1、 消費者與生產者（多個線程操作一個run方法時）1.5以前的版本
class Resource {
private String name;
private int count = 1;
private boolean flag = false;
public synchronized void set(String name) {
while (flag)
try {
wait();
} catch (Exception e) {
}
this.name = name + "--------" + count++;
System.out.println("----生產者：" + this.name);
flag = true;
this.notifyAll();
}
public synchronized void get() {
while (!flag)
try {
wait();
} catch (Exception e) {
}
System.out.println("消費者" + this.name);
flag = false;
notifyAll();
}
}
class Producer implements Runnable {
private Resource r;
Producer(Resource r) {
this.r = r;
}
public void run() {
while (true) {
r.set("商品");
}
}
}
class Consumer implements Runnable {
private Resource r;
Consumer(Resource r) {
this.r = r;
}
public void run() {
while (true)
r.get();
}
}
class ThreadDemo {
public static void main(String[] args) {
Resource r = new Resource();
Producer p = new Producer(r);
Consumer c = new Consumer(r);
Thread t1 = new Thread(p);
Thread t2 = new Thread(p);
Thread t3 = new Thread(p);
Thread t4 = new Thread(c);
t1.start();
t2.start();
t3.start();
t4.start();
}
}2、 消費者與生產者（多個線程操作一個run方法時）1.5以後的版本
import java.util.concurrent.locks.*;
class Resource {
private String name;
private int count = 1;
private boolean flag = false;
private Lock lock = new ReentrantLock();
private Condition condition_pro = lock.newCondition();
private Condition condition_con = lock.newCondition();
public void set(String name) throws InterruptedException {
lock.lock();
try {
while (flag)
condition_pro.await();
this.name = name + "--------" + count++;
System.out.println(Thread.currentThread().getName() + "----生產者："
+ this.name);
flag = true;
condition_con.signal();
} finally {
lock.unlock();
}
}
public void get() throws InterruptedException {
lock.lock();
try {
while (!flag)
condition_con.await();
System.out.println(Thread.currentThread().getName() + "消費者"
+ this.name);
flag = false;
condition_pro.signal();
} finally {
lock.unlock();
}
}
}
class Producer implements Runnable {
private Resource r;
Producer(Resource r) {
this.r = r;
}
public void run() {
while (true) {
try {
r.set("商品");
} catch (Exception e) {
}
}
}
}
class Consumer implements Runnable {
private Resource r;
Consumer(Resource r) {
this.r = r;
}
public void run() {
while (true) {
try {
r.get();
} catch (Exception e) {
}
}
}
}
class ThreadDemo {
public static void main(String[] args) {
Resource r = new Resource();
Producer p = new Producer(r);
Consumer c = new Consumer(r);
Thread t1 = new Thread(p);
Thread t2 = new Thread(p);
Thread t3 = new Thread(c);
Thread t4 = new Thread(c);
t1.start();
t2.start();
t3.start();
t4.start();
}
}
