线程同步处理： 同步指的是所有的线程不是一起进入到方法里面执行，而是按照顺序一个一个来
Synchornized处理同步问题和Lock锁处理同步问题
Synchornize处理同步问题有两种方法：
1.同步代码块
2.同步方法
实现：1.
package www.xianchengtongbu;
class MyThread implements Runnable {
private Integer tickets = 10;
@Override
public void run() {
synchronized (this) {//同步代码块，锁定进入此代码块的对象，一次只能进入一个线程
//为逻辑行为上锁
while (tickets > 0) {//还有票
try {
Thread.sleep(200);//模拟网络延迟
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println(Thread.currentThread().getName() + "还剩：" + tickets-- + "张票");
}
}
}
}
public class Synchronized_TongBu {
public static void main(String[] args) {
MyThread myThread = new MyThread();
Thread thread = new Thread(myThread, "黄牛A");
Thread thread1 = new Thread(myThread, "黄牛B");
Thread thread2 = new Thread(myThread, "黄牛C");
thread.start();
thread1.start();
thread2.start();
}
}
实现： 2.同步方法：
package www.xianchengtongbu;
class MyTest implements Runnable{
private int tickets=10;
@Override
public void run() {
for(int i=tickets;i>0;i--) {
this.sale();
}
}
public synchronized void sale() { //同步方法
if(this.tickets>0) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println(Thread.currentThread().getName()+"还剩："+tickets--+"张票");
}
}
}
public class Synchronized_TongbuFangFa {
public static void main(String[] args) {
MyTest myTest=new MyTest();
Thread thread=new Thread(myTest,"黄牛A");
Thread thread2=new Thread(myTest,"黄牛B");
Thread thread3=new Thread(myTest,"黄牛C");
thread.start();
thread2.start();
thread3.start();
}
}
JDK1.5提供的lock锁（了解就好）