java并发控制四种方法：
1.wait()/notify();
2. await() / signal() ;
3.BlockingQueue 阻塞队列方法；
4.PipedInputStream / PipedOutputStream
最常用的是wait()/notify()，简单demo见代码：
仓库类：
import java.util.LinkedList;
public class Storage {
public static final int MAX_SIZE = 100;
private LinkedList
生产者类：
public class Producer implements Runnable {
private int num;
private Storage storage;
public Producer(Storage storage){
this.storage = storage;
}
@Override
public void run() {
this.produce();
}
public void produce(){
this.storage.produce(this.num);
}
public int getNum() {
return num;
}
public void setNum(int num) {
this.num = num;
}
public Storage getStorage() {
return storage;
}
public void setStorage(Storage storage) {
this.storage = storage;
}
}
消费者类：
public class Consumer implements Runnable {
private int num;
private Storage storage;
public Consumer(Storage storage){
this.storage = storage;
}
@Override
public void run() {
this.consume();
}
private void consume(){
this.storage.consume(this.num);
}
public int getNum() {
return num;
}
public void setNum(int num) {
this.num = num;
}
public Storage getStorage() {
return storage;
}
public void setStorage(Storage storage) {
this.storage = storage;
}
}
测试方法类：
public class SysTest {
public static void main(String[] args) {
Storage storage = new Storage();
Producer pt1 = new Producer(storage);
pt1.setNum(10);
Producer pt2 = new Producer(storage);
pt2.setNum(10);
Producer pt3 = new Producer(storage);
pt3.setNum(10);
Producer pt4 = new Producer(storage);
pt4.setNum(10);
Producer pt5 = new Producer(storage);
pt5.setNum(10);
Producer pt6 = new Producer(storage);
pt6.setNum(10);
Producer pt7 = new Producer(storage);
pt7.setNum(80);
Thread p1 = new Thread(pt1);
Thread p2 = new Thread(pt2);
Thread p3 = new Thread(pt3);
Thread p4 = new Thread(pt4);
Thread p5 = new Thread(pt5);
Thread p6 = new Thread(pt6);
Thread p7 = new Thread(pt7);
Consumer ct1 = new Consumer(storage);
ct1.setNum(50);
Consumer ct2 = new Consumer(storage);
ct2.setNum(20);
Consumer ct3 = new Consumer(storage);
ct3.setNum(30);
Thread c1 = new Thread(ct1);
Thread c2 = new Thread(ct2);
Thread c3 = new Thread(ct3);
c1.start();
c2.start();
c3.start();
p1.start();
p2.start();
p3.start();
p4.start();
p5.start();
p6.start();
p7.start();
}
}
结果：
要消费的产品数量:50库存量:0暂时不能执行消费任务!
要消费的产品数量:30库存量:0暂时不能执行消费任务!
已经生产产品数:10现库存量为:10
要消费的产品数量:30库存量:10暂时不能执行消费任务!
要消费的产品数量:20库存量:10暂时不能执行消费任务!
要消费的产品数量:50库存量:10暂时不能执行消费任务!
已经生产产品数:10现库存量为:20
已经生产产品数:10现库存量为:30
已经生产产品数:10现库存量为:40
要消费的产品数量:50库存量:40暂时不能执行消费任务!
已经消费产品数:20现库存量为:20
要消费的产品数量:30库存量:20暂时不能执行消费任务!
已经生产产品数:10现库存量为:30
要消费的产品数量:50库存量:30暂时不能执行消费任务!
要生产的产品数量：80库存量30暂不能执行生产任务
已经消费产品数:30现库存量为:0
已经生产产品数:10现库存量为:10
已经生产产品数:80现库存量为:90
已经消费产品数:50现库存量为:40