java类中的自身关联（引用传递）

package asrfasf;

class Car{
	private String name;
	private double price;
	private People people;		//车属于一个人
	public Car(){}
	public Car(String name,double price){
		this.name=name;
		this.price=price;
	}
	public void setPeople(People people){
		this.people=people;
	}
	public People getPeople(){
		return this.people;
	}
	//set,get 略
	public String getInfo(){
		return "汽车型号："+this.name+"、价格"+this.price;
	}
}
class People{
	private String name;
	private int age;
	private Car car;  //自定义属性，一个人有一辆车
	private People children []; // 自身关联操作，people找child
	public People(){}
	public People(String name,int age){
		this.name=name;
		this.age=age;
	}
	public void setChildren(People children[]){
		this.children=children;
	}
	public People [] getChildren(){
		return this.children;
	}
	//获取车辆信息
	public void setCar(Car car){
		this.car=car;
	}
	public Car getCar(){
		return this.car;
	}
	//set get 略
	public String getInfo(){
		return "车主："+this.name+"、年龄："+this.age;
	}
}
public class Demo2 {

	public static void main(String[] args) {
		// 声明，创建实体对象并设置彼此关系
		People people=new People("凌强",24);
		People child1=new People("阿伟",12);
		People child2=new People("盼盼",11);
		
		Car car=new Car("宝马",400000.0);
		
		people.setCar(car);//人—车数据获取 		
		child1.setCar(new Car("法拉利",20000000.00));	//匿名对象
		child2.setCar(new Car("bmw",300000.0));     //匿名对象
		people.setChildren(new People[]{child1,child2});
		
		car.setPeople(people);//车—人数据获取
		//根据关系获取数据
		/*System.out.println(people.getCar().getInfo());//代码链。等同于car.getInfo()
		System.out.println(car.getInfo());
		System.out.println(car.getPeople().getInfo());//等同于people.getInfo()
		*/
		System.out.println(people.getInfo());
		//根据人找到所有的孩子以及孩子对应的车
		for(int x=0;x<people.getChildren().length;x++){
			System.out.println("\t-"+people.getChildren() [x].getInfo());//根据人获得孩子信息
			System.out.println("\t\t-"+people.getChildren()[x].getCar().getInfo());//根据大人获得孩子的全部信息
		}
	}

}
/*
车主：凌强、年龄：24
	-车主：阿伟、年龄：12
		-汽车型号：法拉利、价格2.0E7
	-车主：盼盼、年龄：11
		-汽车型号：bmw、价格300000.0
*/