1 package com.woniuxy.test2;
2
3 import java.util.Arrays;
4
5 /**
6 * @author wuwenjun
7 * @time 2020/11/12/21:07:41
8 */
9 //
10 class Product{
11 private String[] strs = "☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆".split(" ");
12
13 private int i;
14
15 public void put(){//加锁，防止放入时被抢走。
16 synchronized (this) {
17 while(i==strs.length){//当为最大时等待
18 try {
19 this.wait();
20 } catch (InterruptedException e) {
21 e.printStackTrace();
22 }
23 }
24
25 strs[i++] = "★";
26 System.out.println(Thread.currentThread().getName()+"放入:"+this);
27 this.notifyAll();//只要放入后就唤醒其它线程
28 }
29 }
30
31 public void get(){//加锁，防止取出时被被抢走中断。
32 synchronized (this) {
33 while(i==0){//当没有星星时，就等待
34 try {
35 this.wait();
36 } catch (InterruptedException e) {
37 e.printStackTrace();
38 }
39 }
40 //星星-1
41 strs[--i] = "☆";
42 System.out.println(Thread.currentThread().getName()+"取出:"+this);
43 this.notifyAll();//只要取出后，就唤醒其它线程
44 }
45 }
46
47 @Override
48 public String toString() {
49 return Arrays.toString(strs);
50 }
51 }
52
53 class Shop implements Runnable{
54
55 private Product product;
56
57 public Shop(Product product) {
58 this.product = product;
59 }
60
61 @Override
62 public void run() {
63 synchronized (this) {
64 while (true) {//不断的取
65 product.put();
66 }
67 }
68 }
69 }
70
71 class Consumer implements Runnable{
72
73 private Product product;
74
75 public Consumer(Product product) {
76 this.product = product;
77 }
78
79 @Override
80 public void run() {
81
82 synchronized (this) {
83 while (true) {
84 product.get();
85 }
86 }
87 }
88 }
89
90
91 public class ShopConsumer {
92 public static void main(String[] args) {
93 Product product = new Product();//共用的第三方对象
94
95 Shop shop = new Shop(product);
96 Consumer consumer = new Consumer(product);
97
98 Thread th = new Thread(shop,"商家1");
99 Thread th2 = new Thread(consumer,"用户1");
100 Thread th3 = new Thread(shop,"商家2");
101 Thread th4 = new Thread(consumer,"用户2");
102
103 th.start();
104 th2.start();
105 th3.start();
106 th4.start();
107
108 }
109 }
