JAVA之间的引用传递

心已赠人 2022-01-07 19:39 153阅读 0赞

通过类与对象之间的引用传递来理解引用传递的机制

**Person类**

public class Person {
    	private int age ;
    	private String name ;
    	private Book book ;//一个人有一个书
    	private Person child ;//一个人有一个孩纸
    
    	public Person(int age, String name) { //构造函数
    		super();
    		this.age = age;
    		this.name = name;
    	}
    	public int getAge() {
    		return age;
    	}
    	public void setAge(int age) {
    		this.age = age;
    	}
    	public String getName() {
    		return name;
    	}
    	public void setName(String name) {
    		this.name = name;
    	}
    	public Book getBook() {
    		return book;
    	}
    	public void setBook(Book book) {
    		this.book = book;
    	}
    	
    	public Person getChild() {
    		return child;
    	}
    	public void setChild(Person child) {
    		this.child = child;
    	}
    }

**　　Book类**

public class Book {
    	private String title ;
    	private double price ;
    	private Person person ; //一本书属于一个人
    	
    	public Book(String title, double price) {
    		super();
    		this.title = title;
    		this.price = price;
    	}
    	
    	public String getTitle() {
    		return title;
    	}
    	public void setTitle(String title) {
    		this.title = title;
    	}
    	public double getPrice() {
    		return price;
    	}
    	public void setPrice(double price) {
    		this.price = price;
    	}
    	public Person getPerson() {
    		return person;
    	}
    	public void setPerson(Person person) {
    		this.person = person;
    	}
    }

RefTest类，测试主类

public class RefTest {
    
    	/**
    	 * @param args
    	 * 对象之间的引用传递
    	 */
    	public static void main(String[] args) {
    		// TODO Auto-generated method stub
    		Person per = new Person(30,"张三") ;
    		Person cld = new Person(10,"张草") ;
    		Book bk = new Book("JAVA开发实战经典",30.3) ;
    		Book b = new Book("一千零一夜",10.3) ;
    		
    		per.setBook(bk) ;//设置两个对象之间的关系,一个人拥有一本书
    		bk.setPerson(per) ;//设置两个对象之间的关系,一本书属于一个人
    		cld.setBook(b) ; //一个孩纸有一本书
    		b.setPerson(cld) ;//一个书属于一个孩纸
    		per.setChild(cld) ;//一个人有一个孩子
    		
    		System.out.println("从人找到书————————>姓名:"+per.getName()+",年龄:"+per.getAge()+",书名:"
    				+per.getBook().getTitle()+",价格:"+per.getBook().getPrice());
    		System.out.println("从书找到人————————>书名："+bk.getTitle()+",价格:"+bk.getPrice()+",姓名:"
    				+bk.getPerson().getName()+",年龄:"+bk.getPerson().getName());
    		//通过人找到孩纸，并找到孩纸拥有的书
    		System.out.println(per.getName()+"的孩纸————>姓名:"+per.getChild().getName()+",年龄:"
    				+per.getChild().getAge()+",书名:"+per.getChild().getBook().getTitle()+
    				",价格:"+per.getChild().getBook().getPrice());
    	}
    
    }

转载于:https://www.cnblogs.com/goforitjava/p/3680777.html