类之间的相互继承

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class Car {
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    private String name;
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    private double price;
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    private Person person;
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    public Car (String name , double price){
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        this.name = name ;
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        this.price = price;
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    }
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    public void setPerson(Person p){
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        this.person = p;
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    }
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    public Person getPerson(){
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        return this.person;
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    }
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    public String getInfo(){
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        return "car name :" +this.name +", car price: " + this.price;
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    }
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}
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class Person{
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    private String name;
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    private int age;
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    private Car car;
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    public Person(String name , int age){
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        this.name= name ;
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        this.age = age;
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    }
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    public void setCar(Car car){
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        this.car = car;
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    }
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    public Car getCar(){
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        return this.car;
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    }
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    public String getInfo(){
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        return "person name :" +this.name+", person age:" +this.age;
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    }
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}
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public class ArrayDemo{
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    public static void main(String args []){
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        Person p1 =new Person("cirry", 18);
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        Car c1 =new Car("audi", 400000);
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        p1.setCar(c1);
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        c1.setPerson(p1);
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        System.out.println(p1.getCar().getInfo());
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        System.out.println(c1.getPerson().getInfo());
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    }
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}

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class Dept{
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    private String name;
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    private String loc;
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    private Emp emps [];    // 所有员工
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    public Dept(String name , String loc){
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        this.name = name ;
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        this.loc = loc;
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    }
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    public void setEmps(Emp [] emps){
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        this.emps = emps;
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    }
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    public Emp [] getEmps(){
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        return this.emps;
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    }
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    public String getInfo(){
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        return "dept name:"+this.name+", dept loc"+this.loc;
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    }
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}
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class Emp{
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    private String name;
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    private int age;
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    private Dept dept;    //所属部门
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    private Emp mgr;    //所属领导
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    public Emp(String name , int age){
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        this.name = name ;
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        this.age = age;
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    }
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    public void setDept(Dept dept){
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        this.dept =dept;
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    }
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    public void setMgr(Emp mgr){
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        this.mgr = mgr;
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    }
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    public Dept getDept(){
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        return this.dept;
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    }
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    public Emp getMgr(){
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        return this.mgr;
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    }
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    public String getInfo(){
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        return "雇员姓名 :" +this.name+",雇员年龄 :"+this.age;
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    }
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}
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public class ArrayDemo{
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    public static void main(String args []){
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        Dept dept = new Dept("财务部","合肥");
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        Emp empA = new Emp("菜菜",18);
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        Emp empB = new Emp("学学",18);
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        Emp empC = new Emp("瑞瑞",18);
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        empA.setDept(dept);
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        empB.setDept(dept);
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        empC.setDept(dept);
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        empA.setMgr(empB);
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        empB.setMgr(empC);
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        dept.setEmps(new Emp []{empA,empB,empC});
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        System.out.println(dept.getInfo());
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        for(int x = 0 ; x < dept.getEmps().length; x++){
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            System.out.println("\t|-"+dept.getEmps()[x].getInfo());
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            if(dept.getEmps()[x].getMgr()!= null)
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            System.out.println("\t\t|-"+dept.getEmps()[x].getMgr().getInfo());
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        }
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    }
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}

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class Person{
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    private String name;
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    private int age;
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    public Person(String name , int age){
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        this.name = name;
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        this.age = age;
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    }
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    @Override
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    public String toString(){
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        return "name:"+this.name+"age:"+this.age;
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    }
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}
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public class duotai{
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    public static void main(String args []){
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        Person per = new Person("dog", 18);
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        System.out.println(per);
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        System.out.println(per.toString());
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    }
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}