1.JAVA JUC简介
2.volatile关键字-内存可见性（比同步锁快）
public class TestVolatile {
public static void main(String[] args) {
ThreadDemo td=new ThreadDemo();
new Thread(td).start();
while (true) {
if (td.isFlag()) {
System.out.println("-------");
break;
}
}
}
}
class ThreadDemo implements Runnable {
private volatile boolean flag = false;
//private boolean flag = false;
@Override
public void run() {
try {
Thread.sleep(200);
} catch (InterruptedException e) {
}
flag = true;
System.out.println("flag="+ isFlag());
}
public boolean isFlag() {
return flag;
}
public void setFlag(boolean flag) {
this.flag = flag;
}
}
//输出结果为：-------
flag=true
3.原子变量-CAS算法
public class TestAtomicDemo {
public static void main(String[] args) {
AtomicDemo ad = new AtomicDemo();
for (int i = 0; i < 10;i++) {
new Thread(ad).start();
}
}
}
class AtomicDemo implements Runnable {
//private volatile int serialNumber = 0;
private AtomicInteger serialNumber=new AtomicInteger();
@Override
public void run() {
try {
Thread.sleep(200);
} catch (InterruptedException e) {
}
System.out.println(Thread.currentThread().getName() + "："+getSerialNumber());
}
public int getSerialNumber() {
return serialNumber.getAndIncrement();
}
}
4.ConcurrentHashMap锁分段机制
5.CountDownLatch闭锁
6.实现Callable接口
7.Lock同步锁
8.Condition控制线程通信
9.线程八锁
10.线程按序交替
11.ReadWriteLock读写锁
12.线程池
13.线程调度
14.ForkJoinPool分支/合并框架 工作窃取
