬=12000.0, 总天数=366
name=王五, 总报酬=24000.0, 总天数=731