父类与子类举例

import java.time.LocalDate;

/**
 * Created by guipengfei on 2020/7/28 9:14
 */
public class Employee {
    private String name;
    private double salary;
    private LocalDate hireDay;

    /*带参数的构造函数*/
    public Employee(String name, double salary, int year, int month, int day)
    {
        this.name=name;
        this.salary=salary;
        this.hireDay=LocalDate.of(year,month,day);
    }

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

import java.time.LocalDate;

/**
 * Created by guipengfei on 2020/7/28 9:20
 */
public class Manager extends Employee{
    private double bonus;//manager类多了一个特殊属性bonus
    public Manager(String name, double salary, int year,int month,int day)
    {
        super(name,salary,year,month,day);//调用富力湾i的构造函数
        bonus=0;
    }
    public double getSalary()
    {
        double baseSalary=super.getSalary();//获取employee的基本工作
        baseSalary+=bonus;//基础工资再加上津贴
        return baseSalary;
    }
    public void setBonus(double bonus)
    {
        this.bonus=bonus;
    }
}

public class test
{

    public static void main(String args [])
    {
       Manager manager=new Manager("Mike",2500,2018,7,5);
       manager.setBonus(200);
       System.out.println(manager.getSalary());
    }

}