Java class One-to-many, many-to-many

1. One-to-many

classperson{PrivateString name; PrivateString Phone; Privatecar[] cars;  PublicPerson () {} PublicPerson (String name,string phone) { This. Name =name;  This. Phone =phone; }     PublicString GetName () {returnname; }     Public voidsetName (String name) { This. Name =name; }     PublicString Getphone () {returnphone; }     Public voidSetphone (String phone) { This. Phone =phone; }     Publiccar[] Getcars () {returncars; }     Public voidSetcars (car[] cars) { This. Cars =cars; }     PublicString GetInfo () {return"Name:" +name+ ", Phone:" +phone; }}classcar{PrivateString brand; PrivateString color; Privateperson person ;  PublicCar () {} PublicCar (String brand,string color) { This. Brand =brand;  This. color =color; }     PublicString Getbrand () {returnbrand; }     Public voidSetphand (String brand) { This. Brand =brand; }     PublicString GetColor () {returncolor; }     Public voidsetcolor (String color) { This. color =color; }     PublicPerson Getperson () {returnPerson ; }     Public voidSetperson (person person) { This. person =Person ; }     PublicString GetInfo () {return"Brand:" +brand+ ", Color:" +color; }}classlei{ Public Static voidMain (string[] args) {person P1=NewPerson ("Lie Triple", "05333-6543887"); Person P2=NewPerson ("Zhao Si", "05333-6543000"); Car C1=NewCar ("Audi", "white"); Car C2=NewCar ("VW", "BLACK"); Car C3=NewCar ("Geely", "Red"); P1.setcars (Newcar[]{c1,c2}); P2.setcars (Newcar[]{c3});        C1.setperson (p1);        C2.setperson (p1);        C3.setperson (p2); System.out.println (P1.getinfo ()+ ", Car and car color:");  for(inti = 0;i < P1.getcars (). length;i++) {System.out.println (P1.getcars () [I].getinfo ());    } System.out.println (C1.getperson (). GetInfo ()); }}

2. Many-to-many

classshop{PrivateString name; PrivateString City; Privategoods[] Goods;  PublicShop () {} PublicShop (String name,string city) { This. Name =name;  This. City =City ; }     PublicString GetName () {returnname; }     Public voidsetName (String name) { This. Name =name; }     PublicString getcity () {returnCity ; }     Public voidsetcity (String city) { This. City =City ; }     Publicgoods[] Getgoods () {returngoods; }     Public voidsetgoods (goods[] Goods) { This. Goods =goods; }     PublicString GetInfo () {return"Arcade:" +name+ ", Area:" +City ; }}classgoods{PrivateString name; Private DoublePrice ; Privateshop[] shops;  PublicGoods () {} PublicGoods (String name,DoublePrice ) {         This. Name =name;  This. Price =Price ; }     PublicString GetName () {returnname; }     Public voidsetName (String name) { This. Name =name; }     Public DoubleGetPrice () {returnPrice ; }     Public voidSetprice (DoublePrice ) {         This. Price =Price ; }     Publicshop[] Getshop () {returnshops; }     Public voidSetshop (shop[] shops) { This. Shops =shops; }     PublicString GetInfo () {return"Product Name:" +name+ ", Price:" +Price ; }}classzio{ Public Static voidMain (string[] args) {shop S1=NewShop ("Carrefour", "Qingdao"); Shop S2=NewShop ("Big Run Hair", "Zibo"); Shop S3=NewShop ("Family Fun", "Sunshine"); Goods G1=NewGoods ("shirts", 189.5); Goods G2=NewGoods ("Red wine", 489.99); Goods G3=NewGoods ("Huiyuan beverage", 12.0); //a shopping mall can sell a variety of goodsS1.setgoods (Newgoods[]{g1,g2,g3}); S2.setgoods (Newgoods[]{g2,g3}); S3.setgoods (Newgoods[]{g1,g3}); //a product can be sold in multiple storesG1.setshop (NewSHOP[]{S1,S3}); G2.setshop (Newshop[]{s1,s2}); G3.setshop (NewSHOP[]{S1,S2,S3}); System.out.println (S1.getinfo ()+ "Goods and Prices sold:");//S1 Object Call GetInfo () method         for(inti = 0;i < S1.getgoods (). length;i++) {//Array TraversalSystem.out.println (S1.getgoods () [I].getinfo ());        } System.out.println (); System.out.println (G3.getinfo ()+ "Location of the Mall and City:");//G3 Object Call GetInfo () method         for(inti = 0;i < G3.getshop (). length;i++) {//Array TraversalSystem.out.println (G3.getshop () [I].getinfo ()); }    }}

Java class One-to-many, many-to-many