1 package com.producerandconsumer;
 2 
 3 class Message2{
 4 private String name;
 5 private String deString;
 6 private boolean tag = true;
 7 public synchronized void setInf(String name,String deString) {
 8 if (!this.tag){//消費者未消費
 9 try {
10 super.wait();
11 } catch (InterruptedException e) {
12 // TODO Auto-generated catch block
 

13 e.printStackTrace();
14 }
15 }
16 this.name = name;
17 this.deString = deString;
18 this.tag = false;
19 super.notify();
20 }
21 public synchronized void getInf() {
22 if (this.tag) {//生產者未生產
23 try {
24 super.wait();
25 } catch (InterruptedException e) {
26 // TODO Auto-generated catch block
27 e.printStackTrace();
 
28 }
29 }
30 try{
31 System.out.println(this.name + " 是一個 " + this.deString + " 的人；" + Thread.currentThread().getName());
32 }finally {
33 this.tag = true;
34 super.notify();
35 }
36 }
37 }
38 class Producer1 implements Runnable{
39 private Message2 msg;
40 public Producer1(Message2 msg) {
41 // TODO Auto-generated constructor stub
 

42 this.msg = msg;
43 }
44 @Override
45 public void run() {
46 // TODO Auto-generated method stub
47 for (int i = 0; i < 100; i++) {
48 if (i%2 == 0) {
49 msg.setInf("王強", "樂觀的");
50 }else msg.setInf("張三", "自信的");
51 try {
52 Thread.sleep(1000);
53 } catch (InterruptedException e) {
54 // TODO Auto-generated catch block
55 e.printStackTrace();
56 }
57 }
58 }
59 }
60 class Cusumer2 implements Runnable{
61 private Message2 msg;
62 public Cusumer2(Message2 msg) {
63 // TODO Auto-generated constructor stub
64 this.msg = msg;
65 }
66 @Override
67 public void run() {
68 // TODO Auto-generated method stub
69 for    (int i = 0 ;i < 100;i++){
70 try {
71 Thread.sleep(1000);
72 } catch (InterruptedException e) {
73 // TODO Auto-generated catch block
74 e.printStackTrace();
75 }
76 msg.getInf();
77 }
78 }
79 
80 }
81 public class ProducerAndConsumerTest2 {
82 
83 @SuppressWarnings("unused")
84 public static void main(String[] args) {
85 // TODO Auto-generated method stub
86 Message2 message2 = new    Message2();
87 new Thread(new Producer1(message2),"生產者").start();
88 new    Thread(new Cusumer2(message2),"消費者").start();
89 }
90 
91 }

學到了：wait（）和notify（） notifyALL（）必須放在synchronized程式碼塊裡或者方法塊裡